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Jefferson Weather Records (USC00414577)

Record envelope, standing records and threshold days for Jefferson (USC00414577), Texas, United States, with 124 years of record.

Key Facts for Jefferson

  • Jefferson (USC00414577) is a weather station in Texas, United States at 32.77 latitude and -94.36 longitude, 64 m (211 ft) above sea level.
  • The station reports from 1903 to 2026, 124 years of record.
  • 1,464 records set at Jefferson still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Jefferson set a daily record high maximum temperature of 33.9 C (93.0 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: Texas, United States, 32.77 latitude, -94.36 longitude.
  • Elevation: 64 m (211 ft).
  • Period of record: 1903 to 2026, 124 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

33 days at or beyond a record
Daily record high and record low at Jefferson, with 2026 drawn through them The band shows the record high and record low for each calendar day at Jefferson. The lines show the 2026 daily maximum and minimum. 33 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Jefferson. The lines show the 2026 daily maximum and minimum. 33 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Jefferson, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan27.8 C (82.0 F)-13.9 C (7.0 F)26.1 C (79.0 F)-10.0 C (14.0 F)
Feb33.3 C (91.9 F)-20.0 C (-4.0 F)30.0 C (86.0 F)-5.0 C (23.0 F)
Mar32.2 C (90.0 F)-9.4 C (15.1 F)32.2 C (90.0 F)-2.8 C (27.0 F)
Apr34.4 C (93.9 F)-2.2 C (28.0 F)30.0 C (86.0 F)1.7 C (35.1 F)
May36.1 C (97.0 F)3.3 C (37.9 F)32.2 C (90.0 F)8.9 C (48.0 F)
Jun41.7 C (107.1 F)7.8 C (46.0 F)34.4 C (93.9 F)20.6 C (69.1 F)
Jul41.7 C (107.1 F)12.8 C (55.0 F)37.8 C (100.0 F)20.0 C (68.0 F)
Aug44.4 C (111.9 F)11.1 C (52.0 F)41.1 C (106.0 F)17.8 C (64.0 F)
Sep42.8 C (109.0 F)3.3 C (37.9 F)38.9 C (102.0 F)14.4 C (57.9 F)
Oct36.1 C (97.0 F)-3.9 C (25.0 F)35.6 C (96.1 F)13.3 C (55.9 F)
Nov31.7 C (89.1 F)-8.9 C (16.0 F)n/an/a
Dec31.1 C (88.0 F)-20.6 C (-5.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Jefferson by the year they were set 1,464 records at Jefferson still stand. 2011 holds the most, with 145. 0501001501903: 51904: 281905: 331906: 371982: 151983: 31984: 501985: 501986: 361987: 301988: 261989: 661990: 471991: 291992: 241993: 281994: 231995: 331996: 511997: 341998: 441999: 262000: 532001: 192005: 42006: 32007: 132008: 272009: 342010: 602011: 1452012: 42013: 282014: 322015: 182016: 222017: 342018: 262019: 242020: 212021: 302022: 302023: 292024: 252025: 342026: 311903198319881993199820062011201620212026
1,464 records at Jefferson still stand. 2011 holds the most, with 145.
Standing records at Jefferson by the year they were set
Year setStanding records
19035
190428
190533
190637
198215
19833
198450
198550
198636
198730
198826
198966
199047
199129
199224
199328
199423
199533
199651
199734
199844
199926
200053
200119
20054
20063
200713
200827
200934
201060
2011145
20124
201328
201432
201518
201622
201734
201826
201924
202021
202130
202230
202329
202425
202534
202631

All-Time Record Progression

4 new records
When Jefferson set new all-time records 4 all-time records were set at Jefferson between 20 January 1948 and 16 February 2021. Each dot is a new record. Record snow depthRecord low maximum temperature20 January 1948: Record snow depth 10.2 cm (4.0 in)23 December 1963: Record snow depth 17.8 cm (7.0 in)15 February 2021: Record snow depth 22.9 cm (9.0 in)16 February 2021: Record low maximum temperature -8.9 C (16.0 F)19501960197019801990200020102020
4 all-time records were set at Jefferson between 20 January 1948 and 16 February 2021. Each dot is a new record.
When Jefferson set new all-time records
DateKindDetail
1948-01-20Record snow depthRecord snow depth 10.2 cm (4.0 in)
1963-12-23Record snow depthRecord snow depth 17.8 cm (7.0 in)
2021-02-15Record snow depthRecord snow depth 22.9 cm (9.0 in)
2021-02-16Record low maximum temperatureRecord low maximum temperature -8.9 C (16.0 F)

