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Mt Vernon Weather Records (USC00416119)

Record envelope, standing records and threshold days for Mt Vernon (USC00416119), Texas, United States, with 61 years of record.

Key Facts for Mt Vernon

  • Mt Vernon (USC00416119) is a weather station in Texas, United States at 33.20 latitude and -95.22 longitude, 136 m (447 ft) above sea level.
  • The station reports from 1966 to 2026, 61 years of record.
  • 1,464 records set at Mt Vernon still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Mt Vernon set a daily record high minimum temperature of 24.4 C (75.9 F) on 16 September 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, 33.20 latitude, -95.22 longitude.
  • Elevation: 136 m (447 ft).
  • Period of record: 1966 to 2026, 61 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

10 days at or beyond a record
Daily record high and record low at Mt Vernon, with 2026 drawn through them The band shows the record high and record low for each calendar day at Mt Vernon. The lines show the 2026 daily maximum and minimum. 10 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 Mt Vernon. The lines show the 2026 daily maximum and minimum. 10 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Mt Vernon, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan27.8 C (82.0 F)-16.7 C (1.9 F)25.0 C (77.0 F)-10.6 C (12.9 F)
Feb32.2 C (90.0 F)-17.2 C (1.0 F)27.8 C (82.0 F)-7.2 C (19.0 F)
Mar32.2 C (90.0 F)-11.7 C (10.9 F)31.7 C (89.1 F)-2.8 C (27.0 F)
Apr36.1 C (97.0 F)-3.9 C (25.0 F)31.1 C (88.0 F)3.9 C (39.0 F)
May36.1 C (97.0 F)3.9 C (39.0 F)31.7 C (89.1 F)8.9 C (48.0 F)
Jun40.6 C (105.1 F)10.0 C (50.0 F)35.0 C (95.0 F)20.0 C (68.0 F)
Jul42.8 C (109.0 F)12.8 C (55.0 F)38.3 C (100.9 F)20.0 C (68.0 F)
Aug44.4 C (111.9 F)9.4 C (48.9 F)40.6 C (105.1 F)19.4 C (66.9 F)
Sep42.2 C (108.0 F)3.3 C (37.9 F)38.3 C (100.9 F)15.0 C (59.0 F)
Oct35.6 C (96.1 F)-5.0 C (23.0 F)n/an/a
Nov31.7 C (89.1 F)-10.6 C (12.9 F)n/an/a
Dec28.9 C (84.0 F)-20.6 C (-5.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Mt Vernon by the year they were set 1,464 records at Mt Vernon still stand. 2011 holds the most, with 84. 02550751001966: 191967: 361968: 211969: 141970: 201971: 201972: 301973: 91974: 391975: 211976: 451977: 221978: 331979: 241980: 221981: 221982: 281983: 381984: 211985: 301986: 221987: 131988: 101989: 401990: 191991: 191992: 151993: 161994: 131995: 181996: 361997: 261998: 411999: 142000: 282001: 212002: 152003: 122004: 162005: 452006: 572007: 482008: 112009: 142010: 132011: 842012: 222013: 262014: 212015: 122016: 152017: 202018: 222019: 122020: 92021: 272022: 292023: 92024: 162025: 262026: 18196619731980198719942001200820152022
1,464 records at Mt Vernon still stand. 2011 holds the most, with 84.
Standing records at Mt Vernon by the year they were set
Year setStanding records
196619
196736
196821
196914
197020
197120
197230
19739
197439
197521
197645
197722
197833
197924
198022
198122
198228
198338
198421
198530
198622
198713
198810
198940
199019
199119
199215
199316
199413
199518
199636
199726
199841
199914
200028
200121
200215
200312
200416
200545
200657
200748
200811
200914
201013
201184
201222
201326
201421
201512
201615
201720
201822
201912
20209
202127
202229
20239
202416
202526
202618

