Built 2026-10-15 (15 October 2026)

Livermore Weather Records (USC00044997)

Record envelope, standing records and threshold days for Livermore (USC00044997), California, United States, with 124 years of record.

Key Facts for Livermore

  • Livermore (USC00044997) is a weather station in California, United States at 37.68 latitude and -121.75 longitude, 161 m (529 ft) above sea level.
  • The station reports from 1903 to 2026, 124 years of record.
  • 1,464 records set at Livermore still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Livermore set a daily record high minimum temperature of 15.0 C (59.0 F) on 8 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: California, United States, 37.68 latitude, -121.75 longitude.
  • Elevation: 161 m (529 ft).
  • Period of record: 1903 to 2026, 124 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

8 days at or beyond a record
Daily record high and record low at Livermore, with 2026 drawn through them The band shows the record high and record low for each calendar day at Livermore. The lines show the 2026 daily maximum and minimum. 8 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Livermore. The lines show the 2026 daily maximum and minimum. 8 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Livermore, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan27.2 C (81.0 F)-7.8 C (18.0 F)20.0 C (68.0 F)-1.1 C (30.0 F)
Feb27.8 C (82.0 F)-6.1 C (21.0 F)27.2 C (81.0 F)-0.6 C (30.9 F)
Mar32.8 C (91.0 F)-5.6 C (21.9 F)32.8 C (91.0 F)3.9 C (39.0 F)
Apr36.1 C (97.0 F)-1.7 C (28.9 F)30.0 C (86.0 F)4.4 C (39.9 F)
May42.2 C (108.0 F)0.0 C (32.0 F)33.9 C (93.0 F)7.8 C (46.0 F)
Jun45.0 C (113.0 F)2.8 C (37.0 F)37.8 C (100.0 F)8.3 C (46.9 F)
Jul45.0 C (113.0 F)2.2 C (36.0 F)38.9 C (102.0 F)10.6 C (51.1 F)
Aug44.4 C (111.9 F)4.4 C (39.9 F)40.0 C (104.0 F)11.1 C (52.0 F)
Sep46.7 C (116.1 F)1.7 C (35.1 F)39.4 C (102.9 F)8.3 C (46.9 F)
Oct43.3 C (109.9 F)-1.7 C (28.9 F)37.8 C (100.0 F)6.7 C (44.1 F)
Nov33.9 C (93.0 F)-5.6 C (21.9 F)n/an/a
Dec26.1 C (79.0 F)-7.8 C (18.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Livermore by the year they were set 1,464 records at Livermore still stand. 1917 holds the most, with 38. 0102030401903: 151904: 111905: 221906: 111907: 71908: 181909: 181910: 261911: 191912: 171913: 291914: 181915: 161916: 211917: 381918: 141919: 161920: 231921: 281922: 131923: 191924: 171925: 101926: 141927: 111928: 141929: 171930: 111931: 141932: 141933: 101934: 141935: 161936: 161937: 131938: 51939: 111940: 61941: 91942: 81943: 91944: 61945: 91946: 151947: 191948: 111949: 161950: 201951: 101952: 141953: 71954: 91955: 91956: 71957: 51958: 141959: 81960: 101961: 201962: 111963: 171964: 241965: 151966: 71967: 161968: 111969: 81970: 121971: 161972: 241973: 101974: 61975: 81976: 111977: 161978: 111979: 51980: 61981: 61982: 111983: 61984: 51985: 131986: 71987: 121988: 31989: 151990: 151991: 101992: 61993: 41994: 21995: 71996: 121997: 121998: 111999: 82000: 152001: 72002: 42003: 32004: 92005: 22006: 122007: 52008: 62009: 102010: 62011: 42012: 92013: 102014: 52015: 62016: 52017: 142018: 52019: 72020: 52021: 102022: 252023: 52024: 112025: 112026: 71903191619291942195519681981199420072020
1,464 records at Livermore still stand. 1917 holds the most, with 38.
Standing records at Livermore by the year they were set
Year setStanding records
190315
190411
190522
190611
19077
190818
190918
191026
191119
191217
191329
191418
191516
191621
191738
191814
191916
192023
192128
192213
192319
192417
192510
192614
192711
192814
192917
193011
193114
193214
193310
193414
193516
193616
193713
19385
193911
19406
19419
19428
19439
19446
19459
194615
194719
194811
194916
195020
195110
195214
19537
19549
19559
19567
19575
195814
19598
196010
196120
196211
196317
196424
196515
19667
196716
196811
19698
197012
197116
197224
197310
19746
19758
197611
197716
197811
19795
19806
19816
198211
19836
19845
198513
19867
198712
19883
198915
199015
199110
19926
19934
19942
19957
199612
199712
199811
19998
200015
20017
20024
20033
20049
20052
200612
20075
20086
200910
20106
20114
20129
201310
20145
20156
20165
201714
20185
20197
20205
202110
202225
20235
202411
202511
20267

All-Time Record Progression

6 new records
When Livermore set new all-time records 6 all-time records were set at Livermore between 3 September 1950 and 5 September 2022. Each dot is a new record. Record high maximum temperatureRecord low minimum temperatureRecord high minimum temperature3 September 1950: Record high maximum temperature 46.1 C (115.0 F)5 January 1961: Record low minimum temperature -7.8 C (18.0 F)15 September 1971: Record high minimum temperature 23.9 C (75.0 F)12 July 1999: Record high minimum temperature 24.4 C (75.9 F)23 July 2006: Record high minimum temperature 26.1 C (79.0 F)5 September 2022: Record high maximum temperature 46.7 C (116.1 F)19501960197019801990200020102020
6 all-time records were set at Livermore between 3 September 1950 and 5 September 2022. Each dot is a new record.
When Livermore set new all-time records
DateKindDetail
1950-09-03Record high maximum temperatureRecord high maximum temperature 46.1 C (115.0 F)
1961-01-05Record low minimum temperatureRecord low minimum temperature -7.8 C (18.0 F)
1971-09-15Record high minimum temperatureRecord high minimum temperature 23.9 C (75.0 F)
1999-07-12Record high minimum temperatureRecord high minimum temperature 24.4 C (75.9 F)
2006-07-23Record high minimum temperatureRecord high minimum temperature 26.1 C (79.0 F)
2022-09-05Record high maximum temperatureRecord high maximum temperature 46.7 C (116.1 F)