Wettest Day of Each Month

Apr: 231.1 mm (9.1 in)
Record daily precipitation for each month at Jefferson The wettest day on record for each calendar month at Jefferson. The most was 231.1 mm (9.1 in) on 26 April 1921. 0100200300 Jan: 104.6 mm (4.1 in), 5 January 1932 Jan Feb: 101.6 mm (4.0 in), 3 February 1989 Feb Mar: 171.5 mm (6.8 in), 9 March 2016 Mar Apr: 231.1 mm (9.1 in), 26 April 1921 Apr May: 164.3 mm (6.5 in), 14 May 2008 May Jun: 167.6 mm (6.6 in), 27 June 1986 Jun Jul: 157.5 mm (6.2 in), 12 July 1994 Jul Aug: 106.7 mm (4.2 in), 18 August 1915 Aug Sep: 199.1 mm (7.8 in), 17 September 1950 Sep Oct: 217.2 mm (8.6 in), 8 October 1994 Oct Nov: 124.0 mm (4.9 in), 10 November 1937 Nov Dec: 154.7 mm (6.1 in), 26 December 1904 Dec
The wettest day on record for each calendar month at Jefferson. The most was 231.1 mm (9.1 in) on 26 April 1921.
Record daily precipitation for each month at Jefferson
MonthRecord daily precipitation (mm)Date
Jan104.6 mm (4.1 in)5 January 1932
Feb101.6 mm (4.0 in)3 February 1989
Mar171.5 mm (6.8 in)9 March 2016
Apr231.1 mm (9.1 in)26 April 1921
May164.3 mm (6.5 in)14 May 2008
Jun167.6 mm (6.6 in)27 June 1986
Jul157.5 mm (6.2 in)12 July 1994
Aug106.7 mm (4.2 in)18 August 1915
Sep199.1 mm (7.8 in)17 September 1950
Oct217.2 mm (8.6 in)8 October 1994
Nov124.0 mm (4.9 in)10 November 1937
Dec154.7 mm (6.1 in)26 December 1904

Period of Record Coverage

1903 to 2026
Days with data per year at Jefferson 46 years of record at Jefferson, 1903 to 2026. 14 years have data for under 90 percent of days and are left out of rankings: 1903, 1982, 1983, 1986, 1991, 2001, 2005, 2006 and others. 1903: 61 of 365 days1904: 366 of 366 days1905: 365 of 365 days1906: 364 of 365 days1982: 162 of 365 days1983: 115 of 365 days1984: 331 of 366 days1985: 365 of 365 days1986: 288 of 365 days1987: 364 of 365 days1988: 365 of 366 days1989: 362 of 365 days1990: 359 of 365 days1991: 318 of 365 days1992: 366 of 366 days1993: 364 of 365 days1994: 365 of 365 days1995: 348 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 363 of 365 days2000: 363 of 366 days2001: 273 of 365 days2005: 30 of 365 days2006: 8 of 365 days2007: 171 of 365 days2008: 346 of 366 days2009: 357 of 365 days2010: 364 of 365 days2011: 353 of 365 days2012: 167 of 366 days2013: 179 of 365 days2014: 270 of 365 days2015: 219 of 365 days2016: 353 of 366 days2017: 353 of 365 days2018: 361 of 365 days2019: 333 of 365 days2020: 360 of 366 days2021: 358 of 365 days2022: 354 of 365 days2023: 352 of 365 days2024: 356 of 366 days2025: 338 of 365 days2026: 270 of 365 days1990200020102020
46 years of record at Jefferson, 1903 to 2026. 14 years have data for under 90 percent of days and are left out of rankings: 1903, 1982, 1983, 1986, 1991, 2001, 2005, 2006 and others.
Days with data per year at Jefferson
YearDays with dataShare of yearComplete
19036117%No
1904366100%Yes
1905365100%Yes
1906364100%Yes
198216244%No
198311532%No
198433190%Yes
1985365100%Yes
198628879%No
1987364100%Yes
1988365100%Yes
198936299%Yes
199035998%Yes
199131887%No
1992366100%Yes
1993364100%Yes
1994365100%Yes
199534895%Yes
1996366100%Yes
1997365100%Yes
1998365100%Yes
199936399%Yes
200036399%Yes
200127375%No
2005308%No
200682%No
200717147%No
200834695%Yes
200935798%Yes
2010364100%Yes
201135397%Yes
201216746%No
201317949%No
201427074%No
201521960%No
201635396%Yes
201735397%Yes
201836199%Yes
201933391%Yes
202036098%Yes
202135898%Yes
202235497%Yes
202335296%Yes
202435697%Yes
202533893%Yes
202627074%No