All-Time Record Progression

6 new records
When Mt Vernon set new all-time records 6 all-time records were set at Mt Vernon between 8 July 1996 and 28 December 2015. Each dot is a new record. Record high minimum temperatureRecord high maximum temperatureRecord daily precipitation8 July 1996: Record high minimum temperature 26.7 C (80.1 F)12 July 1998: Record high minimum temperature 27.8 C (82.0 F)2 August 1998: Record high maximum temperature 42.2 C (108.0 F)8 June 2007: Record high minimum temperature 30.0 C (86.0 F)3 August 2011: Record high maximum temperature 44.4 C (111.9 F)28 December 2015: Record daily precipitation 213.9 mm (8.4 in)2000200520102015
6 all-time records were set at Mt Vernon between 8 July 1996 and 28 December 2015. Each dot is a new record.
When Mt Vernon set new all-time records
DateKindDetail
1996-07-08Record high minimum temperatureRecord high minimum temperature 26.7 C (80.1 F)
1998-07-12Record high minimum temperatureRecord high minimum temperature 27.8 C (82.0 F)
1998-08-02Record high maximum temperatureRecord high maximum temperature 42.2 C (108.0 F)
2007-06-08Record high minimum temperatureRecord high minimum temperature 30.0 C (86.0 F)
2011-08-03Record high maximum temperatureRecord high maximum temperature 44.4 C (111.9 F)
2015-12-28Record daily precipitationRecord daily precipitation 213.9 mm (8.4 in)

Wettest Day of Each Month

Dec: 213.9 mm (8.4 in)
Record daily precipitation for each month at Mt Vernon The wettest day on record for each calendar month at Mt Vernon. The most was 213.9 mm (8.4 in) on 28 December 2015. 0100200300 Jan: 104.9 mm (4.1 in), 3 January 2015 Jan Feb: 107.2 mm (4.2 in), 16 February 2001 Feb Mar: 110.7 mm (4.4 in), 8 March 1990 Mar Apr: 99.3 mm (3.9 in), 21 April 2024 Apr May: 100.1 mm (3.9 in), 3 May 2009 May Jun: 124.2 mm (4.9 in), 29 June 1992 Jun Jul: 154.9 mm (6.1 in), 23 July 1990 Jul Aug: 144.8 mm (5.7 in), 13 August 2017 Aug Sep: 122.4 mm (4.8 in), 6 September 1973 Sep Oct: 148.1 mm (5.8 in), 19 October 2002 Oct Nov: 146.3 mm (5.8 in), 1 November 1977 Nov Dec: 213.9 mm (8.4 in), 28 December 2015 Dec
The wettest day on record for each calendar month at Mt Vernon. The most was 213.9 mm (8.4 in) on 28 December 2015.
Record daily precipitation for each month at Mt Vernon
MonthRecord daily precipitation (mm)Date
Jan104.9 mm (4.1 in)3 January 2015
Feb107.2 mm (4.2 in)16 February 2001
Mar110.7 mm (4.4 in)8 March 1990
Apr99.3 mm (3.9 in)21 April 2024
May100.1 mm (3.9 in)3 May 2009
Jun124.2 mm (4.9 in)29 June 1992
Jul154.9 mm (6.1 in)23 July 1990
Aug144.8 mm (5.7 in)13 August 2017
Sep122.4 mm (4.8 in)6 September 1973
Oct148.1 mm (5.8 in)19 October 2002
Nov146.3 mm (5.8 in)1 November 1977
Dec213.9 mm (8.4 in)28 December 2015

Period of Record Coverage

1966 to 2026
Days with data per year at Mt Vernon 61 years of record at Mt Vernon, 1966 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1966, 2023, 2026. 1966: 227 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 358 of 365 days1970: 359 of 365 days1971: 363 of 365 days1972: 364 of 366 days1973: 364 of 365 days1974: 364 of 365 days1975: 348 of 365 days1976: 350 of 366 days1977: 363 of 365 days1978: 364 of 365 days1979: 364 of 365 days1980: 334 of 366 days1981: 365 of 365 days1982: 364 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 364 of 365 days1986: 364 of 365 days1987: 361 of 365 days1988: 333 of 366 days1989: 363 of 365 days1990: 363 of 365 days1991: 364 of 365 days1992: 366 of 366 days1993: 333 of 365 days1994: 364 of 365 days1995: 364 of 365 days1996: 366 of 366 days1997: 363 of 365 days1998: 359 of 365 days1999: 365 of 365 days2000: 363 of 366 days2001: 361 of 365 days2002: 349 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 358 of 365 days2008: 365 of 366 days2009: 365 of 365 days2010: 364 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 364 of 365 days2016: 366 of 366 days2017: 365 of 365 days2018: 364 of 365 days2019: 365 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 363 of 365 days2023: 213 of 365 days2024: 365 of 366 days2025: 365 of 365 days2026: 254 of 365 days197019801990200020102020
61 years of record at Mt Vernon, 1966 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1966, 2023, 2026.
Days with data per year at Mt Vernon
YearDays with dataShare of yearComplete
196622762%No
1967365100%Yes
1968366100%Yes
196935898%Yes
197035998%Yes
197136399%Yes
197236499%Yes
1973364100%Yes
1974364100%Yes
197534895%Yes
197635096%Yes
197736399%Yes
1978364100%Yes
1979364100%Yes
198033491%Yes
1981365100%Yes
1982364100%Yes
1983365100%Yes
1984366100%Yes
1985364100%Yes
1986364100%Yes
198736199%Yes
198833391%Yes
198936399%Yes
199036399%Yes
1991364100%Yes
1992366100%Yes
199333391%Yes
1994364100%Yes
1995364100%Yes
1996366100%Yes
199736399%Yes
199835998%Yes
1999365100%Yes
200036399%Yes
200136199%Yes
200234996%Yes
2003365100%Yes
2004366100%Yes
2005365100%Yes
2006365100%Yes
200735898%Yes
2008365100%Yes
2009365100%Yes
2010364100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015364100%Yes
2016366100%Yes
2017365100%Yes
2018364100%Yes
2019365100%Yes
2020366100%Yes
2021365100%Yes
202236399%Yes
202321358%No
2024365100%Yes
2025365100%Yes
202625470%No

