Built 2026-10-16 (16 October 2026)

Sonora Weather Records (USC00048353)

Record envelope, standing records and threshold days for Sonora (USC00048353), California, United States, with 124 years of record.

Key Facts for Sonora

  • Sonora (USC00048353) is a weather station in California, United States at 37.97 latitude and -120.39 longitude, 511 m (1,675 ft) above sea level.
  • The station reports from 1903 to 2026, 124 years of record.
  • 1,464 records set at Sonora still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Sonora set a daily record high minimum temperature of 20.0 C (68.0 F) on 9 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, 37.97 latitude, -120.39 longitude.
  • Elevation: 511 m (1,675 ft).
  • Period of record: 1903 to 2026, 124 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

36 days at or beyond a record
Daily record high and record low at Sonora, with 2026 drawn through them The band shows the record high and record low for each calendar day at Sonora. The lines show the 2026 daily maximum and minimum. 36 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 Sonora. The lines show the 2026 daily maximum and minimum. 36 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Sonora, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan23.9 C (75.0 F)-10.6 C (12.9 F)21.7 C (71.1 F)-2.8 C (27.0 F)
Feb25.6 C (78.1 F)-9.4 C (15.1 F)24.4 C (75.9 F)-1.7 C (28.9 F)
Mar30.6 C (87.1 F)-6.7 C (19.9 F)30.6 C (87.1 F)0.0 C (32.0 F)
Apr33.3 C (91.9 F)-4.4 C (24.1 F)26.1 C (79.0 F)-3.9 C (25.0 F)
May39.4 C (102.9 F)-4.4 C (24.1 F)32.2 C (90.0 F)4.4 C (39.9 F)
Jun45.0 C (113.0 F)1.1 C (34.0 F)34.4 C (93.9 F)n/a
Jul45.0 C (113.0 F)1.7 C (35.1 F)35.6 C (96.1 F)1.7 C (35.1 F)
Aug43.3 C (109.9 F)3.3 C (37.9 F)37.8 C (100.0 F)3.3 C (37.9 F)
Sep43.3 C (109.9 F)1.7 C (35.1 F)35.6 C (96.1 F)0.6 C (33.1 F)
Oct37.8 C (100.0 F)-3.9 C (25.0 F)33.3 C (91.9 F)8.3 C (46.9 F)
Nov31.7 C (89.1 F)-6.1 C (21.0 F)n/an/a
Dec27.2 C (81.0 F)-13.3 C (8.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Sonora by the year they were set 1,464 records at Sonora still stand. 1972 holds the most, with 30. 01020301906: 91907: 71908: 71909: 131910: 121911: 91912: 81913: 71914: 51915: 71916: 101917: 201918: 131919: 71920: 281921: 71922: 141923: 141924: 161925: 151926: 151927: 121928: 31929: 101930: 91931: 161932: 91933: 201934: 211935: 141936: 161937: 111938: 71939: 231940: 121941: 61942: 61943: 131944: 121945: 101946: 41947: 81948: 111949: 231950: 221951: 51952: 181953: 81954: 101955: 121956: 151957: 41958: 151959: 141960: 201961: 251962: 201963: 181964: 261965: 161966: 161967: 171968: 151969: 121970: 91971: 221972: 301973: 171974: 101975: 171976: 151977: 141978: 141979: 51980: 121981: 61982: 141983: 81984: 151985: 281986: 231987: 251988: 111989: 101990: 171991: 121992: 31993: 51994: 121995: 71996: 91997: 61998: 111999: 142000: 112001: 32002: 62003: 72004: 72005: 42006: 52007: 112008: 112009: 102010: 122011: 82012: 82013: 72014: 32015: 62016: 42017: 82018: 82019: 42020: 52021: 72022: 192023: 182024: 102025: 62026: 281906191919321945195819711984199720102023
1,464 records at Sonora still stand. 1972 holds the most, with 30.
Standing records at Sonora by the year they were set
Year setStanding records
19069
19077
19087
190913
191012
19119
19128
19137
19145
19157
191610
191720
191813
19197
192028
19217
192214
192314
192416
192515
192615
192712
19283
192910
19309
193116
19329
193320
193421
193514
193616
193711
19387
193923
194012
19416
19426
194313
194412
194510
19464
19478
194811
194923
195022
19515
195218
19538
195410
195512
195615
19574
195815
195914
196020
196125
196220
196318
196426
196516
196616
196717
196815
196912
19709
197122
197230
197317
197410
197517
197615
197714
197814
19795
198012
19816
198214
19838
198415
198528
198623
198725
198811
198910
199017
199112
19923
19935
199412
19957
19969
19976
199811
199914
200011
20013
20026
20037
20047
20054
20065
200711
200811
200910
201012
20118
20128
20137
20143
20156
20164
20178
20188
20194
20205
20217
202219
202318
202410
20256
202628

All-Time Record Progression

5 new records
When Sonora set new all-time records 5 all-time records were set at Sonora between 25 January 1949 and 9 December 1972. Each dot is a new record. Record low minimum temperatureRecord high maximum temperatureRecord low maximum temperature25 January 1949: Record low minimum temperature -10.6 C (12.9 F)20 July 1960: Record high maximum temperature 44.4 C (111.9 F)22 June 1961: Record high maximum temperature 45.0 C (113.0 F)30 January 1969: Record low maximum temperature 0.6 C (33.1 F)9 December 1972: Record low minimum temperature -13.3 C (8.1 F)19501955196019651970
5 all-time records were set at Sonora between 25 January 1949 and 9 December 1972. Each dot is a new record.
When Sonora set new all-time records
DateKindDetail
1949-01-25Record low minimum temperatureRecord low minimum temperature -10.6 C (12.9 F)
1960-07-20Record high maximum temperatureRecord high maximum temperature 44.4 C (111.9 F)
1961-06-22Record high maximum temperatureRecord high maximum temperature 45.0 C (113.0 F)
1969-01-30Record low maximum temperatureRecord low maximum temperature 0.6 C (33.1 F)
1972-12-09Record low minimum temperatureRecord low minimum temperature -13.3 C (8.1 F)