Latest Records

20
Latest records at Jefferson
DateStationRecordValueBeat old record byOld record stoodSignificance
9 October 2026Jefferson, USdaily high max (Provisional)33.9 C (93.0 F)0.6 C (1.1 F)16 years16 of 100 (Routine)
4 October 2026Jefferson, USdaily low max (Tie, Provisional)22.2 C (72.0 F)tie16 years3 of 100 (Routine)
3 October 2026Jefferson, USdaily rain (Tie, Provisional)45.2 mm (1.8 in)tie97 years9 of 100 (Routine)
2 October 2026Jefferson, USdaily high max (Provisional)35.6 C (96.1 F)1.2 C (2.2 F)7 years14 of 100 (Routine)
28 September 2026Jefferson, USdaily high max (Provisional)35.6 C (96.1 F)1.2 C (2.2 F)32 years22 of 100 (Routine)
23 September 2026Jefferson, USdaily high max (Provisional)37.2 C (99.0 F)1.1 C (2.0 F)3 years12 of 100 (Routine)
22 September 2026Jefferson, USdaily high max (Provisional)36.7 C (98.1 F)1.1 C (2.0 F)4 years13 of 100 (Routine)
21 September 2026Jefferson, USdaily high max (Provisional)37.2 C (99.0 F)1.6 C (2.9 F)16 years18 of 100 (Routine)
20 September 2026Jefferson, USdaily high max (Tie, Provisional)37.2 C (99.0 F)tie16 years3 of 100 (Routine)
19 September 2026Jefferson, USdaily high max (Tie, Provisional)37.2 C (99.0 F)tie16 years3 of 100 (Routine)
18 September 2026Jefferson, USdaily high max (Tie, Provisional)37.2 C (99.0 F)tie16 years3 of 100 (Routine)
17 September 2026Jefferson, USdaily high max (Provisional)37.8 C (100.0 F)1.7 C (3.1 F)7 years16 of 100 (Routine)
17 September 2026Jefferson, USdaily high min (Tie, Provisional)22.8 C (73.0 F)tie37 years5 of 100 (Routine)
16 September 2026Jefferson, USdaily high max (Provisional)37.8 C (100.0 F)1.1 C (2.0 F)7 years14 of 100 (Routine)
16 September 2026Jefferson, USdaily high min (Tie, Provisional)22.8 C (73.0 F)tie16 years3 of 100 (Routine)
15 September 2026Jefferson, USdaily high max (Provisional)38.9 C (102.0 F)1.1 C (2.0 F)15 years16 of 100 (Routine)
15 September 2026Jefferson, USdaily high min (Tie, Provisional)22.8 C (73.0 F)tie16 years3 of 100 (Routine)
10 September 2026Jefferson, USdaily high max (Provisional)37.2 C (99.0 F)1.1 C (2.0 F)11 years15 of 100 (Routine)
25 August 2026Jefferson, USdaily high min (Tie, Provisional)24.4 C (75.9 F)tie120 years10 of 100 (Routine)
5 August 2026Jefferson, USdaily low min17.8 C (64.0 F)1.1 C (2.0 F)36 years24 of 100 (Routine)