Wettest Day of Each Month

Sep: 100.8 mm (4.0 in)
Record daily precipitation for each month at Livermore The wettest day on record for each calendar month at Livermore. The most was 100.8 mm (4.0 in) on 12 September 1918. 050100150 Jan: 98.6 mm (3.9 in), 2 January 2023 Jan Feb: 74.4 mm (2.9 in), 1 February 1963 Feb Mar: 50.8 mm (2.0 in), 21 March 1937 Mar Apr: 45.7 mm (1.8 in), 3 April 1958 Apr May: 22.9 mm (0.9 in), 7 May 1905 May Jun: 15.2 mm (0.6 in), 16 June 1995 Jun Jul: 17.0 mm (0.7 in), 2 July 1980 Jul Aug: 12.7 mm (0.5 in), 19 August 1983 Aug Sep: 100.8 mm (4.0 in), 12 September 1918 Sep Oct: 77.5 mm (3.1 in), 25 October 2021 Oct Nov: 77.5 mm (3.1 in), 19 November 1950 Nov Dec: 82.8 mm (3.3 in), 23 December 1955 Dec
The wettest day on record for each calendar month at Livermore. The most was 100.8 mm (4.0 in) on 12 September 1918.
Record daily precipitation for each month at Livermore
MonthRecord daily precipitation (mm)Date
Jan98.6 mm (3.9 in)2 January 2023
Feb74.4 mm (2.9 in)1 February 1963
Mar50.8 mm (2.0 in)21 March 1937
Apr45.7 mm (1.8 in)3 April 1958
May22.9 mm (0.9 in)7 May 1905
Jun15.2 mm (0.6 in)16 June 1995
Jul17.0 mm (0.7 in)2 July 1980
Aug12.7 mm (0.5 in)19 August 1983
Sep100.8 mm (4.0 in)12 September 1918
Oct77.5 mm (3.1 in)25 October 2021
Nov77.5 mm (3.1 in)19 November 1950
Dec82.8 mm (3.3 in)23 December 1955

Period of Record Coverage

1903 to 2026
Days with data per year at Livermore 124 years of record at Livermore, 1903 to 2026. 7 years have data for under 90 percent of days and are left out of rankings: 1907, 1918, 1932, 1972, 1973, 2020, 2026. 1903: 357 of 365 days1904: 354 of 366 days1905: 353 of 365 days1906: 347 of 365 days1907: 325 of 365 days1908: 350 of 366 days1909: 335 of 365 days1910: 356 of 365 days1911: 364 of 365 days1912: 354 of 366 days1913: 342 of 365 days1914: 329 of 365 days1915: 363 of 365 days1916: 365 of 366 days1917: 364 of 365 days1918: 323 of 365 days1919: 365 of 365 days1920: 365 of 366 days1921: 365 of 365 days1922: 365 of 365 days1923: 365 of 365 days1924: 354 of 366 days1925: 358 of 365 days1926: 365 of 365 days1927: 364 of 365 days1928: 358 of 366 days1929: 364 of 365 days1930: 335 of 365 days1931: 361 of 365 days1932: 218 of 366 days1933: 365 of 365 days1934: 365 of 365 days1935: 364 of 365 days1936: 336 of 366 days1937: 365 of 365 days1938: 364 of 365 days1939: 365 of 365 days1940: 366 of 366 days1941: 365 of 365 days1942: 363 of 365 days1943: 362 of 365 days1944: 366 of 366 days1945: 361 of 365 days1946: 363 of 365 days1947: 364 of 365 days1948: 364 of 366 days1949: 365 of 365 days1950: 357 of 365 days1951: 355 of 365 days1952: 361 of 366 days1953: 350 of 365 days1954: 359 of 365 days1955: 359 of 365 days1956: 362 of 366 days1957: 354 of 365 days1958: 365 of 365 days1959: 355 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 364 of 365 days1963: 364 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 364 of 366 days1969: 365 of 365 days1970: 361 of 365 days1971: 365 of 365 days1972: 303 of 366 days1973: 304 of 365 days1974: 334 of 365 days1975: 365 of 365 days1976: 363 of 366 days1977: 333 of 365 days1978: 334 of 365 days1979: 362 of 365 days1980: 362 of 366 days1981: 364 of 365 days1982: 364 of 365 days1983: 364 of 365 days1984: 365 of 366 days1985: 365 of 365 days1986: 362 of 365 days1987: 333 of 365 days1988: 365 of 366 days1989: 365 of 365 days1990: 364 of 365 days1991: 364 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 335 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 335 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 363 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 365 of 365 days2018: 365 of 365 days2019: 365 of 365 days2020: 152 of 366 days2021: 365 of 365 days2022: 364 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 365 of 365 days2026: 284 of 365 days192019401960198020002020
124 years of record at Livermore, 1903 to 2026. 7 years have data for under 90 percent of days and are left out of rankings: 1907, 1918, 1932, 1972, 1973, 2020, 2026.
Days with data per year at Livermore
YearDays with dataShare of yearComplete
190335798%Yes
190435497%Yes
190535397%Yes
190634795%Yes
190732589%No
190835096%Yes
190933592%Yes
191035698%Yes
1911364100%Yes
191235497%Yes
191334294%Yes
191432990%Yes
191536399%Yes
1916365100%Yes
1917364100%Yes
191832388%No
1919365100%Yes
1920365100%Yes
1921365100%Yes
1922365100%Yes
1923365100%Yes
192435497%Yes
192535898%Yes
1926365100%Yes
1927364100%Yes
192835898%Yes
1929364100%Yes
193033592%Yes
193136199%Yes
193221860%No
1933365100%Yes
1934365100%Yes
1935364100%Yes
193633692%Yes
1937365100%Yes
1938364100%Yes
1939365100%Yes
1940366100%Yes
1941365100%Yes
194236399%Yes
194336299%Yes
1944366100%Yes
194536199%Yes
194636399%Yes
1947364100%Yes
194836499%Yes
1949365100%Yes
195035798%Yes
195135597%Yes
195236199%Yes
195335096%Yes
195435998%Yes
195535998%Yes
195636299%Yes
195735497%Yes
1958365100%Yes
195935597%Yes
1960366100%Yes
1961365100%Yes
1962364100%Yes
1963364100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
196836499%Yes
1969365100%Yes
197036199%Yes
1971365100%Yes
197230383%No
197330483%No
197433492%Yes
1975365100%Yes
197636399%Yes
197733391%Yes
197833492%Yes
197936299%Yes
198036299%Yes
1981364100%Yes
1982364100%Yes
1983364100%Yes
1984365100%Yes
1985365100%Yes
198636299%Yes
198733391%Yes
1988365100%Yes
1989365100%Yes
1990364100%Yes
1991364100%Yes
1992366100%Yes
1993365100%Yes
199433592%Yes
1995365100%Yes
1996366100%Yes
1997365100%Yes
1998365100%Yes
1999365100%Yes
200033592%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
200436399%Yes
2005365100%Yes
2006365100%Yes
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
2016366100%Yes
2017365100%Yes
2018365100%Yes
2019365100%Yes
202015242%No
2021365100%Yes
2022364100%Yes
2023365100%Yes
2024366100%Yes
2025365100%Yes
202628478%No