Wettest Day of Each Month

Dec: 137.7 mm (5.4 in)
Record daily precipitation for each month at Sonora The wettest day on record for each calendar month at Sonora. The most was 137.7 mm (5.4 in) on 11 December 1906. 050100150 Jan: 104.1 mm (4.1 in), 13 January 1909 Jan Feb: 127.8 mm (5.0 in), 15 February 1982 Feb Mar: 102.9 mm (4.1 in), 11 March 1995 Mar Apr: 85.9 mm (3.4 in), 4 April 2006 Apr May: 86.6 mm (3.4 in), 19 May 1957 May Jun: 44.7 mm (1.8 in), 16 June 1995 Jun Jul: 22.1 mm (0.9 in), 10 July 1974 Jul Aug: 33.0 mm (1.3 in), 15 August 1976 Aug Sep: 108.0 mm (4.3 in), 19 September 1959 Sep Oct: 83.3 mm (3.3 in), 25 October 2021 Oct Nov: 124.5 mm (4.9 in), 30 November 1919 Nov Dec: 137.7 mm (5.4 in), 11 December 1906 Dec
The wettest day on record for each calendar month at Sonora. The most was 137.7 mm (5.4 in) on 11 December 1906.
Record daily precipitation for each month at Sonora
MonthRecord daily precipitation (mm)Date
Jan104.1 mm (4.1 in)13 January 1909
Feb127.8 mm (5.0 in)15 February 1982
Mar102.9 mm (4.1 in)11 March 1995
Apr85.9 mm (3.4 in)4 April 2006
May86.6 mm (3.4 in)19 May 1957
Jun44.7 mm (1.8 in)16 June 1995
Jul22.1 mm (0.9 in)10 July 1974
Aug33.0 mm (1.3 in)15 August 1976
Sep108.0 mm (4.3 in)19 September 1959
Oct83.3 mm (3.3 in)25 October 2021
Nov124.5 mm (4.9 in)30 November 1919
Dec137.7 mm (5.4 in)11 December 1906

Period of Record Coverage

1906 to 2026
Days with data per year at Sonora 121 years of record at Sonora, 1906 to 2026. 45 years have data for under 90 percent of days and are left out of rankings: 1906, 1907, 1908, 1915, 1917, 1919, 1920, 1935 and others. 1906: 128 of 365 days1907: 212 of 365 days1908: 268 of 366 days1909: 365 of 365 days1910: 352 of 365 days1911: 364 of 365 days1912: 358 of 366 days1913: 352 of 365 days1914: 338 of 365 days1915: 239 of 365 days1916: 337 of 366 days1917: 163 of 365 days1918: 330 of 365 days1919: 298 of 365 days1920: 261 of 366 days1921: 333 of 365 days1922: 364 of 365 days1923: 357 of 365 days1924: 363 of 366 days1925: 365 of 365 days1926: 365 of 365 days1927: 365 of 365 days1928: 366 of 366 days1929: 365 of 365 days1930: 365 of 365 days1931: 353 of 365 days1932: 365 of 366 days1933: 365 of 365 days1934: 365 of 365 days1935: 319 of 365 days1936: 366 of 366 days1937: 365 of 365 days1938: 365 of 365 days1939: 365 of 365 days1940: 366 of 366 days1941: 334 of 365 days1942: 365 of 365 days1943: 351 of 365 days1944: 305 of 366 days1945: 304 of 365 days1946: 303 of 365 days1947: 304 of 365 days1948: 304 of 366 days1949: 305 of 365 days1950: 303 of 365 days1951: 305 of 365 days1952: 303 of 366 days1953: 300 of 365 days1954: 251 of 365 days1955: 251 of 365 days1956: 363 of 366 days1957: 334 of 365 days1958: 349 of 365 days1959: 354 of 365 days1960: 366 of 366 days1961: 361 of 365 days1962: 364 of 365 days1963: 364 of 365 days1964: 331 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 336 of 366 days1969: 362 of 365 days1970: 363 of 365 days1971: 351 of 365 days1972: 359 of 366 days1973: 332 of 365 days1974: 361 of 365 days1975: 360 of 365 days1976: 366 of 366 days1977: 318 of 365 days1978: 297 of 365 days1979: 275 of 365 days1980: 287 of 366 days1981: 290 of 365 days1982: 281 of 365 days1983: 293 of 365 days1984: 289 of 366 days1985: 285 of 365 days1986: 297 of 365 days1987: 277 of 365 days1988: 276 of 366 days1989: 272 of 365 days1990: 295 of 365 days1991: 270 of 365 days1992: 343 of 366 days1993: 363 of 365 days1994: 335 of 365 days1995: 211 of 365 days1996: 245 of 366 days1997: 304 of 365 days1998: 192 of 365 days1999: 333 of 365 days2000: 336 of 366 days2001: 363 of 365 days2002: 365 of 365 days2003: 362 of 365 days2004: 362 of 366 days2005: 353 of 365 days2006: 352 of 365 days2007: 317 of 365 days2008: 326 of 366 days2009: 363 of 365 days2010: 354 of 365 days2011: 361 of 365 days2012: 362 of 366 days2013: 361 of 365 days2014: 361 of 365 days2015: 353 of 365 days2016: 355 of 366 days2017: 350 of 365 days2018: 348 of 365 days2019: 333 of 365 days2020: 356 of 366 days2021: 343 of 365 days2022: 241 of 365 days2023: 298 of 365 days2024: 294 of 366 days2025: 331 of 365 days2026: 256 of 365 days192019401960198020002020
121 years of record at Sonora, 1906 to 2026. 45 years have data for under 90 percent of days and are left out of rankings: 1906, 1907, 1908, 1915, 1917, 1919, 1920, 1935 and others.
Days with data per year at Sonora
YearDays with dataShare of yearComplete
190612835%No
190721258%No
190826873%No
1909365100%Yes
191035296%Yes
1911364100%Yes
191235898%Yes
191335296%Yes
191433893%Yes
191523965%No
191633792%Yes
191716345%No
191833090%Yes
191929882%No
192026171%No
192133391%Yes
1922364100%Yes
192335798%Yes
192436399%Yes
1925365100%Yes
1926365100%Yes
1927365100%Yes
1928366100%Yes
1929365100%Yes
1930365100%Yes
193135397%Yes
1932365100%Yes
1933365100%Yes
1934365100%Yes
193531987%No
1936366100%Yes
1937365100%Yes
1938365100%Yes
1939365100%Yes
1940366100%Yes
194133492%Yes
1942365100%Yes
194335196%Yes
194430583%No
194530483%No
194630383%No
194730483%No
194830483%No
194930584%No
195030383%No
195130584%No
195230383%No
195330082%No
195425169%No
195525169%No
195636399%Yes
195733492%Yes
195834996%Yes
195935497%Yes
1960366100%Yes
196136199%Yes
1962364100%Yes
1963364100%Yes
196433190%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
196833692%Yes
196936299%Yes
197036399%Yes
197135196%Yes
197235998%Yes
197333291%Yes
197436199%Yes
197536099%Yes
1976366100%Yes
197731887%No
197829781%No
197927575%No
198028778%No
198129079%No
198228177%No
198329380%No
198428979%No
198528578%No
198629781%No
198727776%No
198827675%No
198927275%No
199029581%No
199127074%No
199234394%Yes
199336399%Yes
199433592%Yes
199521158%No
199624567%No
199730483%No
199819253%No
199933391%Yes
200033692%Yes
200136399%Yes
2002365100%Yes
200336299%Yes
200436299%Yes
200535397%Yes
200635296%Yes
200731787%No
200832689%No
200936399%Yes
201035497%Yes
201136199%Yes
201236299%Yes
201336199%Yes
201436199%Yes
201535397%Yes
201635597%Yes
201735096%Yes
201834895%Yes
201933391%Yes
202035697%Yes
202134394%Yes
202224166%No
202329882%No
202429480%No
202533191%Yes
202625670%No