Latest Records

20
Latest records at Mt Vernon
DateStationRecordValueBeat old record byOld record stoodSignificance
16 September 2026Mt Vernon, USdaily high min (Provisional)24.4 C (75.9 F)1.1 C (2.0 F)48 years22 of 100 (Routine)
15 September 2026Mt Vernon, USdaily high min (Provisional)25.6 C (78.1 F)0.6 C (1.1 F)20 years13 of 100 (Routine)
10 September 2026Mt Vernon, USdaily high min (Provisional)24.4 C (75.9 F)0.5 C (0.9 F)16 years11 of 100 (Routine)
9 September 2026Mt Vernon, USdaily high min (Tie, Provisional)24.4 C (75.9 F)tie9 years2 of 100 (Routine)
8 September 2026Mt Vernon, USdaily high min (Provisional)24.4 C (75.9 F)0.5 C (0.9 F)36 years18 of 100 (Routine)
26 August 2026Mt Vernon, USdaily high min (Provisional)26.1 C (79.0 F)0.5 C (0.9 F)28 years15 of 100 (Routine)
25 August 2026Mt Vernon, USdaily high min (Tie, Provisional)25.0 C (77.0 F)tie28 years3 of 100 (Routine)
21 August 2026Mt Vernon, USdaily high min (Tie, Provisional)26.7 C (80.1 F)tie15 years2 of 100 (Routine)
16 August 2026Mt Vernon, USdaily high min (Provisional)26.1 C (79.0 F)0.5 C (0.9 F)28 years15 of 100 (Routine)
15 August 2026Mt Vernon, USdaily high min (Tie, Provisional)26.1 C (79.0 F)tie16 years2 of 100 (Routine)
1 August 2026Mt Vernon, USdaily high min (Tie)26.1 C (79.0 F)tie4 years1 of 100 (Routine)
31 July 2026Mt Vernon, USdaily high min (Tie)25.6 C (78.1 F)tie28 years3 of 100 (Routine)
29 June 2026Mt Vernon, USdaily high min25.6 C (78.1 F)0.6 C (1.1 F)27 years16 of 100 (Routine)
19 May 2026Mt Vernon, USdaily high min24.4 C (75.9 F)1.6 C (2.9 F)8 years11 of 100 (Routine)
18 May 2026Mt Vernon, USdaily high min23.3 C (73.9 F)0.5 C (0.9 F)60 years25 of 100 (Routine)
27 April 2026Mt Vernon, USmonthly high min23.3 C (73.9 F)0.5 C (0.9 F)55 years33 of 100 (Routine)
27 April 2026Mt Vernon, USdaily high max31.1 C (88.0 F)0.5 C (0.9 F)39 years18 of 100 (Routine)
22 April 2026Mt Vernon, USdaily low max15.0 C (59.0 F)1.1 C (2.0 F)44 years21 of 100 (Routine)
15 April 2026Mt Vernon, USdaily high min (Tie)20.0 C (68.0 F)tie24 years3 of 100 (Routine)
23 March 2026Mt Vernon, USdaily high max31.7 C (89.1 F)2.3 C (4.1 F)31 years18 of 100 (Routine)