Latest Records

20
Latest records at Livermore
DateStationRecordValueBeat old record byOld record stoodSignificance
8 October 2026Livermore, USdaily high min (Provisional)15.0 C (59.0 F)0.6 C (1.1 F)47 years25 of 100 (Routine)
7 October 2026Livermore, USdaily high min (Tie, Provisional)15.6 C (60.1 F)tie96 years9 of 100 (Routine)
5 October 2026Livermore, USdaily high min (Provisional)16.1 C (61.0 F)0.5 C (0.9 F)108 years41 of 100 (Notable)
10 September 2026Livermore, USdaily high min (Provisional)20.6 C (69.1 F)2.3 C (4.1 F)4 years19 of 100 (Routine)
4 September 2026Livermore, USdaily rain (Provisional)1.3 mm (0.05 in)0.5 mm (0.02 in)113 years20 of 100 (Routine)
15 July 2026Livermore, USdaily high min (Tie)18.9 C (66.0 F)tie96 years9 of 100 (Routine)
27 June 2026Livermore, USdaily rain (Tie)0.3 mm (0.01 in)tie35 years5 of 100 (Routine)
21 April 2026Livermore, USdaily rain19.8 mm (0.8 in)3.8 mm (0.15 in)4 years17 of 100 (Routine)
10 April 2026Livermore, USdaily high min (Tie)12.2 C (54.0 F)tie24 years4 of 100 (Routine)
5 April 2026Livermore, USdaily high max30.0 C (86.0 F)1.1 C (2.0 F)109 years42 of 100 (Notable)
29 March 2026Livermore, USdaily high max31.7 C (89.1 F)2.3 C (4.1 F)11 years18 of 100 (Routine)
28 March 2026Livermore, USdaily high max29.4 C (84.9 F)1.6 C (2.9 F)96 years41 of 100 (Notable)
27 March 2026Livermore, USdaily high max (Tie)27.8 C (82.0 F)tie96 years9 of 100 (Routine)
24 March 2026Livermore, USdaily high max29.4 C (84.9 F)0.5 C (0.9 F)0 years11 of 100 (Routine)
20 March 2026Livermore, USmonthly high max32.8 C (91.0 F)0.6 C (1.1 F)0 years21 of 100 (Routine)
19 March 2026Livermore, USdaily high max30.6 C (87.1 F)2.8 C (5.0 F)11 years19 of 100 (Routine)
18 March 2026Livermore, USdaily high max30.6 C (87.1 F)0.6 C (1.1 F)21 years17 of 100 (Routine)
17 February 2026Livermore, USdaily low max (Tie)8.3 C (46.9 F)tie36 years5 of 100 (Routine)
16 February 2026Livermore, USdaily rain33.5 mm (1.3 in)3.5 mm (0.14 in)36 years24 of 100 (Routine)
21 December 2025Livermore, USdaily high min13.9 C (57.0 F)1.7 C (3.1 F)84 years39 of 100 (Notable)