Latest Records

20
Latest records at Sonora
DateStationRecordValueBeat old record byOld record stoodSignificance
9 October 2026Sonora, USdaily high min (Provisional)20.0 C (68.0 F)5.6 C (10.1 F)92 years53 of 100 (Notable)
8 October 2026Sonora, USdaily high min (Provisional)16.7 C (62.1 F)2.3 C (4.1 F)80 years40 of 100 (Notable)
6 October 2026Sonora, USdaily high min (Provisional)18.9 C (66.0 F)2.2 C (4.0 F)92 years43 of 100 (Notable)
5 October 2026Sonora, USdaily high min (Provisional)20.0 C (68.0 F)5.6 C (10.1 F)96 years55 of 100 (Notable)
4 October 2026Sonora, USmonthly high min (Provisional)22.2 C (72.0 F)3.3 C (5.9 F)0 years30 of 100 (Routine)
2 October 2026Sonora, USmonthly high min (Provisional)18.9 C (66.0 F)1.1 C (2.0 F)104 years53 of 100 (Notable)
22 September 2026Sonora, USdaily low min (Tie, Provisional)2.8 C (37.0 F)tie9 years3 of 100 (Routine)
21 September 2026Sonora, USdaily low min (Provisional)2.8 C (37.0 F)0.5 C (0.9 F)21 years17 of 100 (Routine)
20 September 2026Sonora, USdaily low min (Provisional)2.8 C (37.0 F)0.5 C (0.9 F)56 years27 of 100 (Routine)
19 September 2026Sonora, USdaily low min (Provisional)2.2 C (36.0 F)0.6 C (1.1 F)60 years29 of 100 (Routine)
18 September 2026Sonora, USmonthly low min (Provisional)0.6 C (33.1 F)0.5 C (0.9 F)0 years21 of 100 (Routine)
17 September 2026Sonora, USmonthly low min (Tie, Provisional)1.1 C (34.0 F)tie0 years5 of 100 (Routine)
16 September 2026Sonora, USmonthly low min (Provisional)1.1 C (34.0 F)0.6 C (1.1 F)105 years51 of 100 (Notable)
10 September 2026Sonora, USdaily high min (Provisional)20.6 C (69.1 F)0.6 C (1.1 F)103 years41 of 100 (Notable)
30 August 2026Sonora, USdaily low min (Provisional)5.6 C (42.1 F)0.5 C (0.9 F)60 years29 of 100 (Routine)
30 August 2026Sonora, USdaily low max (Tie, Provisional)23.3 C (73.9 F)tie16 years3 of 100 (Routine)
23 August 2026Sonora, USdaily high min (Tie, Provisional)21.1 C (70.0 F)tie87 years9 of 100 (Routine)
22 August 2026Sonora, USdaily high min (Provisional)20.6 C (69.1 F)0.6 C (1.1 F)91 years39 of 100 (Notable)
12 August 2026Sonora, USdaily low min (Tie)8.3 C (46.9 F)tie116 years10 of 100 (Routine)
2 August 2026Sonora, USdaily low min6.7 C (44.1 F)1.6 C (2.9 F)36 years26 of 100 (Routine)