Climate Trend

55 complete years, 1967 to 2025
Annual mean temperature at Mt Vernon as warming stripes, 1967 to 2025 One stripe for each of 55 complete years at Mt Vernon, 1967 to 2025. Blue stripes are years cooler than the station's own mean of 17.8 C (64.0 F); red stripes are warmer. The coolest year was 1979, at 16.2 C (61.2 F), and the warmest was 2006, at 20.5 C (68.9 F). The strongest colour marks a difference of 2.8 C (5.0 F). 1967: 17.2 C, -0.6 C from the station mean1968: 16.4 C, -1.4 C from the station mean1969: 17.3 C, -0.5 C from the station mean1970: 17.2 C, -0.6 C from the station mean1971: 17.7 C, -0.1 C from the station mean1972: 17.3 C, -0.5 C from the station mean1973: 17.2 C, -0.6 C from the station mean1974: 17.2 C, -0.6 C from the station mean1975: 17.1 C, -0.7 C from the station mean1976: 16.3 C, -1.5 C from the station mean1977: 17.8 C, 0.0 C from the station mean1978: 17.0 C, -0.8 C from the station mean1979: 16.2 C, -1.5 C from the station mean1981: 17.4 C, -0.3 C from the station mean1982: 17.3 C, -0.5 C from the station mean1983: 16.3 C, -1.5 C from the station mean1984: 17.3 C, -0.4 C from the station mean1985: 17.2 C, -0.6 C from the station mean1986: 18.2 C, +0.4 C from the station mean1987: 17.8 C, 0.0 C from the station mean1989: 16.9 C, -0.9 C from the station mean1990: 18.3 C, +0.5 C from the station mean1991: 17.7 C, -0.1 C from the station mean1992: 17.0 C, -0.7 C from the station mean1994: 17.4 C, -0.4 C from the station mean1995: 17.5 C, -0.3 C from the station mean1996: 17.3 C, -0.5 C from the station mean1997: 17.0 C, -0.8 C from the station mean1998: 18.9 C, +1.1 C from the station mean1999: 18.8 C, +1.1 C from the station mean2000: 18.0 C, +0.2 C from the station mean2001: 17.8 C, 0.0 C from the station mean2002: 17.7 C, -0.1 C from the station mean2003: 18.0 C, +0.2 C from the station mean2004: 18.1 C, +0.3 C from the station mean2005: 19.3 C, +1.6 C from the station mean2006: 20.5 C, +2.7 C from the station mean2007: 19.0 C, +1.2 C from the station mean2008: 16.9 C, -0.9 C from the station mean2009: 17.1 C, -0.7 C from the station mean2010: 17.8 C, 0.0 C from the station mean2011: 19.0 C, +1.2 C from the station mean2012: 19.3 C, +1.5 C from the station mean2013: 17.5 C, -0.3 C from the station mean2014: 16.9 C, -0.9 C from the station mean2015: 18.3 C, +0.5 C from the station mean2016: 19.3 C, +1.5 C from the station mean2017: 19.0 C, +1.2 C from the station mean2018: 18.3 C, +0.5 C from the station mean2019: 18.0 C, +0.2 C from the station mean2020: 18.2 C, +0.4 C from the station mean2021: 18.1 C, +0.3 C from the station mean2022: 18.4 C, +0.6 C from the station mean2024: 19.0 C, +1.2 C from the station mean2025: 18.5 C, +0.7 C from the station mean196719751980198519901995200020052010201520202025
One stripe for each of 55 complete years at Mt Vernon, 1967 to 2025. Blue stripes are years cooler than the station's own mean of 17.8 C (64.0 F); red stripes are warmer. The coolest year was 1979, at 16.2 C (61.2 F), and the warmest was 2006, at 20.5 C (68.9 F). The strongest colour marks a difference of 2.8 C (5.0 F).
Annual mean temperature at Mt Vernon as warming stripes, 1967 to 2025
YearAnnual mean temperatureDifference from the station mean
196717.2 C-0.62 C
196816.4 C-1.40 C
196917.3 C-0.52 C
197017.2 C-0.63 C
197117.7 C-0.12 C
197217.3 C-0.53 C
197317.2 C-0.58 C
197417.2 C-0.59 C
197517.1 C-0.72 C
197616.3 C-1.52 C
197717.8 C+0.04 C
197817.0 C-0.76 C
197916.2 C-1.54 C
198117.4 C-0.34 C
198217.3 C-0.50 C
198316.3 C-1.50 C
198417.3 C-0.44 C
198517.2 C-0.55 C
198618.2 C+0.38 C
198717.8 C+0.04 C
198916.9 C-0.90 C
199018.3 C+0.48 C
199117.7 C-0.12 C
199217.0 C-0.74 C
199417.4 C-0.39 C
199517.5 C-0.27 C
199617.3 C-0.45 C
199717.0 C-0.79 C
199818.9 C+1.14 C
199918.8 C+1.06 C
200018.0 C+0.25 C
200117.8 C-0.03 C
200217.7 C-0.09 C
200318.0 C+0.21 C
200418.1 C+0.31 C
200519.3 C+1.56 C
200620.5 C+2.74 C
200719.0 C+1.22 C
200816.9 C-0.87 C
200917.1 C-0.69 C
201017.8 C-0.01 C
201119.0 C+1.25 C
201219.3 C+1.47 C
201317.5 C-0.25 C
201416.9 C-0.85 C
201518.3 C+0.51 C
201619.3 C+1.53 C
201719.0 C+1.22 C
201818.3 C+0.51 C
201918.0 C+0.21 C
202018.2 C+0.38 C
202118.1 C+0.33 C
202218.4 C+0.65 C
202419.0 C+1.25 C
202518.5 C+0.74 C