Climate Trend

29 complete years, 1904 to 2025
Annual mean temperature at Jefferson as warming stripes, 1904 to 2025 One stripe for each of 29 complete years at Jefferson, 1904 to 2025. Blue stripes are years cooler than the station's own mean of 18.0 C (64.3 F); red stripes are warmer. The coolest year was 1997, at 16.6 C (61.9 F), and the warmest was 2011, at 19.5 C (67.0 F). The strongest colour marks a difference of 1.5 C (2.7 F). 1904: 18.1 C, +0.2 C from the station mean1905: 17.5 C, -0.4 C from the station mean1906: 17.9 C, 0.0 C from the station mean1985: 17.6 C, -0.3 C from the station mean1987: 17.6 C, -0.3 C from the station mean1988: 17.2 C, -0.8 C from the station mean1989: 16.9 C, -1.1 C from the station mean1990: 17.8 C, -0.2 C from the station mean1992: 17.3 C, -0.7 C from the station mean1993: 16.9 C, -1.1 C from the station mean1994: 17.5 C, -0.5 C from the station mean1996: 17.0 C, -1.0 C from the station mean1997: 16.6 C, -1.3 C from the station mean1998: 18.8 C, +0.9 C from the station mean1999: 18.0 C, +0.1 C from the station mean2000: 17.6 C, -0.3 C from the station mean2008: 17.6 C, -0.4 C from the station mean2009: 18.2 C, +0.2 C from the station mean2010: 18.5 C, +0.5 C from the station mean2011: 19.5 C, +1.5 C from the station mean2016: 19.3 C, +1.3 C from the station mean2017: 19.0 C, +1.1 C from the station mean2018: 18.2 C, +0.3 C from the station mean2020: 18.0 C, 0.0 C from the station mean2021: 17.9 C, 0.0 C from the station mean2022: 18.1 C, +0.1 C from the station mean2023: 18.8 C, +0.9 C from the station mean2024: 18.8 C, +0.8 C from the station mean2025: 18.6 C, +0.6 C from the station mean1904191019201930194019501960197019801990200020102020
One stripe for each of 29 complete years at Jefferson, 1904 to 2025. Blue stripes are years cooler than the station's own mean of 18.0 C (64.3 F); red stripes are warmer. The coolest year was 1997, at 16.6 C (61.9 F), and the warmest was 2011, at 19.5 C (67.0 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Jefferson as warming stripes, 1904 to 2025
YearAnnual mean temperatureDifference from the station mean
190418.1 C+0.17 C
190517.5 C-0.42 C
190617.9 C-0.04 C
198517.6 C-0.32 C
198717.6 C-0.33 C
198817.2 C-0.75 C
198916.9 C-1.07 C
199017.8 C-0.15 C
199217.3 C-0.71 C
199316.9 C-1.08 C
199417.5 C-0.49 C
199617.0 C-1.01 C
199716.6 C-1.33 C
199818.8 C+0.88 C
199918.0 C+0.07 C
200017.6 C-0.34 C
200817.6 C-0.37 C
200918.2 C+0.25 C
201018.5 C+0.49 C
201119.5 C+1.50 C
201619.3 C+1.33 C
201719.0 C+1.07 C
201818.2 C+0.28 C
202018.0 C+0.04 C
202117.9 C-0.04 C
202218.1 C+0.12 C
202318.8 C+0.87 C
202418.8 C+0.83 C
202518.6 C+0.59 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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 Jefferson: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)44.4 C (111.9 F)201137.8 C (100.0 F)46
Coldest night (TNn)-20.6 C (-5.1 F)1989-9.1 C (15.5 F)46
Wettest day (Rx1day)231.1 mm (9.1 in)192184.9 mm (3.3 in)114
Wettest five days (Rx5day)328.4 mm (12.9 in)1966136.9 mm (5.4 in)114
Longest dry spell (CDD)58 days195225 days114

Hottest day (TXx)

Hottest day (TXx) at Jefferson by year The hottest day of the year at Jefferson, 1903 to 2026. The record is 44.4 C (111.9 F) in 2011, marked on the chart; the median year is 37.8 C (100.0 F). 2530354045192019401960198020002020Record: 44.4 C (111.9 F) in 2011
The hottest day of the year at Jefferson, 1903 to 2026. The record is 44.4 C (111.9 F) in 2011, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Jefferson by year
YearHottest day (TXx)
190328.3 C (82.9 F)
190435.0 C (95.0 F)
190534.4 C (93.9 F)
190634.4 C (93.9 F)
1913n/a
1914n/a
1915n/a
1916n/a
1917n/a
1918n/a
1919n/a
1920n/a
1921n/a
1922n/a
1923n/a
1924n/a
1925n/a
1926n/a
1927n/a
1928n/a
1929n/a
1930n/a
1931n/a
1932n/a
1933n/a
1934n/a
1935n/a
1936n/a
1937n/a
1938n/a
1939n/a
1940n/a
1941n/a
1942n/a
1943n/a
1944n/a
1945n/a
1946n/a
1947n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
1969n/a
1970n/a
1971n/a
1972n/a
1973n/a
1974n/a
1975n/a
1976n/a
1977n/a
1978n/a
1980n/a
1981n/a
198237.2 C (99.0 F)
198329.4 C (84.9 F)
198438.9 C (102.0 F)
198540.0 C (104.0 F)
198635.6 C (96.1 F)
198738.3 C (100.9 F)
198837.8 C (100.0 F)
198936.7 C (98.1 F)
199040.0 C (104.0 F)
199135.0 C (95.0 F)
199235.6 C (96.1 F)
199338.3 C (100.9 F)
199435.6 C (96.1 F)
199539.4 C (102.9 F)
199636.7 C (98.1 F)
199737.2 C (99.0 F)
199841.7 C (107.1 F)
199940.6 C (105.1 F)
200042.2 C (108.0 F)
200136.7 C (98.1 F)
200530.0 C (86.0 F)
200625.6 C (78.1 F)
200737.8 C (100.0 F)
200839.4 C (102.9 F)
200940.0 C (104.0 F)
201040.0 C (104.0 F)
201144.4 C (111.9 F)
201236.7 C (98.1 F)
201339.4 C (102.9 F)
201436.7 C (98.1 F)
201541.7 C (107.1 F)
201638.3 C (100.9 F)
201737.2 C (99.0 F)
201841.7 C (107.1 F)
201938.9 C (102.0 F)
202036.1 C (97.0 F)
202136.1 C (97.0 F)
202241.1 C (106.0 F)
202342.2 C (108.0 F)
202438.3 C (100.9 F)
202537.8 C (100.0 F)
202641.1 C (106.0 F)