Climate Trend

102 complete years, 1903 to 2025
Annual mean temperature at Livermore as warming stripes, 1903 to 2025 One stripe for each of 102 complete years at Livermore, 1903 to 2025. Blue stripes are years cooler than the station's own mean of 15.3 C (59.6 F); red stripes are warmer. The coolest year was 1963, at 13.6 C (56.4 F), and the warmest was 2014, at 17.4 C (63.3 F). The strongest colour marks a difference of 2.1 C (3.8 F). 1903: 15.1 C, -0.3 C from the station mean1904: 15.3 C, -0.1 C from the station mean1905: 15.1 C, -0.2 C from the station mean1906: 15.6 C, +0.2 C from the station mean1910: 15.4 C, 0.0 C from the station mean1911: 14.6 C, -0.7 C from the station mean1912: 15.2 C, -0.2 C from the station mean1913: 15.7 C, +0.4 C from the station mean1915: 16.0 C, +0.6 C from the station mean1916: 14.9 C, -0.4 C from the station mean1917: 15.0 C, -0.4 C from the station mean1919: 14.4 C, -0.9 C from the station mean1921: 15.1 C, -0.3 C from the station mean1922: 13.9 C, -1.5 C from the station mean1923: 14.0 C, -1.3 C from the station mean1925: 14.1 C, -1.3 C from the station mean1926: 15.2 C, -0.1 C from the station mean1927: 14.3 C, -1.1 C from the station mean1928: 15.2 C, -0.2 C from the station mean1929: 15.1 C, -0.3 C from the station mean1931: 16.5 C, +1.2 C from the station mean1933: 14.7 C, -0.6 C from the station mean1934: 15.9 C, +0.5 C from the station mean1935: 13.9 C, -1.4 C from the station mean1937: 15.2 C, -0.2 C from the station mean1938: 14.7 C, -0.6 C from the station mean1939: 15.3 C, -0.1 C from the station mean1940: 15.6 C, +0.3 C from the station mean1941: 15.2 C, -0.1 C from the station mean1942: 14.7 C, -0.6 C from the station mean1943: 15.1 C, -0.3 C from the station mean1944: 14.8 C, -0.6 C from the station mean1945: 15.0 C, -0.3 C from the station mean1948: 15.3 C, 0.0 C from the station mean1949: 14.4 C, -0.9 C from the station mean1950: 15.5 C, +0.1 C from the station mean1951: 14.8 C, -0.5 C from the station mean1952: 15.0 C, -0.4 C from the station mean1953: 14.6 C, -0.8 C from the station mean1954: 14.4 C, -1.0 C from the station mean1955: 14.2 C, -1.2 C from the station mean1956: 14.5 C, -0.8 C from the station mean1957: 15.0 C, -0.3 C from the station mean1958: 16.4 C, +1.1 C from the station mean1959: 15.6 C, +0.3 C from the station mean1960: 14.7 C, -0.6 C from the station mean1961: 14.5 C, -0.9 C from the station mean1962: 14.1 C, -1.2 C from the station mean1963: 13.6 C, -1.8 C from the station mean1964: 13.9 C, -1.4 C from the station mean1965: 14.1 C, -1.3 C from the station mean1966: 14.8 C, -0.6 C from the station mean1967: 14.7 C, -0.7 C from the station mean1968: 15.0 C, -0.3 C from the station mean1969: 15.3 C, 0.0 C from the station mean1970: 15.4 C, +0.1 C from the station mean1971: 14.4 C, -0.9 C from the station mean1975: 14.5 C, -0.8 C from the station mean1976: 15.1 C, -0.2 C from the station mean1979: 15.3 C, 0.0 C from the station mean1980: 15.4 C, 0.0 C from the station mean1981: 16.2 C, +0.8 C from the station mean1982: 14.3 C, -1.0 C from the station mean1983: 15.4 C, 0.0 C from the station mean1984: 15.4 C, +0.1 C from the station mean1985: 15.1 C, -0.2 C from the station mean1986: 15.7 C, +0.3 C from the station mean1988: 16.1 C, +0.8 C from the station mean1989: 15.3 C, -0.1 C from the station mean1990: 15.6 C, +0.3 C from the station mean1991: 15.6 C, +0.3 C from the station mean1992: 16.4 C, +1.0 C from the station mean1993: 15.7 C, +0.3 C from the station mean1995: 16.2 C, +0.8 C from the station mean1996: 16.6 C, +1.2 C from the station mean1997: 16.4 C, +1.0 C from the station mean1998: 15.3 C, -0.1 C from the station mean1999: 15.5 C, +0.2 C from the station mean2001: 16.5 C, +1.1 C from the station mean2002: 16.0 C, +0.7 C from the station mean2003: 16.3 C, +1.0 C from the station mean2004: 16.2 C, +0.8 C from the station mean2005: 16.2 C, +0.8 C from the station mean2006: 16.1 C, +0.7 C from the station mean2007: 15.8 C, +0.5 C from the station mean2008: 16.0 C, +0.7 C from the station mean2009: 15.9 C, +0.6 C from the station mean2010: 15.4 C, 0.0 C from the station mean2011: 15.2 C, -0.2 C from the station mean2012: 16.0 C, +0.7 C from the station mean2013: 15.9 C, +0.6 C from the station mean2014: 17.4 C, +2.1 C from the station mean2015: 16.6 C, +1.3 C from the station mean2016: 16.3 C, +1.0 C from the station mean2017: 16.4 C, +1.1 C from the station mean2018: 15.9 C, +0.5 C from the station mean2019: 15.9 C, +0.5 C from the station mean2021: 16.4 C, +1.1 C from the station mean2022: 16.7 C, +1.3 C from the station mean2023: 16.1 C, +0.8 C from the station mean2024: 17.2 C, +1.9 C from the station mean2025: 16.3 C, +1.0 C from the station mean1903191019201930194019501960197019801990200020102020
One stripe for each of 102 complete years at Livermore, 1903 to 2025. Blue stripes are years cooler than the station's own mean of 15.3 C (59.6 F); red stripes are warmer. The coolest year was 1963, at 13.6 C (56.4 F), and the warmest was 2014, at 17.4 C (63.3 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Livermore as warming stripes, 1903 to 2025
YearAnnual mean temperatureDifference from the station mean
190315.1 C-0.26 C
190415.3 C-0.08 C
190515.1 C-0.25 C
190615.6 C+0.22 C
191015.4 C+0.01 C
191114.6 C-0.72 C
191215.2 C-0.17 C
191315.7 C+0.36 C
191516.0 C+0.64 C
191614.9 C-0.43 C
191715.0 C-0.36 C
191914.4 C-0.94 C
192115.1 C-0.28 C
192213.9 C-1.47 C
192314.0 C-1.32 C
192514.1 C-1.28 C
192615.2 C-0.12 C
192714.3 C-1.06 C
192815.2 C-0.17 C
192915.1 C-0.29 C
193116.5 C+1.20 C
193314.7 C-0.61 C
193415.9 C+0.52 C
193513.9 C-1.40 C
193715.2 C-0.17 C
193814.7 C-0.63 C
193915.3 C-0.06 C
194015.6 C+0.26 C
194115.2 C-0.12 C
194214.7 C-0.63 C
194315.1 C-0.26 C
194414.8 C-0.59 C
194515.0 C-0.33 C
194815.3 C-0.05 C
194914.4 C-0.90 C
195015.5 C+0.14 C
195114.8 C-0.55 C
195215.0 C-0.39 C
195314.6 C-0.78 C
195414.4 C-0.96 C
195514.2 C-1.17 C
195614.5 C-0.85 C
195715.0 C-0.31 C
195816.4 C+1.06 C
195915.6 C+0.25 C
196014.7 C-0.62 C
196114.5 C-0.89 C
196214.1 C-1.22 C
196313.6 C-1.79 C
196413.9 C-1.45 C
196514.1 C-1.27 C
196614.8 C-0.56 C
196714.7 C-0.69 C
196815.0 C-0.34 C
196915.3 C-0.03 C
197015.4 C+0.08 C
197114.4 C-0.94 C
197514.5 C-0.84 C
197615.1 C-0.23 C
197915.3 C-0.04 C
198015.4 C+0.03 C
198116.2 C+0.82 C
198214.3 C-1.04 C
198315.4 C+0.04 C
198415.4 C+0.07 C
198515.1 C-0.20 C
198615.7 C+0.31 C
198816.1 C+0.77 C
198915.3 C-0.06 C
199015.6 C+0.26 C
199115.6 C+0.25 C
199216.4 C+1.01 C
199315.7 C+0.34 C
199516.2 C+0.82 C
199616.6 C+1.21 C
199716.4 C+1.04 C
199815.3 C-0.09 C
199915.5 C+0.19 C
200116.5 C+1.13 C
200216.0 C+0.66 C
200316.3 C+0.96 C
200416.2 C+0.82 C
200516.2 C+0.84 C
200616.1 C+0.71 C
200715.8 C+0.50 C
200816.0 C+0.68 C
200915.9 C+0.55 C
201015.4 C+0.03 C
201115.2 C-0.17 C
201216.0 C+0.68 C
201315.9 C+0.55 C
201417.4 C+2.07 C
201516.6 C+1.28 C
201616.3 C+0.98 C
201716.4 C+1.06 C
201815.9 C+0.51 C
201915.9 C+0.53 C
202116.4 C+1.08 C
202216.7 C+1.31 C
202316.1 C+0.77 C
202417.2 C+1.85 C
202516.3 C+0.96 C