The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1967 to 2025. In Fahrenheit: 0.6 F (0.4 to 0.8) per decade. The slope is a straight line fitted to 55 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Mt Vernon
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.3 C (0.2 to 0.4) per decade0.6 F (0.4 to 0.8) per decade1967 to 202555Rise
Mean daily maximum0.3 C (0.1 to 0.4) per decade0.5 F (0.2 to 0.7) per decade1967 to 202555Rise
Mean daily minimum0.4 C (0.3 to 0.5) per decade0.6 F (0.5 to 0.8) per decade1967 to 202555Rise

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

1966 to 2026
Yearly extremes at Mt Vernon: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)44.4 C (111.9 F)201139.4 C (102.9 F)61
Coldest night (TNn)-20.6 C (-5.1 F)1989-9.4 C (15.1 F)61
Wettest day (Rx1day)213.9 mm (8.4 in)201591.4 mm (3.6 in)61
Wettest five days (Rx5day)242.3 mm (9.5 in)1998142.2 mm (5.6 in)61
Longest dry spell (CDD)47 days199926 days61

Hottest day (TXx)

Hottest day (TXx) at Mt Vernon by year The hottest day of the year at Mt Vernon, 1966 to 2026. The record is 44.4 C (111.9 F) in 2011, marked on the chart; the median year is 39.4 C (102.9 F). 30354045197019801990200020102020Record: 44.4 C (111.9 F) in 2011
The hottest day of the year at Mt Vernon, 1966 to 2026. The record is 44.4 C (111.9 F) in 2011, marked on the chart; the median year is 39.4 C (102.9 F).
Hottest day (TXx) at Mt Vernon by year
YearHottest day (TXx)
196638.3 C (100.9 F)
196738.3 C (100.9 F)
196836.7 C (98.1 F)
196940.6 C (105.1 F)
197039.4 C (102.9 F)
197140.6 C (105.1 F)
197238.9 C (102.0 F)
197339.4 C (102.9 F)
197440.0 C (104.0 F)
197536.7 C (98.1 F)
197636.7 C (98.1 F)
197740.0 C (104.0 F)
197840.0 C (104.0 F)
197937.2 C (99.0 F)
198040.0 C (104.0 F)
198138.3 C (100.9 F)
198238.3 C (100.9 F)
198337.8 C (100.0 F)
198441.1 C (106.0 F)
198540.6 C (105.1 F)
198641.1 C (106.0 F)
198738.9 C (102.0 F)
198838.9 C (102.0 F)
198935.6 C (96.1 F)
199038.9 C (102.0 F)
199136.1 C (97.0 F)
199233.9 C (93.0 F)
199338.9 C (102.0 F)
199435.6 C (96.1 F)
199539.4 C (102.9 F)
199639.4 C (102.9 F)
199737.8 C (100.0 F)
199842.2 C (108.0 F)
199941.1 C (106.0 F)
200042.2 C (108.0 F)
200138.3 C (100.9 F)
200237.2 C (99.0 F)
200341.7 C (107.1 F)
200437.2 C (99.0 F)
200541.1 C (106.0 F)
200642.2 C (108.0 F)
200740.6 C (105.1 F)
200840.6 C (105.1 F)
200939.4 C (102.9 F)
201041.1 C (106.0 F)
201144.4 C (111.9 F)
201241.7 C (107.1 F)
201340.0 C (104.0 F)
201438.3 C (100.9 F)
201540.6 C (105.1 F)
201641.1 C (106.0 F)
201736.7 C (98.1 F)
201842.8 C (109.0 F)
201938.3 C (100.9 F)
202038.9 C (102.0 F)
202137.8 C (100.0 F)
202241.7 C (107.1 F)
202335.6 C (96.1 F)
202438.9 C (102.0 F)
202539.4 C (102.9 F)
202640.6 C (105.1 F)