Coldest night (TNn)

Coldest night (TNn) at Jefferson by year The coldest night of the year at Jefferson, 1903 to 2026. The record is -20.6 C (-5.1 F) in 1989, marked on the chart; the median year is -9.1 C (15.5 F). -25-20-15-10-50192019401960198020002020Record: -20.6 C (-5.1 F) in 1989
The coldest night of the year at Jefferson, 1903 to 2026. The record is -20.6 C (-5.1 F) in 1989, marked on the chart; the median year is -9.1 C (15.5 F).
Coldest night (TNn) at Jefferson by year
YearColdest night (TNn)
1903-8.9 C (16.0 F)
1904-10.6 C (12.9 F)
1905-15.0 C (5.0 F)
1906-7.8 C (18.0 F)
1913n/a
1914n/a
1915n/a
1916n/a
1917n/a
1918n/a
1919n/a
1920n/a
1921n/a
1922n/a
1923n/a
1924n/a
1925n/a
1926n/a
1927n/a
1928n/a
1929n/a
1930n/a
1931n/a
1932n/a
1933n/a
1934n/a
1935n/a
1936n/a
1937n/a
1938n/a
1939n/a
1940n/a
1941n/a
1942n/a
1943n/a
1944n/a
1945n/a
1946n/a
1947n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
1969n/a
1970n/a
1971n/a
1972n/a
1973n/a
1974n/a
1975n/a
1976n/a
1977n/a
1978n/a
1980n/a
1981n/a
1982-2.2 C (28.0 F)
1983-5.6 C (21.9 F)
1984-8.9 C (16.0 F)
1985-12.8 C (9.0 F)
1986-6.7 C (19.9 F)
1987-5.6 C (21.9 F)
1988-10.0 C (14.0 F)
1989-20.6 C (-5.1 F)
1990-11.1 C (12.0 F)
1991-9.4 C (15.1 F)
1992-9.4 C (15.1 F)
1993-6.7 C (19.9 F)
1994-8.3 C (17.1 F)
1995-8.9 C (16.0 F)
1996-12.8 C (9.0 F)
1997-10.0 C (14.0 F)
1998-6.7 C (19.9 F)
1999-10.0 C (14.0 F)
2000-7.8 C (18.0 F)
2001-10.6 C (12.9 F)
2005-9.4 C (15.1 F)
2006-3.9 C (25.0 F)
2007-5.6 C (21.9 F)
2008-7.8 C (18.0 F)
2009-6.7 C (19.9 F)
2010-11.1 C (12.0 F)
2011-10.0 C (14.0 F)
2012-6.7 C (19.9 F)
2013-5.0 C (23.0 F)
2014-11.1 C (12.0 F)
2015-8.3 C (17.1 F)
2016-7.8 C (18.0 F)
2017-10.6 C (12.9 F)
2018-13.9 C (7.0 F)
2019-7.2 C (19.0 F)
2020-5.6 C (21.9 F)
2021-20.0 C (-4.0 F)
2022-13.9 C (7.0 F)
2023-3.9 C (25.0 F)
2024-12.8 C (9.0 F)
2025-11.1 C (12.0 F)
2026-10.0 C (14.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Jefferson by year The wettest day of the year at Jefferson, 1903 to 2026. The record is 231.1 mm (9.1 in) in 1921, marked on the chart; the median year is 84.9 mm (3.3 in). 0100200300192019401960198020002020Record: 231.1 mm (9.1 in) in 1921
The wettest day of the year at Jefferson, 1903 to 2026. The record is 231.1 mm (9.1 in) in 1921, marked on the chart; the median year is 84.9 mm (3.3 in).
Wettest day (Rx1day) at Jefferson by year
YearWettest day (Rx1day)
190338.1 mm (1.5 in)
1904154.7 mm (6.1 in)
1905107.2 mm (4.2 in)
1906118.4 mm (4.7 in)
191394.0 mm (3.7 in)
191464.8 mm (2.6 in)
1915106.7 mm (4.2 in)
191666.0 mm (2.6 in)
191758.7 mm (2.3 in)
191889.2 mm (3.5 in)
191978.7 mm (3.1 in)
192077.5 mm (3.1 in)
1921231.1 mm (9.1 in)
1922100.3 mm (3.9 in)
192395.5 mm (3.8 in)
192471.1 mm (2.8 in)
1925114.0 mm (4.5 in)
1926128.0 mm (5.0 in)