The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1903 to 2025. In Fahrenheit: 0.2 F (0.2 to 0.3) per decade. The slope is a straight line fitted to 102 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Livermore
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.1 C (0.1 to 0.2) per decade0.2 F (0.2 to 0.3) per decade1903 to 2025102Rise
Mean daily maximum0.08 C (0.03 to 0.13) per decade0.1 F (0.1 to 0.2) per decade1903 to 2025102Rise
Mean daily minimum0.2 C (0.1 to 0.2) per decade0.3 F (0.2 to 0.4) per decade1903 to 2025102Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1903 to 2026
Yearly extremes at Livermore: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)46.7 C (116.1 F)202241.7 C (107.1 F)124
Coldest night (TNn)-7.8 C (18.0 F)1961-3.9 C (25.0 F)124
Wettest day (Rx1day)100.8 mm (4.0 in)191833.1 mm (1.3 in)124
Wettest five days (Rx5day)195.1 mm (7.7 in)191161.8 mm (2.4 in)124
Longest dry spell (CDD)206 days1917121 days124

Hottest day (TXx)

Hottest day (TXx) at Livermore by year The hottest day of the year at Livermore, 1903 to 2026. The record is 46.7 C (116.1 F) in 2022, marked on the chart; the median year is 41.7 C (107.1 F). 3537.54042.54547.5192019401960198020002020Record: 46.7 C (116.1 F) in 2022
The hottest day of the year at Livermore, 1903 to 2026. The record is 46.7 C (116.1 F) in 2022, marked on the chart; the median year is 41.7 C (107.1 F).
Hottest day (TXx) at Livermore by year
YearHottest day (TXx)
190342.2 C (108.0 F)
190442.2 C (108.0 F)
190545.0 C (113.0 F)
190642.8 C (109.0 F)
190738.3 C (100.9 F)
190841.7 C (107.1 F)
190941.1 C (106.0 F)
191042.2 C (108.0 F)
191141.7 C (107.1 F)
191242.2 C (108.0 F)
191343.9 C (111.0 F)
191443.9 C (111.0 F)
191542.2 C (108.0 F)
191642.2 C (108.0 F)
191744.4 C (111.9 F)
191842.2 C (108.0 F)
191937.2 C (99.0 F)
192040.6 C (105.1 F)
192141.1 C (106.0 F)
192240.0 C (104.0 F)
192341.1 C (106.0 F)
192437.8 C (100.0 F)
192541.1 C (106.0 F)
192641.1 C (106.0 F)
192737.2 C (99.0 F)
192841.1 C (106.0 F)
192941.1 C (106.0 F)
193037.2 C (99.0 F)
193141.1 C (106.0 F)
193241.7 C (107.1 F)
193343.3 C (109.9 F)
193442.2 C (108.0 F)
193542.2 C (108.0 F)
193642.2 C (108.0 F)
193743.3 C (109.9 F)
193840.6 C (105.1 F)
193941.1 C (106.0 F)
194041.1 C (106.0 F)
194139.4 C (102.9 F)
194242.2 C (108.0 F)
194340.6 C (105.1 F)
194443.3 C (109.9 F)
194540.0 C (104.0 F)
194644.4 C (111.9 F)
194740.0 C (104.0 F)
194841.7 C (107.1 F)
194941.7 C (107.1 F)
195046.1 C (115.0 F)
195141.7 C (107.1 F)
195243.9 C (111.0 F)
195341.1 C (106.0 F)
195442.2 C (108.0 F)
195545.0 C (113.0 F)
195641.1 C (106.0 F)
195742.8 C (109.0 F)
195840.6 C (105.1 F)
195943.3 C (109.9 F)
196042.8 C (109.0 F)
196145.0 C (113.0 F)
196239.4 C (102.9 F)
196340.6 C (105.1 F)
196440.6 C (105.1 F)
196537.8 C (100.0 F)
196641.7 C (107.1 F)
196742.2 C (108.0 F)
196840.6 C (105.1 F)
196940.6 C (105.1 F)
197041.7 C (107.1 F)
197142.8 C (109.0 F)
197244.4 C (111.9 F)
197342.2 C (108.0 F)
197441.1 C (106.0 F)
197543.3 C (109.9 F)
197641.7 C (107.1 F)
197741.7 C (107.1 F)
197842.2 C (108.0 F)
197941.7 C (107.1 F)
198043.9 C (111.0 F)
198142.8 C (109.0 F)
198239.4 C (102.9 F)
198341.1 C (106.0 F)
198441.7 C (107.1 F)
198540.6 C (105.1 F)
198637.8 C (100.0 F)
198739.4 C (102.9 F)
198843.3 C (109.9 F)
198941.1 C (106.0 F)
199040.6 C (105.1 F)
199141.7 C (107.1 F)
199240.0 C (104.0 F)
199341.7 C (107.1 F)
199438.9 C (102.0 F)
199540.0 C (104.0 F)
199641.1 C (106.0 F)
199740.6 C (105.1 F)
199843.3 C (109.9 F)
199941.1 C (106.0 F)
200041.1 C (106.0 F)
200142.8 C (109.0 F)
200242.8 C (109.0 F)
200341.1 C (106.0 F)
200440.0 C (104.0 F)
200540.0 C (104.0 F)
200644.4 C (111.9 F)
200742.2 C (108.0 F)
200843.3 C (109.9 F)
200942.8 C (109.0 F)
201040.6 C (105.1 F)
201138.9 C (102.0 F)
201240.6 C (105.1 F)
201341.7 C (107.1 F)
201440.6 C (105.1 F)
201541.1 C (106.0 F)
201640.6 C (105.1 F)
201742.8 C (109.0 F)
201838.9 C (102.0 F)
201940.6 C (105.1 F)
202038.3 C (100.9 F)
202141.1 C (106.0 F)
202246.7 C (116.1 F)
202341.7 C (107.1 F)
202443.9 C (111.0 F)
202539.4 C (102.9 F)
202640.0 C (104.0 F)

Coldest night (TNn)