Coldest night (TNn)

Coldest night (TNn) at Mt Vernon by year The coldest night of the year at Mt Vernon, 1966 to 2026. The record is -20.6 C (-5.1 F) in 1989, marked on the chart; the median year is -9.4 C (15.1 F). -25-20-15-10-50197019801990200020102020Record: -20.6 C (-5.1 F) in 1989
The coldest night of the year at Mt Vernon, 1966 to 2026. The record is -20.6 C (-5.1 F) in 1989, marked on the chart; the median year is -9.4 C (15.1 F).
Coldest night (TNn) at Mt Vernon by year
YearColdest night (TNn)
1966-11.1 C (12.0 F)
1967-9.4 C (15.1 F)
1968-11.7 C (10.9 F)
1969-8.9 C (16.0 F)
1970-12.2 C (10.0 F)
1971-11.7 C (10.9 F)
1972-10.0 C (14.0 F)
1973-12.2 C (10.0 F)
1974-9.4 C (15.1 F)
1975-9.4 C (15.1 F)
1976-13.3 C (8.1 F)
1977-13.3 C (8.1 F)
1978-11.7 C (10.9 F)
1979-12.8 C (9.0 F)
1980-11.7 C (10.9 F)
1981-13.3 C (8.1 F)
1982-16.7 C (1.9 F)
1983-16.1 C (3.0 F)
1984-13.3 C (8.1 F)
1985-15.6 C (3.9 F)
1986-7.8 C (18.0 F)
1987-5.0 C (23.0 F)
1988-8.9 C (16.0 F)
1989-20.6 C (-5.1 F)
1990-11.7 C (10.9 F)
1991-5.6 C (21.9 F)
1992-8.9 C (16.0 F)
1993-6.1 C (21.0 F)
1994-7.8 C (18.0 F)
1995-10.0 C (14.0 F)
1996-15.0 C (5.0 F)
1997-8.9 C (16.0 F)
1998-7.2 C (19.0 F)
1999-9.4 C (15.1 F)
2000-7.2 C (19.0 F)
2001-8.9 C (16.0 F)
2002-10.0 C (14.0 F)
2003-7.8 C (18.0 F)
2004-7.8 C (18.0 F)
2005-6.7 C (19.9 F)
2006-9.4 C (15.1 F)
2007-7.2 C (19.0 F)
2008-8.3 C (17.1 F)
2009-7.2 C (19.0 F)
2010-12.2 C (10.0 F)
2011-10.6 C (12.9 F)
2012-6.1 C (21.0 F)
2013-5.6 C (21.9 F)
2014-9.4 C (15.1 F)
2015-8.9 C (16.0 F)
2016-9.4 C (15.1 F)
2017-10.6 C (12.9 F)
2018-11.7 C (10.9 F)
2019-5.0 C (23.0 F)
2020-3.3 C (26.1 F)
2021-17.2 C (1.0 F)
2022-11.7 C (10.9 F)
2023-2.8 C (27.0 F)
2024-12.8 C (9.0 F)
2025-11.7 C (10.9 F)
2026-10.6 C (12.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Mt Vernon by year The wettest day of the year at Mt Vernon, 1966 to 2026. The record is 213.9 mm (8.4 in) in 2015, marked on the chart; the median year is 91.4 mm (3.6 in). 050100150200250197019801990200020102020Record: 213.9 mm (8.4 in) in 2015
The wettest day of the year at Mt Vernon, 1966 to 2026. The record is 213.9 mm (8.4 in) in 2015, marked on the chart; the median year is 91.4 mm (3.6 in).
Wettest day (Rx1day) at Mt Vernon by year
YearWettest day (Rx1day)
196678.0 mm (3.1 in)
1967124.5 mm (4.9 in)
196852.3 mm (2.1 in)
196973.7 mm (2.9 in)
197082.0 mm (3.2 in)
197190.4 mm (3.6 in)
197258.7 mm (2.3 in)
1973122.4 mm (4.8 in)
197497.3 mm (3.8 in)
197586.4 mm (3.4 in)
197677.2 mm (3.0 in)
1977146.3 mm (5.8 in)
197853.6 mm (2.1 in)
197984.3 mm (3.3 in)
198062.0 mm (2.4 in)
1981102.9 mm (4.1 in)
1982119.4 mm (4.7 in)
198349.3 mm (1.9 in)
198481.8 mm (3.2 in)
1985115.1 mm (4.5 in)
198687.6 mm (3.4 in)
198795.0 mm (3.7 in)
198898.8 mm (3.9 in)
1989108.0 mm (4.3 in)
1990154.9 mm (6.1 in)
1991111.3 mm (4.4 in)
1992124.2 mm (4.9 in)
1993107.2 mm (4.2 in)
199485.3 mm (3.4 in)
199563.2 mm (2.5 in)
1996127.5 mm (5.0 in)
1997123.2 mm (4.9 in)
1998107.2 mm (4.2 in)
199951.3 mm (2.0 in)
2000102.9 mm (4.1 in)
2001107.2 mm (4.2 in)
2002148.1 mm (5.8 in)
200362.5 mm (2.5 in)
200496.3 mm (3.8 in)
200585.3 mm (3.4 in)
200666.0 mm (2.6 in)
200766.3 mm (2.6 in)
200886.6 mm (3.4 in)
2009100.1 mm (3.9 in)
2010109.2 mm (4.3 in)
201171.1 mm (2.8 in)
201280.8 mm (3.2 in)
201371.1 mm (2.8 in)
2014111.5 mm (4.4 in)
2015213.9 mm (8.4 in)
201691.4 mm (3.6 in)