Climate Trend

69 complete years, 1909 to 2025
Annual mean temperature at Sonora as warming stripes, 1909 to 2025 One stripe for each of 69 complete years at Sonora, 1909 to 2025. Blue stripes are years cooler than the station's own mean of 15.0 C (59.0 F); red stripes are warmer. The coolest year was 2011, at 13.1 C (55.6 F), and the warmest was 1934, at 16.9 C (62.4 F). The strongest colour marks a difference of 1.9 C (3.4 F). 1909: 14.7 C, -0.4 C from the station mean1911: 14.0 C, -1.0 C from the station mean1912: 13.9 C, -1.1 C from the station mean1913: 14.5 C, -0.5 C from the station mean1922: 15.3 C, +0.3 C from the station mean1923: 15.9 C, +0.9 C from the station mean1924: 16.6 C, +1.6 C from the station mean1925: 15.8 C, +0.8 C from the station mean1926: 16.8 C, +1.8 C from the station mean1927: 15.8 C, +0.8 C from the station mean1928: 16.1 C, +1.1 C from the station mean1929: 15.8 C, +0.8 C from the station mean1930: 15.4 C, +0.4 C from the station mean1931: 16.4 C, +1.4 C from the station mean1932: 15.7 C, +0.6 C from the station mean1933: 15.4 C, +0.4 C from the station mean1934: 16.9 C, +1.9 C from the station mean1936: 16.6 C, +1.6 C from the station mean1937: 15.8 C, +0.8 C from the station mean1938: 15.7 C, +0.7 C from the station mean1939: 16.2 C, +1.2 C from the station mean1940: 16.3 C, +1.3 C from the station mean1941: 15.4 C, +0.4 C from the station mean1942: 15.4 C, +0.4 C from the station mean1943: 15.7 C, +0.7 C from the station mean1944: 14.5 C, -0.5 C from the station mean1945: 14.8 C, -0.2 C from the station mean1946: 14.5 C, -0.6 C from the station mean1947: 14.9 C, -0.1 C from the station mean1948: 13.7 C, -1.3 C from the station mean1949: 14.6 C, -0.4 C from the station mean1950: 15.3 C, +0.3 C from the station mean1951: 14.9 C, -0.1 C from the station mean1952: 14.6 C, -0.4 C from the station mean1953: 14.5 C, -0.5 C from the station mean1956: 14.8 C, -0.2 C from the station mean1959: 16.5 C, +1.5 C from the station mean1960: 15.8 C, +0.7 C from the station mean1961: 15.8 C, +0.7 C from the station mean1962: 15.7 C, +0.7 C from the station mean1963: 14.8 C, -0.2 C from the station mean1965: 13.9 C, -1.1 C from the station mean1966: 14.9 C, -0.1 C from the station mean1967: 14.5 C, -0.5 C from the station mean1969: 14.2 C, -0.8 C from the station mean1970: 14.6 C, -0.4 C from the station mean1971: 13.4 C, -1.6 C from the station mean1972: 14.2 C, -0.9 C from the station mean1974: 14.2 C, -0.8 C from the station mean1975: 13.5 C, -1.5 C from the station mean1976: 14.2 C, -0.8 C from the station mean1993: 14.6 C, -0.4 C from the station mean2001: 14.5 C, -0.5 C from the station mean2004: 14.2 C, -0.8 C from the station mean2005: 14.2 C, -0.8 C from the station mean2006: 14.1 C, -0.9 C from the station mean2009: 14.1 C, -0.9 C from the station mean2010: 13.5 C, -1.5 C from the station mean2011: 13.1 C, -1.9 C from the station mean2012: 14.4 C, -0.6 C from the station mean2013: 14.2 C, -0.8 C from the station mean2014: 15.5 C, +0.5 C from the station mean2015: 15.0 C, 0.0 C from the station mean2016: 14.8 C, -0.2 C from the station mean2017: 15.3 C, +0.3 C from the station mean2018: 14.9 C, -0.1 C from the station mean2020: 15.4 C, +0.3 C from the station mean2021: 15.7 C, +0.7 C from the station mean2025: 14.5 C, -0.5 C from the station mean190919201930194019501960197019801990200020102020
One stripe for each of 69 complete years at Sonora, 1909 to 2025. Blue stripes are years cooler than the station's own mean of 15.0 C (59.0 F); red stripes are warmer. The coolest year was 2011, at 13.1 C (55.6 F), and the warmest was 1934, at 16.9 C (62.4 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Sonora as warming stripes, 1909 to 2025
YearAnnual mean temperatureDifference from the station mean
190914.7 C-0.35 C
191114.0 C-1.00 C
191213.9 C-1.09 C
191314.5 C-0.49 C
192215.3 C+0.28 C
192315.9 C+0.88 C
192416.6 C+1.59 C
192515.8 C+0.77 C
192616.8 C+1.79 C
192715.8 C+0.84 C
192816.1 C+1.10 C
192915.8 C+0.79 C
193015.4 C+0.42 C
193116.4 C+1.42 C
193215.7 C+0.65 C
193315.4 C+0.36 C
193416.9 C+1.88 C
193616.6 C+1.57 C
193715.8 C+0.84 C
193815.7 C+0.67 C
193916.2 C+1.23 C
194016.3 C+1.33 C
194115.4 C+0.41 C
194215.4 C+0.40 C
194315.7 C+0.71 C
194414.5 C-0.49 C
194514.8 C-0.16 C
194614.5 C-0.55 C
194714.9 C-0.10 C
194813.7 C-1.26 C
194914.6 C-0.41 C
195015.3 C+0.29 C
195114.9 C-0.14 C
195214.6 C-0.43 C
195314.5 C-0.47 C
195614.8 C-0.24 C
195916.5 C+1.53 C
196015.8 C+0.75 C
196115.8 C+0.75 C
196215.7 C+0.67 C
196314.8 C-0.17 C
196513.9 C-1.08 C
196614.9 C-0.08 C
196714.5 C-0.50 C
196914.2 C-0.82 C
197014.6 C-0.37 C
197113.4 C-1.61 C
197214.2 C-0.85 C
197414.2 C-0.77 C
197513.5 C-1.51 C
197614.2 C-0.80 C
199314.6 C-0.42 C
200114.5 C-0.51 C
200414.2 C-0.78 C
200514.2 C-0.83 C
200614.1 C-0.92 C
200914.1 C-0.91 C
201013.5 C-1.51 C
201113.1 C-1.87 C
201214.4 C-0.63 C
201314.2 C-0.79 C
201415.5 C+0.49 C
201515.0 C-0.02 C
201614.8 C-0.20 C
201715.3 C+0.31 C
201814.9 C-0.12 C
202015.4 C+0.35 C
202115.7 C+0.74 C
202514.5 C-0.52 C

The annual mean temperature here has fallen by 0.1 C (0.1 to 0.2) per decade over 1909 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 69 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Sonora
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.1 C (-0.2 to 0.0) per decade-0.2 F (-0.3 to -0.1) per decade1909 to 202569Fall
Mean daily maximum0.00 C (-0.07 to 0.06) per decade0.00 F (-0.12 to 0.12) per decade1909 to 202569Not clearly different from zero
Mean daily minimum-0.2 C (-0.3 to -0.1) per decade-0.4 F (-0.5 to -0.3) per decade1909 to 202569Fall