192779.5 mm (3.1 in)
192877.2 mm (3.0 in)
192951.3 mm (2.0 in)
193081.3 mm (3.2 in)
1931118.1 mm (4.6 in)
1932104.6 mm (4.1 in)
1933101.1 mm (4.0 in)
193497.5 mm (3.8 in)
193578.7 mm (3.1 in)
193687.1 mm (3.4 in)
1937124.0 mm (4.9 in)
193855.9 mm (2.2 in)
193971.6 mm (2.8 in)
1940117.3 mm (4.6 in)
194167.8 mm (2.7 in)
1942103.4 mm (4.1 in)
194383.8 mm (3.3 in)
1944115.1 mm (4.5 in)
194595.3 mm (3.8 in)
194671.1 mm (2.8 in)
1947104.4 mm (4.1 in)
194859.7 mm (2.4 in)
194964.0 mm (2.5 in)
1950199.1 mm (7.8 in)
195186.4 mm (3.4 in)
195262.2 mm (2.4 in)
195356.9 mm (2.2 in)
195460.5 mm (2.4 in)
195578.7 mm (3.1 in)
195657.9 mm (2.3 in)
1957126.2 mm (5.0 in)
195872.4 mm (2.9 in)
195974.7 mm (2.9 in)
1960109.5 mm (4.3 in)
1961120.9 mm (4.8 in)
196250.8 mm (2.0 in)
196358.9 mm (2.3 in)
1964131.3 mm (5.2 in)
196554.6 mm (2.1 in)
1966144.0 mm (5.7 in)
196779.2 mm (3.1 in)
196871.1 mm (2.8 in)
1969102.6 mm (4.0 in)
197053.3 mm (2.1 in)
197153.6 mm (2.1 in)
197282.0 mm (3.2 in)
197372.4 mm (2.9 in)
197489.4 mm (3.5 in)
197567.6 mm (2.7 in)
197664.8 mm (2.6 in)
197770.6 mm (2.8 in)
197850.3 mm (2.0 in)
198039.9 mm (1.6 in)
198169.3 mm (2.7 in)
198252.1 mm (2.1 in)
198348.8 mm (1.9 in)
198474.9 mm (2.9 in)
1985101.6 mm (4.0 in)
1986167.6 mm (6.6 in)
198779.5 mm (3.1 in)
198853.3 mm (2.1 in)
1989152.4 mm (6.0 in)
1990110.5 mm (4.4 in)
199188.9 mm (3.5 in)
1992109.2 mm (4.3 in)
199388.9 mm (3.5 in)
1994217.2 mm (8.6 in)
1995104.1 mm (4.1 in)
1996136.7 mm (5.4 in)
199780.5 mm (3.2 in)
1998118.1 mm (4.6 in)
199979.0 mm (3.1 in)
200071.1 mm (2.8 in)
200188.1 mm (3.5 in)
20058.4 mm (0.33 in)
20060.0 mm (0.00 in)
200770.9 mm (2.8 in)
2008164.3 mm (6.5 in)
2009112.8 mm (4.4 in)
201034.3 mm (1.4 in)
201156.1 mm (2.2 in)
201271.1 mm (2.8 in)
2013121.9 mm (4.8 in)
201476.2 mm (3.0 in)
2015106.7 mm (4.2 in)
2016171.5 mm (6.8 in)
2017107.7 mm (4.2 in)
2018119.4 mm (4.7 in)
201999.6 mm (3.9 in)
2020116.8 mm (4.6 in)
202186.1 mm (3.4 in)
202294.0 mm (3.7 in)
202388.4 mm (3.5 in)
2024138.2 mm (5.4 in)
202599.6 mm (3.9 in)
202665.3 mm (2.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Jefferson by year The wettest five days of the year at Jefferson, 1903 to 2026. The record is 328.4 mm (12.9 in) in 1966, marked on the chart; the median year is 136.9 mm (5.4 in). 0100200300400192019401960198020002020Record: 328.4 mm (12.9 in) in 1966
The wettest five days of the year at Jefferson, 1903 to 2026. The record is 328.4 mm (12.9 in) in 1966, marked on the chart; the median year is 136.9 mm (5.4 in).
Wettest five days (Rx5day) at Jefferson by year
YearWettest five days (Rx5day)
190338.1 mm (1.5 in)
1904196.9 mm (7.8 in)
1905192.9 mm (7.6 in)
1906173.3 mm (6.8 in)
1913185.4 mm (7.3 in)
1914129.6 mm (5.1 in)
1915188.1 mm (7.4 in)
1916111.2 mm (4.4 in)
1917109.8 mm (4.3 in)