Coldest night (TNn) at Livermore by year The coldest night of the year at Livermore, 1903 to 2026. The record is -7.8 C (18.0 F) in 1961, marked on the chart; the median year is -3.9 C (25.0 F). -8-6-4-20192019401960198020002020Record: -7.8 C (18.0 F) in 1961
The coldest night of the year at Livermore, 1903 to 2026. The record is -7.8 C (18.0 F) in 1961, marked on the chart; the median year is -3.9 C (25.0 F).
Coldest night (TNn) at Livermore by year
YearColdest night (TNn)
1903-5.0 C (23.0 F)
1904-3.3 C (26.1 F)
1905-4.4 C (24.1 F)
1906-5.0 C (23.0 F)
1907-2.8 C (27.0 F)
1908-3.9 C (25.0 F)
1909-5.0 C (23.0 F)
1910-3.3 C (26.1 F)
1911-4.4 C (24.1 F)
1912-4.4 C (24.1 F)
1913-4.4 C (24.1 F)
1914-2.2 C (28.0 F)
1915-6.1 C (21.0 F)
1916-3.3 C (26.1 F)
1917-5.6 C (21.9 F)
1918-3.9 C (25.0 F)
1919-7.2 C (19.0 F)
1920-3.3 C (26.1 F)
1921-2.8 C (27.0 F)
1922-6.7 C (19.9 F)
1923-5.0 C (23.0 F)
1924-5.6 C (21.9 F)
1925-2.8 C (27.0 F)
1926-6.1 C (21.0 F)
1927-3.9 C (25.0 F)
1928-5.0 C (23.0 F)
1929-4.4 C (24.1 F)
1930-5.6 C (21.9 F)
1931-2.2 C (28.0 F)
1932-6.7 C (19.9 F)
1933-5.0 C (23.0 F)
1934-1.7 C (28.9 F)
1935-3.9 C (25.0 F)
1936-3.3 C (26.1 F)
1937-7.2 C (19.0 F)
1938-3.3 C (26.1 F)
1939-3.3 C (26.1 F)
1940-4.4 C (24.1 F)
1941-3.9 C (25.0 F)
1942-6.1 C (21.0 F)
1943-6.1 C (21.0 F)
1944-1.7 C (28.9 F)
1945-4.4 C (24.1 F)
1946-3.9 C (25.0 F)
1947-5.0 C (23.0 F)
1948-5.6 C (21.9 F)
1949-7.2 C (19.0 F)
1950-6.7 C (19.9 F)
1951-3.9 C (25.0 F)
1952-4.4 C (24.1 F)
1953-3.9 C (25.0 F)
1954-3.9 C (25.0 F)
1955-3.9 C (25.0 F)
1956-3.9 C (25.0 F)
1957-3.9 C (25.0 F)
1958-2.8 C (27.0 F)
1959-3.9 C (25.0 F)
1960-6.1 C (21.0 F)
1961-7.8 C (18.0 F)
1962-5.6 C (21.9 F)
1963-6.7 C (19.9 F)
1964-5.6 C (21.9 F)
1965-5.6 C (21.9 F)
1966-3.9 C (25.0 F)
1967-3.9 C (25.0 F)
1968-6.7 C (19.9 F)
1969-4.4 C (24.1 F)
1970-5.6 C (21.9 F)
1971-5.6 C (21.9 F)
1972-7.8 C (18.0 F)
1973-6.7 C (19.9 F)
1974-4.4 C (24.1 F)
1975-5.6 C (21.9 F)
1976-6.7 C (19.9 F)
1977-2.8 C (27.0 F)
1978-6.7 C (19.9 F)
1979-4.4 C (24.1 F)
1980-3.3 C (26.1 F)
1981-2.2 C (28.0 F)
1982-3.3 C (26.1 F)
1983-3.9 C (25.0 F)
1984-3.3 C (26.1 F)
1985-3.9 C (25.0 F)
1986-2.2 C (28.0 F)
1987-3.9 C (25.0 F)
1988-3.3 C (26.1 F)
1989-4.4 C (24.1 F)
1990-7.8 C (18.0 F)
1991-2.2 C (28.0 F)
1992-2.2 C (28.0 F)
1993-3.9 C (25.0 F)
1994-3.3 C (26.1 F)
1995-1.1 C (30.0 F)
1996-1.7 C (28.9 F)
1997-3.3 C (26.1 F)
1998-5.0 C (23.0 F)
1999-4.4 C (24.1 F)
2000-1.1 C (30.0 F)
2001-1.7 C (28.9 F)
2002-3.3 C (26.1 F)
2003-2.2 C (28.0 F)
2004-2.8 C (27.0 F)
2005-1.1 C (30.0 F)
2006-2.8 C (27.0 F)
2007-5.6 C (21.9 F)
2008-2.2 C (28.0 F)
2009-3.3 C (26.1 F)
2010-2.2 C (28.0 F)
2011-2.8 C (27.0 F)
2012-3.9 C (25.0 F)
2013-3.9 C (25.0 F)
2014-0.6 C (30.9 F)
2015-3.9 C (25.0 F)
2016-2.8 C (27.0 F)
2017-2.2 C (28.0 F)
2018-2.8 C (27.0 F)
2019-2.8 C (27.0 F)
2020-1.7 C (28.9 F)
2021-2.2 C (28.0 F)
2022-3.9 C (25.0 F)
2023-2.8 C (27.0 F)
2024-2.2 C (28.0 F)
2025-3.3 C (26.1 F)
2026-1.1 C (30.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Livermore by year The wettest day of the year at Livermore, 1903 to 2026. The record is 100.8 mm (4.0 in) in 1918, marked on the chart; the median year is 33.1 mm (1.3 in). 0255075100125192019401960198020002020Record: 100.8 mm (4.0 in) in 1918
The wettest day of the year at Livermore, 1903 to 2026. The record is 100.8 mm (4.0 in) in 1918, marked on the chart; the median year is 33.1 mm (1.3 in).
Wettest day (Rx1day) at Livermore by year
YearWettest day (Rx1day)
190334.8 mm (1.4 in)
190426.7 mm (1.1 in)
190522.9 mm (0.9 in)
190666.0 mm (2.6 in)
190742.7 mm (1.7 in)
190816.5 mm (0.6 in)
190969.1 mm (2.7 in)
191020.1 mm (0.8 in)
191164.5 mm (2.5 in)
191225.9 mm (1.0 in)
191321.6 mm (0.9 in)
191432.8 mm (1.3 in)
191549.5 mm (1.9 in)
191677.0 mm (3.0 in)
191725.4 mm (1.0 in)
1918100.8 mm (4.0 in)
191930.5 mm (1.2 in)
192023.6 mm (0.9 in)
192119.6 mm (0.8 in)
192241.4 mm (1.6 in)
192316.0 mm (0.6 in)
192436.3 mm (1.4 in)
192521.6 mm (0.9 in)
192621.3 mm (0.8 in)
192725.4 mm (1.0 in)
192824.1 mm (0.9 in)
192922.9 mm (0.9 in)
193022.9 mm (0.9 in)
193138.1 mm (1.5 in)
193222.6 mm (0.9 in)
193329.7 mm (1.2 in)
193427.2 mm (1.1 in)
193523.4 mm (0.9 in)
193631.0 mm (1.2 in)
193750.8 mm (2.0 in)
193834.3 mm (1.4 in)
193930.0 mm (1.2 in)
194034.3 mm (1.4 in)
194126.4 mm (1.0 in)
194231.5 mm (1.2 in)
194348.5 mm (1.9 in)
194434.5 mm (1.4 in)
194536.6 mm (1.4 in)
194648.0 mm (1.9 in)
194723.1 mm (0.9 in)
194827.7 mm (1.1 in)
194921.6 mm (0.9 in)
195077.5 mm (3.1 in)
195131.0 mm (1.2 in)
195287.6 mm (3.4 in)
195325.9 mm (1.0 in)
195429.7 mm (1.2 in)
195582.8 mm (3.3 in)
195620.3 mm (0.8 in)
195721.8 mm (0.9 in)
195845.7 mm (1.8 in)
195938.9 mm (1.5 in)
196029.7 mm (1.2 in)
196133.3 mm (1.3 in)
196255.1 mm (2.2 in)
196374.4 mm (2.9 in)
196443.7 mm (1.7 in)
196533.5 mm (1.3 in)
196624.1 mm (0.9 in)
196750.3 mm (2.0 in)
196864.0 mm (2.5 in)
196939.4 mm (1.6 in)
197049.5 mm (1.9 in)
197123.9 mm (0.9 in)
197220.8 mm (0.8 in)
197334.0 mm (1.3 in)
197423.4 mm (0.9 in)
197526.2 mm (1.0 in)
197620.1 mm (0.8 in)
197723.1 mm (0.9 in)
197829.2 mm (1.1 in)
197931.2 mm (1.2 in)
198031.8 mm (1.3 in)
198141.1 mm (1.6 in)
198245.5 mm (1.8 in)
198341.1 mm (1.6 in)
198424.1 mm (0.9 in)
198529.5 mm (1.2 in)
198649.5 mm (1.9 in)
198729.5 mm (1.2 in)
198822.4 mm (0.9 in)
198925.4 mm (1.0 in)
199030.0 mm (1.2 in)
199141.9 mm (1.6 in)
199222.1 mm (0.9 in)
199334.0 mm (1.3 in)
199418.8 mm (0.7 in)
199558.2 mm (2.3 in)
199649.0 mm (1.9 in)
199740.4 mm (1.6 in)
199842.4 mm (1.7 in)
199921.6 mm (0.9 in)
200046.7 mm (1.8 in)
200120.8 mm (0.8 in)
200253.1 mm (2.1 in)
200327.4 mm (1.1 in)
200441.1 mm (1.6 in)
200548.5 mm (1.9 in)
200626.9 mm (1.1 in)
200719.8 mm (0.8 in)