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 Sonora: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)45.0 C (113.0 F)196140.0 C (104.0 F)121
Coldest night (TNn)-13.3 C (8.1 F)1972-5.6 C (21.9 F)121
Wettest day (Rx1day)137.7 mm (5.4 in)190659.4 mm (2.3 in)123
Wettest five days (Rx5day)225.5 mm (8.9 in)1963124.0 mm (4.9 in)122
Longest dry spell (CDD)174 days202191 days122

Hottest day (TXx)

Hottest day (TXx) at Sonora by year The hottest day of the year at Sonora, 1903 to 2026. The record is 45.0 C (113.0 F) in 1961, marked on the chart; the median year is 40.0 C (104.0 F). 30354045192019401960198020002020Record: 45.0 C (113.0 F) in 1961
The hottest day of the year at Sonora, 1903 to 2026. The record is 45.0 C (113.0 F) in 1961, marked on the chart; the median year is 40.0 C (104.0 F).
Hottest day (TXx) at Sonora by year
YearHottest day (TXx)
1903n/a
1905n/a
190635.6 C (96.1 F)
190735.6 C (96.1 F)
190840.6 C (105.1 F)
190936.7 C (98.1 F)
191038.9 C (102.0 F)
191140.0 C (104.0 F)
191237.8 C (100.0 F)
191338.3 C (100.9 F)
191438.9 C (102.0 F)
191534.4 C (93.9 F)
191636.7 C (98.1 F)
191732.2 C (90.0 F)
191837.2 C (99.0 F)
191937.2 C (99.0 F)
192032.8 C (91.0 F)
192135.6 C (96.1 F)
192237.2 C (99.0 F)
192336.7 C (98.1 F)
192440.0 C (104.0 F)
192538.9 C (102.0 F)
192641.1 C (106.0 F)
192740.0 C (104.0 F)
192839.4 C (102.9 F)
192940.0 C (104.0 F)
193041.1 C (106.0 F)
193142.2 C (108.0 F)
193239.4 C (102.9 F)
193343.3 C (109.9 F)
193441.7 C (107.1 F)
193540.0 C (104.0 F)
193641.7 C (107.1 F)
193740.0 C (104.0 F)
193842.2 C (108.0 F)
193941.7 C (107.1 F)
194041.1 C (106.0 F)
194141.1 C (106.0 F)
194243.3 C (109.9 F)
194340.0 C (104.0 F)
194441.7 C (107.1 F)
194541.1 C (106.0 F)
194640.6 C (105.1 F)
194739.4 C (102.9 F)
194840.0 C (104.0 F)
194940.0 C (104.0 F)
195042.2 C (108.0 F)
195140.0 C (104.0 F)
195238.3 C (100.9 F)
195340.0 C (104.0 F)
195441.1 C (106.0 F)
195542.2 C (108.0 F)
195641.1 C (106.0 F)
195741.1 C (106.0 F)
195840.0 C (104.0 F)
195942.2 C (108.0 F)
196044.4 C (111.9 F)
196145.0 C (113.0 F)
196240.0 C (104.0 F)
196340.0 C (104.0 F)
196438.9 C (102.0 F)
196538.9 C (102.0 F)
196641.1 C (106.0 F)
196741.7 C (107.1 F)
196840.0 C (104.0 F)
196941.1 C (106.0 F)
197041.7 C (107.1 F)
197141.1 C (106.0 F)
197245.0 C (113.0 F)
197340.6 C (105.1 F)
197440.0 C (104.0 F)
197541.7 C (107.1 F)
197640.0 C (104.0 F)
197741.7 C (107.1 F)
197842.2 C (108.0 F)
197942.2 C (108.0 F)
198041.7 C (107.1 F)
198141.7 C (107.1 F)
198240.0 C (104.0 F)
198339.4 C (102.9 F)
198441.1 C (106.0 F)
198539.4 C (102.9 F)
198639.4 C (102.9 F)
198740.6 C (105.1 F)
198840.0 C (104.0 F)
198942.2 C (108.0 F)
199042.2 C (108.0 F)
199142.8 C (109.0 F)
199241.1 C (106.0 F)
199340.6 C (105.1 F)
199440.6 C (105.1 F)
199538.9 C (102.0 F)
199637.2 C (99.0 F)
199742.8 C (109.0 F)
199836.7 C (98.1 F)
199939.4 C (102.9 F)
200040.6 C (105.1 F)
200140.6 C (105.1 F)
200241.7 C (107.1 F)
200339.4 C (102.9 F)
200439.4 C (102.9 F)
200540.0 C (104.0 F)
200642.2 C (108.0 F)
200740.6 C (105.1 F)
200842.2 C (108.0 F)
200940.0 C (104.0 F)
201039.4 C (102.9 F)
201136.7 C (98.1 F)
201240.6 C (105.1 F)
201340.0 C (104.0 F)
201439.4 C (102.9 F)
201539.4 C (102.9 F)
201639.4 C (102.9 F)
201740.6 C (105.1 F)
201838.3 C (100.9 F)
201937.8 C (100.0 F)
202041.1 C (106.0 F)
202142.8 C (109.0 F)
202243.3 C (109.9 F)
202340.0 C (104.0 F)
202443.3 C (109.9 F)
202537.8 C (100.0 F)
202637.8 C (100.0 F)

Coldest night (TNn)