1918113.1 mm (4.5 in)
1919132.8 mm (5.2 in)
192096.3 mm (3.8 in)
1921274.3 mm (10.8 in)
1922161.2 mm (6.3 in)
1923183.9 mm (7.2 in)
192494.2 mm (3.7 in)
1925215.3 mm (8.5 in)
1926181.3 mm (7.1 in)
1927112.0 mm (4.4 in)
1928153.6 mm (6.0 in)
192976.4 mm (3.0 in)
1930197.6 mm (7.8 in)
1931141.5 mm (5.6 in)
1932114.5 mm (4.5 in)
1933178.2 mm (7.0 in)
1934122.2 mm (4.8 in)
1935133.3 mm (5.2 in)
1936129.0 mm (5.1 in)
1937162.4 mm (6.4 in)
193876.7 mm (3.0 in)
193999.1 mm (3.9 in)
1940200.4 mm (7.9 in)
194187.9 mm (3.5 in)
1942211.0 mm (8.3 in)
194383.8 mm (3.3 in)
1944201.4 mm (7.9 in)
1945141.0 mm (5.6 in)
1946176.5 mm (6.9 in)
1947136.7 mm (5.4 in)
194878.8 mm (3.1 in)
1949121.3 mm (4.8 in)
1950272.3 mm (10.7 in)
1951170.8 mm (6.7 in)
195289.9 mm (3.5 in)
1953145.3 mm (5.7 in)
1954140.2 mm (5.5 in)
1955140.7 mm (5.5 in)
195697.3 mm (3.8 in)
1957214.3 mm (8.4 in)
1958215.4 mm (8.5 in)
1959121.9 mm (4.8 in)
1960199.1 mm (7.8 in)
1961169.9 mm (6.7 in)
196274.0 mm (2.9 in)
196396.5 mm (3.8 in)
1964147.6 mm (5.8 in)
1965109.2 mm (4.3 in)
1966328.4 mm (12.9 in)
1967117.3 mm (4.6 in)
196895.3 mm (3.8 in)
1969118.3 mm (4.7 in)
1970107.2 mm (4.2 in)
1971102.8 mm (4.0 in)
1972112.7 mm (4.4 in)
1973137.2 mm (5.4 in)
1974180.1 mm (7.1 in)
1975155.2 mm (6.1 in)
197695.8 mm (3.8 in)
1977119.7 mm (4.7 in)
1978102.9 mm (4.1 in)
198051.1 mm (2.0 in)
1981108.0 mm (4.3 in)
198274.2 mm (2.9 in)
198359.9 mm (2.4 in)
1984126.5 mm (5.0 in)
1985113.8 mm (4.5 in)
1986238.2 mm (9.4 in)
1987211.3 mm (8.3 in)
198898.0 mm (3.9 in)
1989216.7 mm (8.5 in)
1990187.7 mm (7.4 in)
1991170.2 mm (6.7 in)
1992118.0 mm (4.6 in)
1993176.1 mm (6.9 in)
1994220.7 mm (8.7 in)
1995110.2 mm (4.3 in)
1996137.4 mm (5.4 in)
1997151.1 mm (5.9 in)
1998240.8 mm (9.5 in)
1999107.2 mm (4.2 in)
2000117.7 mm (4.6 in)
2001137.0 mm (5.4 in)
20058.4 mm (0.33 in)
20060.0 mm (0.00 in)
2007166.7 mm (6.6 in)
2008171.4 mm (6.7 in)
2009184.7 mm (7.3 in)
201055.4 mm (2.2 in)
201187.1 mm (3.4 in)
201292.1 mm (3.6 in)
2013143.5 mm (5.6 in)
2014176.6 mm (7.0 in)
2015141.0 mm (5.6 in)
2016262.7 mm (10.3 in)
2017148.4 mm (5.8 in)
2018147.4 mm (5.8 in)
2019115.4 mm (4.5 in)
2020142.2 mm (5.6 in)
2021109.7 mm (4.3 in)
2022164.8 mm (6.5 in)
2023125.8 mm (5.0 in)
2024169.4 mm (6.7 in)
2025113.8 mm (4.5 in)
202681.3 mm (3.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Jefferson by year The longest dry spell of the year at Jefferson, 1903 to 2026. The record is 58 days in 1952, marked on the chart; the median year is 25 days. 0204060192019401960198020002020Record: 58 days in 1952
The longest dry spell of the year at Jefferson, 1903 to 2026. The record is 58 days in 1952, marked on the chart; the median year is 25 days.
Longest dry spell (CDD) at Jefferson by year
YearLongest dry spell (CDD)