200849.8 mm (2.0 in)
200956.1 mm (2.2 in)
201034.5 mm (1.4 in)
201122.6 mm (0.9 in)
201242.7 mm (1.7 in)
201326.7 mm (1.1 in)
201443.4 mm (1.7 in)
201538.1 mm (1.5 in)
201636.3 mm (1.4 in)
201742.9 mm (1.7 in)
201827.4 mm (1.1 in)
201934.3 mm (1.4 in)
202036.8 mm (1.4 in)
202177.5 mm (3.1 in)
202234.5 mm (1.4 in)
202398.6 mm (3.9 in)
202430.0 mm (1.2 in)
202543.7 mm (1.7 in)
202633.5 mm (1.3 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Livermore by year The wettest five days of the year at Livermore, 1903 to 2026. The record is 195.1 mm (7.7 in) in 1911, marked on the chart; the median year is 61.8 mm (2.4 in). 050100150200192019401960198020002020Record: 195.1 mm (7.7 in) in 1911
The wettest five days of the year at Livermore, 1903 to 2026. The record is 195.1 mm (7.7 in) in 1911, marked on the chart; the median year is 61.8 mm (2.4 in).
Wettest five days (Rx5day) at Livermore by year
YearWettest five days (Rx5day)
190393.6 mm (3.7 in)
190444.3 mm (1.7 in)
190554.2 mm (2.1 in)
1906112.8 mm (4.4 in)
190783.6 mm (3.3 in)
190835.9 mm (1.4 in)
190998.8 mm (3.9 in)
191047.2 mm (1.9 in)
1911195.1 mm (7.7 in)
191234.5 mm (1.4 in)
191357.1 mm (2.2 in)
191471.1 mm (2.8 in)
191555.1 mm (2.2 in)
191697.8 mm (3.9 in)
191766.5 mm (2.6 in)
1918138.7 mm (5.5 in)
191969.4 mm (2.7 in)
192037.1 mm (1.5 in)
192159.2 mm (2.3 in)
192290.7 mm (3.6 in)
192335.8 mm (1.4 in)
192438.6 mm (1.5 in)
192543.8 mm (1.7 in)
192675.9 mm (3.0 in)
192749.5 mm (1.9 in)
192873.7 mm (2.9 in)
192937.7 mm (1.5 in)
193043.8 mm (1.7 in)
193192.5 mm (3.6 in)
193267.8 mm (2.7 in)
193357.4 mm (2.3 in)
193462.8 mm (2.5 in)
193544.2 mm (1.7 in)
193667.0 mm (2.6 in)
1937110.3 mm (4.3 in)
193877.9 mm (3.1 in)
193948.9 mm (1.9 in)
194074.4 mm (2.9 in)
194153.1 mm (2.1 in)
194278.4 mm (3.1 in)
194396.5 mm (3.8 in)
194451.8 mm (2.0 in)
194589.4 mm (3.5 in)
194669.4 mm (2.7 in)
194731.6 mm (1.2 in)
194836.6 mm (1.4 in)
194940.2 mm (1.6 in)
1950135.6 mm (5.3 in)
195176.6 mm (3.0 in)
1952121.6 mm (4.8 in)
195328.5 mm (1.1 in)
195452.8 mm (2.1 in)
1955171.7 mm (6.8 in)
195646.5 mm (1.8 in)
195730.8 mm (1.2 in)
195877.7 mm (3.1 in)
195948.0 mm (1.9 in)
196056.2 mm (2.2 in)
196144.4 mm (1.7 in)
196292.5 mm (3.6 in)
1963110.0 mm (4.3 in)
196466.6 mm (2.6 in)
196560.9 mm (2.4 in)
196662.2 mm (2.4 in)
1967110.7 mm (4.4 in)
196868.1 mm (2.7 in)
196980.8 mm (3.2 in)
1970112.7 mm (4.4 in)
197155.7 mm (2.2 in)
197255.3 mm (2.2 in)
197358.4 mm (2.3 in)
197435.4 mm (1.4 in)
197548.0 mm (1.9 in)
197636.6 mm (1.4 in)
197739.9 mm (1.6 in)
197860.9 mm (2.4 in)
197970.5 mm (2.8 in)
198089.0 mm (3.5 in)
198184.8 mm (3.3 in)
1982101.3 mm (4.0 in)
198386.1 mm (3.4 in)
198438.8 mm (1.5 in)
198547.7 mm (1.9 in)
1986126.4 mm (5.0 in)
198763.8 mm (2.5 in)
198838.4 mm (1.5 in)
198928.2 mm (1.1 in)
199038.1 mm (1.5 in)
199165.1 mm (2.6 in)
199272.8 mm (2.9 in)
199367.6 mm (2.7 in)
199451.1 mm (2.0 in)
1995106.7 mm (4.2 in)
199667.1 mm (2.6 in)
199761.3 mm (2.4 in)
199885.1 mm (3.4 in)
199947.7 mm (1.9 in)
200076.0 mm (3.0 in)
200155.1 mm (2.2 in)
2002109.2 mm (4.3 in)
200338.6 mm (1.5 in)
200464.7 mm (2.5 in)
200560.2 mm (2.4 in)
200677.4 mm (3.0 in)
200743.4 mm (1.7 in)
200873.5 mm (2.9 in)
200956.9 mm (2.2 in)
201059.9 mm (2.4 in)
201151.2 mm (2.0 in)
201280.8 mm (3.2 in)
201333.0 mm (1.3 in)
2014110.5 mm (4.4 in)
201541.2 mm (1.6 in)
201650.4 mm (2.0 in)
201784.1 mm (3.3 in)
201854.9 mm (2.2 in)
201972.2 mm (2.8 in)
202061.4 mm (2.4 in)
2021100.6 mm (4.0 in)
202246.7 mm (1.8 in)
2023133.4 mm (5.3 in)
202451.6 mm (2.0 in)
202551.8 mm (2.0 in)
202681.3 mm (3.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Livermore by year The longest dry spell of the year at Livermore, 1903 to 2026. The record is 206 days in 1917, marked on the chart; the median year is 121 days. 050100150200250192019401960198020002020Record: 206 days in 1917
The longest dry spell of the year at Livermore, 1903 to 2026. The record is 206 days in 1917, marked on the chart; the median year is 121 days.
Longest dry spell (CDD) at Livermore by year
YearLongest dry spell (CDD)
1903166 days
1904113 days
1905176 days
190698 days
190779 days
1908149 days
190999 days
191091 days
1911123 days
191270 days
191398 days
191477 days
191599 days
1916137 days
1917206 days
1918103 days
1919182 days
1920113 days
1921146 days
1922145 days
1923157 days
1924145 days
1925165 days
1926146 days
1927140 days
1928187 days
1929176 days
1930144 days
1931128 days
1932183 days
1933175 days
1934108 days
1935118 days
1936144 days
1937107 days
1938154 days
1939114 days
1940109 days
1941159 days
1942105 days
1943121 days
1944141 days
1945149 days
1946109 days
1947121 days
1948118 days
1949101 days
195062 days
195139 days
195262 days
195339 days
195489 days
195597 days
1956116 days
195798 days
1958126 days
1959103 days
1960134 days
196170 days
1962165 days
1963123 days
196482 days
1965112 days
196653 days
1967119 days
1968150 days
1969163 days
1970132 days
1971144 days
197268 days
1973159 days
1974166 days
197560 days
197664 days
197778 days
1978200 days
197984 days
1980128 days
1981129 days
198275 days
1983105 days
1984163 days
198597 days
1986135 days
1987118 days
1988128 days
1989103 days
1990114 days
199146 days
1992112 days
1993121 days
1994120 days
1995177 days
1996160 days
199775 days
199893 days
1999141 days
200084 days
200190 days
2002169 days
2003110 days
2004113 days
2005123 days
2006131 days
2007140 days
2008188 days
200999 days
2010144 days
201196 days
2012139 days
2013127 days
2014151 days
2015111 days
2016160 days
2017182 days
2018169 days
2019117 days
202040 days
2021175 days
2022149 days
2023186 days
2024190 days
2025118 days
202698 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