Coldest night (TNn) at Sonora by year The coldest night of the year at Sonora, 1903 to 2026. The record is -13.3 C (8.1 F) in 1972, marked on the chart; the median year is -5.6 C (21.9 F). -15-10-50192019401960198020002020Record: -13.3 C (8.1 F) in 1972
The coldest night of the year at Sonora, 1903 to 2026. The record is -13.3 C (8.1 F) in 1972, marked on the chart; the median year is -5.6 C (21.9 F).
Coldest night (TNn) at Sonora by year
YearColdest night (TNn)
1903n/a
1905n/a
1906-4.4 C (24.1 F)
1907-5.6 C (21.9 F)
1908-4.4 C (24.1 F)
1909-3.9 C (25.0 F)
1910-8.3 C (17.1 F)
1911-6.1 C (21.0 F)
1912-4.4 C (24.1 F)
1913-10.0 C (14.0 F)
1914-3.9 C (25.0 F)
1915-6.7 C (19.9 F)
1916-8.3 C (17.1 F)
1917-8.9 C (16.0 F)
1918-5.0 C (23.0 F)
1919-5.0 C (23.0 F)
1920-3.3 C (26.1 F)
1921-3.3 C (26.1 F)
1922-4.4 C (24.1 F)
1923-1.1 C (30.0 F)
1924-6.1 C (21.0 F)
1925-1.1 C (30.0 F)
1926-3.3 C (26.1 F)
1927-1.7 C (28.9 F)
1928-4.4 C (24.1 F)
1929-5.6 C (21.9 F)
1930-6.1 C (21.0 F)
1931-4.4 C (24.1 F)
1932-8.3 C (17.1 F)
1933-3.3 C (26.1 F)
1934-1.1 C (30.0 F)
1935-5.6 C (21.9 F)
1936-2.2 C (28.0 F)
1937-8.9 C (16.0 F)
1938-4.4 C (24.1 F)
1939-6.7 C (19.9 F)
1940-4.4 C (24.1 F)
1941-3.3 C (26.1 F)
1942-5.6 C (21.9 F)
1943-6.7 C (19.9 F)
1944-3.3 C (26.1 F)
1945-5.6 C (21.9 F)
1946-5.0 C (23.0 F)
1947-5.6 C (21.9 F)
1948-7.2 C (19.0 F)
1949-10.6 C (12.9 F)
1950-10.0 C (14.0 F)
1951-6.7 C (19.9 F)
1952-8.3 C (17.1 F)
1953-5.6 C (21.9 F)
1954-7.2 C (19.0 F)
1955-5.6 C (21.9 F)
1956-4.4 C (24.1 F)
1957-4.4 C (24.1 F)
1958-3.3 C (26.1 F)
1959-3.3 C (26.1 F)
1960-6.7 C (19.9 F)
1961-4.4 C (24.1 F)
1962-7.8 C (18.0 F)
1963-5.6 C (21.9 F)
1964-6.7 C (19.9 F)
1965-7.2 C (19.0 F)
1966-6.1 C (21.0 F)
1967-6.7 C (19.9 F)
1968-7.8 C (18.0 F)
1969-6.7 C (19.9 F)
1970-5.0 C (23.0 F)
1971-6.7 C (19.9 F)
1972-13.3 C (8.1 F)
1973-2.8 C (27.0 F)
1974-7.2 C (19.0 F)
1975-7.2 C (19.0 F)
1976-7.2 C (19.0 F)
1977-6.1 C (21.0 F)
1978-7.8 C (18.0 F)
1979-6.1 C (21.0 F)
1980-5.6 C (21.9 F)
1981-2.2 C (28.0 F)
1982-6.1 C (21.0 F)
1983-4.4 C (24.1 F)
1984-7.8 C (18.0 F)
1985-7.8 C (18.0 F)
1986-6.1 C (21.0 F)
1987-8.9 C (16.0 F)
1988-6.7 C (19.9 F)
1989-9.4 C (15.1 F)
1990-11.7 C (10.9 F)
1991-5.0 C (23.0 F)
1992-5.6 C (21.9 F)
1993-6.7 C (19.9 F)
1994-6.1 C (21.0 F)
1995-3.9 C (25.0 F)
1996-3.3 C (26.1 F)
1997-7.2 C (19.0 F)
1998-9.4 C (15.1 F)
1999-3.9 C (25.0 F)
2000-4.4 C (24.1 F)
2001-6.1 C (21.0 F)
2002-6.7 C (19.9 F)
2003-5.0 C (23.0 F)
2004-5.0 C (23.0 F)
2005-4.4 C (24.1 F)
2006-5.6 C (21.9 F)
2007-9.4 C (15.1 F)
2008-5.0 C (23.0 F)
2009-7.8 C (18.0 F)
2010-6.1 C (21.0 F)
2011-6.1 C (21.0 F)
2012-7.8 C (18.0 F)
2013-7.8 C (18.0 F)
2014-6.1 C (21.0 F)
2015-5.6 C (21.9 F)
2016-4.4 C (24.1 F)
2017-3.9 C (25.0 F)
2018-6.7 C (19.9 F)
2019-5.0 C (23.0 F)
2020-4.4 C (24.1 F)
2021-2.2 C (28.0 F)
2022-3.9 C (25.0 F)
2023-5.0 C (23.0 F)
2024-2.8 C (27.0 F)
2025-3.9 C (25.0 F)
2026-3.9 C (25.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Sonora by year The wettest day of the year at Sonora, 1903 to 2026. The record is 137.7 mm (5.4 in) in 1906, marked on the chart; the median year is 59.4 mm (2.3 in). 050100150192019401960198020002020Record: 137.7 mm (5.4 in) in 1906
The wettest day of the year at Sonora, 1903 to 2026. The record is 137.7 mm (5.4 in) in 1906, marked on the chart; the median year is 59.4 mm (2.3 in).
Wettest day (Rx1day) at Sonora by year
YearWettest day (Rx1day)
190316.8 mm (0.7 in)
19050.0 mm (0.00 in)
1906137.7 mm (5.4 in)
190770.9 mm (2.8 in)
190857.2 mm (2.3 in)
1909104.1 mm (4.1 in)
191037.6 mm (1.5 in)
191187.6 mm (3.4 in)
191242.2 mm (1.7 in)
191341.4 mm (1.6 in)
191462.0 mm (2.4 in)
191550.0 mm (2.0 in)
191663.5 mm (2.5 in)
191782.8 mm (3.3 in)
191879.5 mm (3.1 in)
1919124.5 mm (4.9 in)
192068.3 mm (2.7 in)
192150.8 mm (2.0 in)
1922101.6 mm (4.0 in)
192350.8 mm (2.0 in)
192459.2 mm (2.3 in)
192555.9 mm (2.2 in)
192655.4 mm (2.2 in)
192755.6 mm (2.2 in)
192865.5 mm (2.6 in)
192937.8 mm (1.5 in)
193040.6 mm (1.6 in)
193151.3 mm (2.0 in)
193259.4 mm (2.3 in)
193356.6 mm (2.2 in)
193447.2 mm (1.9 in)
193552.6 mm (2.1 in)
193654.1 mm (2.1 in)
193787.1 mm (3.4 in)
193884.8 mm (3.3 in)
193953.3 mm (2.1 in)
194079.2 mm (3.1 in)
194141.9 mm (1.6 in)
194262.7 mm (2.5 in)
194365.5 mm (2.6 in)
194459.9 mm (2.4 in)
194571.6 mm (2.8 in)
194675.4 mm (3.0 in)
194730.0 mm (1.2 in)
194842.9 mm (1.7 in)
194958.4 mm (2.3 in)
195064.3 mm (2.5 in)
195165.0 mm (2.6 in)
195256.9 mm (2.2 in)
195350.0 mm (2.0 in)
195446.2 mm (1.8 in)
1955116.1 mm (4.6 in)
195636.3 mm (1.4 in)
195786.6 mm (3.4 in)
195850.8 mm (2.0 in)
1959108.0 mm (4.3 in)
196049.5 mm (1.9 in)
196132.8 mm (1.3 in)
196259.9 mm (2.4 in)
1963116.8 mm (4.6 in)
196495.8 mm (3.8 in)
196549.0 mm (1.9 in)
196644.2 mm (1.7 in)
196757.2 mm (2.3 in)
196855.9 mm (2.2 in)
196969.9 mm (2.8 in)
197047.8 mm (1.9 in)
197143.2 mm (1.7 in)
197245.7 mm (1.8 in)
197363.0 mm (2.5 in)
197458.4 mm (2.3 in)
197548.3 mm (1.9 in)
197638.4 mm (1.5 in)
197752.1 mm (2.1 in)
197865.0 mm (2.6 in)
197955.4 mm (2.2 in)
198059.4 mm (2.3 in)
198172.9 mm (2.9 in)
1982127.8 mm (5.0 in)
198371.9 mm (2.8 in)
198439.1 mm (1.5 in)
198546.0 mm (1.8 in)
198647.0 mm (1.9 in)
198764.8 mm (2.6 in)
198842.7 mm (1.7 in)
198966.5 mm (2.6 in)
199046.7 mm (1.8 in)
199177.5 mm (3.1 in)
199264.8 mm (2.6 in)
199361.2 mm (2.4 in)
199453.3 mm (2.1 in)
1995102.9 mm (4.1 in)
199686.4 mm (3.4 in)
199753.3 mm (2.1 in)
199860.7 mm (2.4 in)
199935.6 mm (1.4 in)
200071.9 mm (2.8 in)
200161.0 mm (2.4 in)
2002113.3 mm (4.5 in)
200344.5 mm (1.8 in)
200451.1 mm (2.0 in)
200582.6 mm (3.3 in)
200685.9 mm (3.4 in)
200774.4 mm (2.9 in)
200851.8 mm (2.0 in)