190327 days
190446 days
190515 days
190619 days
191331 days
191431 days
191520 days
191622 days
191722 days
191832 days
191922 days
192021 days
192148 days
192237 days
192325 days
192447 days
192532 days
192626 days
192722 days
192832 days
192929 days
193038 days
193132 days
193226 days
193330 days
193433 days
193519 days
193631 days
193721 days
193827 days
193925 days
194021 days
194118 days
194231 days
194325 days
194429 days
194520 days
194625 days
194734 days
194834 days
194922 days
195028 days
195138 days
195258 days
195351 days
195447 days
195529 days
195632 days
195721 days
195823 days
195920 days
196022 days
196122 days
196227 days
196321 days
196430 days
196528 days
196620 days
196721 days
196825 days
196939 days
197031 days
197121 days
197218 days
197317 days
197418 days
197524 days
197617 days
197715 days
197826 days
198023 days
198120 days
198225 days
198317 days
198420 days
198520 days
198629 days
198720 days
198822 days
198926 days
199031 days
199129 days
199220 days
199337 days
199417 days
199528 days
199624 days
199729 days
199828 days
199946 days
200032 days
200130 days
20057 days
200612 days
200725 days
200821 days
200918 days
201031 days
201126 days
201215 days
201322 days
201422 days
201548 days
201634 days
201723 days
201830 days
201912 days
202025 days
202116 days
202241 days
202330 days
202431 days
202523 days
202625 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

29 years with a frost

Across 29 years with a frost, the median last spring frost at Jefferson falls on 21 March and the median first autumn frost on 5 November, which leaves a median of 230 days between them.

Fitted over all years, the growing season changes by -0.3 days per decade at this station.

Frost dates and growing season at Jefferson
MeasureMedian, all yearsEarliest periodRecent period (1904 to 2025)Recent against earliestFitted trend
Last spring frost21 Marchn/a21 Marchn/a+0.4 days per decade
First autumn frost5 Novembern/a5 Novembern/a0.0 days per decade
Growing days230 daysn/a230 daysn/a-0.3 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

100 years, 1904 to 2025

A day with at least 87.5 mm (3.4 in) of rain is expected about once in 2 years. A day with at least 212.1 mm (8.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Jefferson: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years87.5 mm (3.4 in)
5 years117.8 mm (4.6 in)
10 years139.1 mm (5.5 in)
25 years167.3 mm (6.6 in)
50 years189.3 mm (7.5 in)
100 years212.1 mm (8.4 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 100 years of values from 1904 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: 231.1 mm (9.1 in) in 1921; 217.2 mm (8.6 in) in 1994; 199.1 mm (7.8 in) in 1950.

Download the Data

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