97 years with a frost

Across 97 years with a frost, the median last spring frost at Livermore falls on 13 March and the median first autumn frost on 23 November, which leaves a median of 252 days between them.

In 1989 to 2025 the median growing season was 287 days. That is 50 days more than in 1903 to 1943.

Fitted over all years, the growing season changes by +5.3 days per decade at this station.

Frost dates and growing season at Livermore
MeasureMedian, all yearsEarliest period (1903 to 1943)Recent period (1989 to 2025)Recent against earliestFitted trend
Last spring frost13 March26 March21 February33 days earlier-3.4 days per decade
First autumn frost23 November17 November5 December18 days later+1.9 days per decade
Growing days252 days237 days287 days50 days more+5.3 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

120 years, 1903 to 2025

A day with at least 32.7 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 107.1 mm (4.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Livermore: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years32.7 mm (1.3 in)
5 years46.8 mm (1.8 in)
10 years58.1 mm (2.3 in)
25 years75.1 mm (3.0 in)
50 years90.0 mm (3.5 in)
100 years107.1 mm (4.2 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 120 years of values from 1903 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 100.8 mm (4.0 in) in 1918; 98.6 mm (3.9 in) in 2023; 87.6 mm (3.4 in) in 1952.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Livermore, at 2015. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 2015 ran 0.5 C (0.8 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Livermore, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
2015-0.4-0.8possible5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Climate Twins

2010 to 2025 against 1961 to 1990

Over 2010 to 2025, Livermore had a mean temperature of 16.2 C (61.2 F) and 358.1 mm (14.1 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Cagliari (Italy, 10,096 km away), Castellon (Spain, 9,545 km away) and Barrett Dam (United States, 723 km away).

Climate twins of Livermore: stations whose 1961 to 1990 climate is closest to its 2010 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
CagliariItaly10,096 km (6,273 mi)16.4 C (61.6 F)428.4 mm (16.9 in)0.97
CastellonSpain9,545 km (5,931 mi)16.7 C (62.1 F)477.7 mm (18.8 in)0.99
Barrett DamUnited States723 km (449 mi)16.0 C (60.8 F)433.9 mm (17.1 in)1.02

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

  • Data for Livermore standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Livermore threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-14).