2017144.8 mm (5.7 in)
2018105.4 mm (4.1 in)
201974.9 mm (2.9 in)
202089.4 mm (3.5 in)
202167.8 mm (2.7 in)
2022130.0 mm (5.1 in)
202355.1 mm (2.2 in)
202499.3 mm (3.9 in)
2025102.6 mm (4.0 in)
202674.9 mm (2.9 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Mt Vernon by year The wettest five days of the year at Mt Vernon, 1966 to 2026. The record is 242.3 mm (9.5 in) in 1998, marked on the chart; the median year is 142.2 mm (5.6 in). 50100150200250197019801990200020102020Record: 242.3 mm (9.5 in) in 1998
The wettest five days of the year at Mt Vernon, 1966 to 2026. The record is 242.3 mm (9.5 in) in 1998, marked on the chart; the median year is 142.2 mm (5.6 in).
Wettest five days (Rx5day) at Mt Vernon by year
YearWettest five days (Rx5day)
1966103.1 mm (4.1 in)
1967134.7 mm (5.3 in)
196885.8 mm (3.4 in)
1969114.1 mm (4.5 in)
1970117.6 mm (4.6 in)
1971223.8 mm (8.8 in)
197286.6 mm (3.4 in)
1973200.1 mm (7.9 in)
1974122.9 mm (4.8 in)
1975154.3 mm (6.1 in)
1976115.3 mm (4.5 in)
1977167.6 mm (6.6 in)
1978106.6 mm (4.2 in)
1979149.3 mm (5.9 in)
1980142.2 mm (5.6 in)
1981161.9 mm (6.4 in)
1982126.6 mm (5.0 in)
1983113.9 mm (4.5 in)
1984189.9 mm (7.5 in)
1985129.6 mm (5.1 in)
1986122.4 mm (4.8 in)
1987153.2 mm (6.0 in)
1988170.2 mm (6.7 in)
1989183.7 mm (7.2 in)
1990161.0 mm (6.3 in)
1991213.9 mm (8.4 in)
1992185.9 mm (7.3 in)
1993190.3 mm (7.5 in)
199497.0 mm (3.8 in)
1995116.3 mm (4.6 in)
1996205.5 mm (8.1 in)
1997153.2 mm (6.0 in)
1998242.3 mm (9.5 in)
199984.5 mm (3.3 in)
2000196.9 mm (7.8 in)
2001162.6 mm (6.4 in)
2002153.2 mm (6.0 in)
200385.1 mm (3.4 in)
2004128.6 mm (5.1 in)
2005109.2 mm (4.3 in)
2006126.4 mm (5.0 in)
2007134.6 mm (5.3 in)
2008115.6 mm (4.6 in)
2009168.4 mm (6.6 in)
2010142.0 mm (5.6 in)
201183.1 mm (3.3 in)
2012119.6 mm (4.7 in)
2013126.2 mm (5.0 in)
2014116.9 mm (4.6 in)
2015218.7 mm (8.6 in)
2016214.9 mm (8.5 in)
2017175.8 mm (6.9 in)
2018222.3 mm (8.8 in)
2019161.6 mm (6.4 in)
2020123.5 mm (4.9 in)
2021131.6 mm (5.2 in)
2022182.6 mm (7.2 in)
2023156.2 mm (6.1 in)
2024216.7 mm (8.5 in)
2025160.8 mm (6.3 in)
202689.2 mm (3.5 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Mt Vernon by year The longest dry spell of the year at Mt Vernon, 1966 to 2026. The record is 47 days in 1999, marked on the chart; the median year is 26 days. 1020304050197019801990200020102020Record: 47 days in 1999
The longest dry spell of the year at Mt Vernon, 1966 to 2026. The record is 47 days in 1999, marked on the chart; the median year is 26 days.
Longest dry spell (CDD) at Mt Vernon by year
YearLongest dry spell (CDD)
196622 days
196716 days
196818 days
196921 days
197031 days
197123 days
197221 days
197315 days
197418 days
197530 days
197628 days
197735 days
197835 days
197926 days
198030 days
198130 days
198218 days
198326 days
198416 days
198533 days
198627 days
198726 days
198822 days
198923 days
199037 days
199120 days
199223 days
199338 days
199422 days
199532 days
199625 days
199721 days
199827 days
199947 days
200039 days
200128 days
200220 days
200327 days
200427 days
200525 days
200624 days
200732 days
200823 days
200919 days
201024 days
201128 days
201240 days
201319 days
201421 days
201542 days
201630 days
201746 days
201815 days
201918 days
202025 days
202130 days
202239 days
202317 days
202436 days
202526 days
202624 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