200964.0 mm (2.5 in)
201072.1 mm (2.8 in)
201183.8 mm (3.3 in)
201279.2 mm (3.1 in)
201326.7 mm (1.1 in)
201456.1 mm (2.2 in)
201546.2 mm (1.8 in)
201657.2 mm (2.3 in)
201780.5 mm (3.2 in)
201859.4 mm (2.3 in)
201989.4 mm (3.5 in)
202061.0 mm (2.4 in)
202183.3 mm (3.3 in)
202260.5 mm (2.4 in)
202368.6 mm (2.7 in)
202447.2 mm (1.9 in)
202571.6 mm (2.8 in)
202651.8 mm (2.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Sonora by year The wettest five days of the year at Sonora, 1903 to 2026. The record is 225.5 mm (8.9 in) in 1963, marked on the chart; the median year is 124.0 mm (4.9 in). 0100200300192019401960198020002020Record: 225.5 mm (8.9 in) in 1963
The wettest five days of the year at Sonora, 1903 to 2026. The record is 225.5 mm (8.9 in) in 1963, marked on the chart; the median year is 124.0 mm (4.9 in).
Wettest five days (Rx5day) at Sonora by year
YearWettest five days (Rx5day)
1903n/a
19050.0 mm (0.00 in)
1906199.2 mm (7.8 in)
1907163.3 mm (6.4 in)
190857.2 mm (2.3 in)
1909181.4 mm (7.1 in)
191091.5 mm (3.6 in)
1911207.9 mm (8.2 in)
191263.5 mm (2.5 in)
1913117.6 mm (4.6 in)
1914191.0 mm (7.5 in)
1915120.4 mm (4.7 in)
1916112.3 mm (4.4 in)
1917209.8 mm (8.3 in)
1918121.1 mm (4.8 in)
1919216.5 mm (8.5 in)
192090.9 mm (3.6 in)
1921160.8 mm (6.3 in)
1922149.8 mm (5.9 in)
1923108.0 mm (4.3 in)
192464.7 mm (2.5 in)
1925124.0 mm (4.9 in)
1926139.4 mm (5.5 in)
1927130.6 mm (5.1 in)
1928193.2 mm (7.6 in)
192967.0 mm (2.6 in)
1930104.4 mm (4.1 in)
1931172.5 mm (6.8 in)
1932124.1 mm (4.9 in)
1933131.1 mm (5.2 in)
193488.4 mm (3.5 in)
193589.9 mm (3.5 in)
1936176.0 mm (6.9 in)
1937179.1 mm (7.1 in)
1938212.8 mm (8.4 in)
193984.6 mm (3.3 in)
1940159.1 mm (6.3 in)
1941128.4 mm (5.1 in)
1942143.2 mm (5.6 in)
1943155.4 mm (6.1 in)
194495.1 mm (3.7 in)
1945197.5 mm (7.8 in)
1946133.5 mm (5.3 in)
194755.1 mm (2.2 in)
194892.2 mm (3.6 in)
194983.3 mm (3.3 in)
1950114.3 mm (4.5 in)
195190.3 mm (3.6 in)
195276.7 mm (3.0 in)
195389.5 mm (3.5 in)
1954100.3 mm (3.9 in)
195576.2 mm (3.0 in)
195690.2 mm (3.6 in)
1957115.1 mm (4.5 in)
1958130.0 mm (5.1 in)
1959182.4 mm (7.2 in)
1960137.9 mm (5.4 in)
196178.1 mm (3.1 in)
1962144.3 mm (5.7 in)
1963225.5 mm (8.9 in)
1964203.3 mm (8.0 in)
1965144.0 mm (5.7 in)
1966161.6 mm (6.4 in)
1967118.1 mm (4.6 in)
196884.8 mm (3.3 in)
1969192.3 mm (7.6 in)
1970141.8 mm (5.6 in)
1971119.4 mm (4.7 in)
197273.2 mm (2.9 in)
1973126.0 mm (5.0 in)
1974103.6 mm (4.1 in)
1975106.2 mm (4.2 in)
197647.8 mm (1.9 in)
197761.3 mm (2.4 in)
1978137.7 mm (5.4 in)
1979157.8 mm (6.2 in)
1980185.5 mm (7.3 in)
1981199.4 mm (7.9 in)
1982155.1 mm (6.1 in)
1983176.6 mm (7.0 in)
198469.3 mm (2.7 in)
198562.5 mm (2.5 in)
198662.2 mm (2.4 in)
198793.7 mm (3.7 in)
198855.7 mm (2.2 in)
1989123.6 mm (4.9 in)
199066.0 mm (2.6 in)
1991132.1 mm (5.2 in)
1992135.8 mm (5.3 in)
1993125.4 mm (4.9 in)
199484.1 mm (3.3 in)
1995179.8 mm (7.1 in)
1996142.7 mm (5.6 in)
1997185.7 mm (7.3 in)
1998172.4 mm (6.8 in)
1999111.8 mm (4.4 in)
2000147.1 mm (5.8 in)
2001100.1 mm (3.9 in)
2002163.1 mm (6.4 in)
200380.2 mm (3.2 in)
2004110.0 mm (4.3 in)
2005140.5 mm (5.5 in)
2006202.0 mm (8.0 in)
2007126.1 mm (5.0 in)
200897.7 mm (3.8 in)
2009111.2 mm (4.4 in)
2010124.0 mm (4.9 in)
2011152.2 mm (6.0 in)
2012123.9 mm (4.9 in)
201333.6 mm (1.3 in)
2014101.6 mm (4.0 in)
201596.0 mm (3.8 in)
2016103.3 mm (4.1 in)
2017217.9 mm (8.6 in)
2018122.6 mm (4.8 in)
2019180.7 mm (7.1 in)
2020117.6 mm (4.6 in)
2021142.8 mm (5.6 in)
202287.1 mm (3.4 in)
2023155.7 mm (6.1 in)
202478.2 mm (3.1 in)
2025147.8 mm (5.8 in)
2026144.5 mm (5.7 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Sonora by year The longest dry spell of the year at Sonora, 1903 to 2026. The record is 174 days in 2021, marked on the chart; the median year is 91 days. 050100150200192019401960198020002020Record: 174 days in 2021
The longest dry spell of the year at Sonora, 1903 to 2026. The record is 174 days in 2021, marked on the chart; the median year is 91 days.
Longest dry spell (CDD) at Sonora by year
YearLongest dry spell (CDD)
1903n/a
190531 days
190611 days
190748 days
190862 days
1909104 days
1910133 days
1911109 days
191282 days
1913100 days
1914114 days
191527 days
191636 days
191727 days
191837 days
191923 days
192021 days
192126 days
192262 days
192391 days
192434 days
192534 days
1926146 days
1927117 days
1928121 days
192995 days
1930144 days
193171 days
1932151 days
193389 days
1934108 days
1935123 days
193655 days
193770 days
193862 days
1939111 days
1940152 days
1941111 days
1942137 days
194392 days
1944111 days
194591 days
194659 days
1947122 days
1948125 days
194999 days
195069 days
1951143 days
195246 days
1953108 days
1954148 days
1955158 days
195668 days
195798 days
195858 days
195986 days
1960129 days
196144 days
196291 days
196383 days
196456 days
196555 days
196653 days
1967103 days
196873 days
196982 days
1970115 days
197194 days
1972141 days
1973114 days
197483 days
1975106 days
197699 days
1977101 days
197870 days
1979149 days
198099 days
198181 days
198267 days
198362 days
198486 days
198540 days
1986136 days
198751 days
198870 days
198975 days
1990153 days
199173 days
199277 days
1993125 days
199485 days
199529 days
199638 days
1997101 days
199825 days
1999146 days
200081 days
2001156 days
2002106 days
200381 days
2004114 days
200595 days
2006131 days
2007140 days
200895 days
200999 days
201099 days
201158 days
201244 days
201362 days
201491 days
201571 days
2016160 days
2017100 days
2018128 days
2019112 days
2020147 days
2021174 days
202252 days
202342 days
202484 days
202565 days
202654 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