55 years with a frost

Across 55 years with a frost, the median last spring frost at Mt Vernon falls on 20 March and the median first autumn frost on 13 November, which leaves a median of 240 days between them.

Fitted over all years, the growing season changes by +4.2 days per decade at this station.

Frost dates and growing season at Mt Vernon
MeasureMedian, all yearsEarliest periodRecent period (1995 to 2025)Recent against earliestFitted trend
Last spring frost20 Marchn/a11 Marchn/a-3.3 days per decade
First autumn frost13 Novembern/a15 Novembern/a+0.8 days per decade
Growing days240 daysn/a252 daysn/a+4.2 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

58 years, 1967 to 2025

A day with at least 93.0 mm (3.7 in) of rain is expected about once in 2 years. A day with at least 182.0 mm (7.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Mt Vernon: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years93.0 mm (3.7 in)
5 years119.7 mm (4.7 in)
10 years136.1 mm (5.4 in)
25 years155.6 mm (6.1 in)
50 years169.2 mm (6.7 in)
100 years182.0 mm (7.2 in)Longer than the 58 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, 58 years of values from 1967 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: 213.9 mm (8.4 in) in 2015; 154.9 mm (6.1 in) in 1990; 148.1 mm (5.8 in) in 2002.

Station Changes

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

Climate Twins

2010 to 2025 against 1961 to 1990

Over 2010 to 2025, Mt Vernon had a mean temperature of 18.4 C (65.1 F) and 1,238.5 mm (48.8 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Shreveport (United States, 153 km away), Texarkana Webb Fld (United States, 118 km away) and Red Rvr Rsch STN (United States, 171 km away).

Climate twins of Mt Vernon: 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
ShreveportUnited States153 km (95 mi)18.4 C (65.2 F)1,171.7 mm (46.1 in)0.70
Texarkana Webb FldUnited States118 km (73 mi)18.1 C (64.5 F)1,180.2 mm (46.5 in)0.70
Red Rvr Rsch STNUnited States171 km (106 mi)17.9 C (64.2 F)1,223.2 mm (48.2 in)0.74

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 Mt Vernon standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Mt Vernon 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-13).