68 years with a frost

Across 68 years with a frost, the median last spring frost at Sonora falls on 11 April and the median first autumn frost on 16 November, which leaves a median of 217 days between them.

In 1962 to 2025 the median growing season was 214 days. That is 13 days fewer than in 1909 to 1949.

Fitted over all years, the growing season changes by -1.5 days per decade at this station.

Frost dates and growing season at Sonora
MeasureMedian, all yearsEarliest period (1909 to 1949)Recent period (1962 to 2025)Recent against earliestFitted trend
Last spring frost11 April2 April15 April13 days later+0.7 days per decade
First autumn frost16 November15 November13 November2 days earlier-0.8 days per decade
Growing days217 days227 days214 days13 days fewer-1.5 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

86 years, 1909 to 2025

A day with at least 59.0 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 127.7 mm (5.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Sonora: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years59.0 mm (2.3 in)
5 years77.1 mm (3.0 in)
10 years89.2 mm (3.5 in)
25 years104.6 mm (4.1 in)
50 years116.2 mm (4.6 in)
100 years127.7 mm (5.0 in)Longer than the 86 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 86 years of values from 1909 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: 116.8 mm (4.6 in) in 1963; 116.1 mm (4.6 in) in 1955; 113.3 mm (4.5 in) in 2002.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

  • Data for Sonora standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Sonora 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).