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Sullivan 3 SE - WFO Mkx Weather Records (USC00478316)

Record envelope, standing records and threshold days for Sullivan 3 SE - WFO Mkx (USC00478316), Wisconsin, United States, with 32 years of record.

Key Facts for Sullivan 3 SE - WFO Mkx

  • Sullivan 3 SE - WFO Mkx (USC00478316) is a weather station in Wisconsin, United States at 42.97 latitude and -88.55 longitude, 283 m (929 ft) above sea level.
  • The station reports from 1995 to 2026, 32 years of record.
  • 1,464 records set at Sullivan 3 SE - WFO Mkx still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Sullivan 3 SE - WFO Mkx set a daily record precipitation of 35.3 mm (1.4 in) on 20 September 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Wisconsin, United States, 42.97 latitude, -88.55 longitude.
  • Elevation: 283 m (929 ft).
  • Period of record: 1995 to 2026, 32 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

22 days at or beyond a record
Daily record high and record low at Sullivan 3 SE - WFO Mkx, with 2026 drawn through them The band shows the record high and record low for each calendar day at Sullivan 3 SE - WFO Mkx. The lines show the 2026 daily maximum and minimum. 22 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 Sullivan 3 SE - WFO Mkx. The lines show the 2026 daily maximum and minimum. 22 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Sullivan 3 SE - WFO Mkx, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan15.6 C (60.1 F)-34.4 C (-29.9 F)13.9 C (57.0 F)-28.3 C (-18.9 F)
Feb21.7 C (71.1 F)-33.9 C (-29.0 F)16.1 C (61.0 F)-20.0 C (-4.0 F)
Mar27.2 C (81.0 F)-25.0 C (-13.0 F)25.6 C (78.1 F)-15.0 C (5.0 F)
Apr31.7 C (89.1 F)-10.6 C (12.9 F)26.7 C (80.1 F)-7.2 C (19.0 F)
May35.0 C (95.0 F)-5.6 C (21.9 F)31.7 C (89.1 F)-3.3 C (26.1 F)
Jun37.2 C (99.0 F)0.6 C (33.1 F)32.8 C (91.0 F)7.2 C (45.0 F)
Jul41.1 C (106.0 F)5.0 C (41.0 F)35.0 C (95.0 F)8.3 C (46.9 F)
Aug36.7 C (98.1 F)4.4 C (39.9 F)29.4 C (84.9 F)8.9 C (48.0 F)
Sep35.6 C (96.1 F)-1.7 C (28.9 F)31.1 C (88.0 F)5.6 C (42.1 F)
Oct32.2 C (90.0 F)-7.2 C (19.0 F)27.8 C (82.0 F)3.9 C (39.0 F)
Nov23.9 C (75.0 F)-18.9 C (-2.0 F)n/an/a
Dec19.4 C (66.9 F)-26.7 C (-16.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Sullivan 3 SE - WFO Mkx by the year they were set 1,464 records at Sullivan 3 SE - WFO Mkx still stand. 1995 holds the most, with 72. 0204060801995: 721996: 511997: 391998: 511999: 482000: 692001: 592002: 492003: 452004: 472005: 452006: 442007: 382008: 412009: 432010: 342011: 322012: 382013: 432014: 592015: 512016: 222017: 592018: 392019: 442020: 372021: 632022: 452023: 412024: 442025: 372026: 3519951999200320072011201520192023
1,464 records at Sullivan 3 SE - WFO Mkx still stand. 1995 holds the most, with 72.
Standing records at Sullivan 3 SE - WFO Mkx by the year they were set
Year setStanding records
199572
199651
199739
199851
199948
200069
200159
200249
200345
200447
200545
200644
200738
200841
200943
201034
201132
201238
201343
201459
201551
201622
201759
201839
201944
202037
202163
202245
202341
202444
202537
202635

Wettest Day of Each Month

May: 125.2 mm (4.9 in)
Record daily precipitation for each month at Sullivan 3 SE - WFO Mkx The wettest day on record for each calendar month at Sullivan 3 SE - WFO Mkx. The most was 125.2 mm (4.9 in) on 12 May 2014. 050100150 Jan: 52.3 mm (2.1 in), 29 January 2013 Jan Feb: 41.7 mm (1.6 in), 27 February 2023 Feb Mar: 58.9 mm (2.3 in), 31 March 1998 Mar Apr: 61.0 mm (2.4 in), 23 April 1999 Apr May: 125.2 mm (4.9 in), 12 May 2014 May Jun: 96.5 mm (3.8 in), 8 June 2008 Jun Jul: 119.4 mm (4.7 in), 23 July 2010 Jul Aug: 103.9 mm (4.1 in), 19 August 2007 Aug Sep: 88.1 mm (3.5 in), 11 September 2022 Sep Oct: 52.1 mm (2.1 in), 26 October 2016 Oct Nov: 86.6 mm (3.4 in), 6 November 2005 Nov Dec: 35.3 mm (1.4 in), 28 December 2015 Dec
The wettest day on record for each calendar month at Sullivan 3 SE - WFO Mkx. The most was 125.2 mm (4.9 in) on 12 May 2014.
Record daily precipitation for each month at Sullivan 3 SE - WFO Mkx
MonthRecord daily precipitation (mm)Date
Jan52.3 mm (2.1 in)29 January 2013
Feb41.7 mm (1.6 in)27 February 2023
Mar58.9 mm (2.3 in)31 March 1998
Apr61.0 mm (2.4 in)23 April 1999
May125.2 mm (4.9 in)12 May 2014
Jun96.5 mm (3.8 in)8 June 2008
Jul119.4 mm (4.7 in)23 July 2010
Aug103.9 mm (4.1 in)19 August 2007
Sep88.1 mm (3.5 in)11 September 2022
Oct52.1 mm (2.1 in)26 October 2016
Nov86.6 mm (3.4 in)6 November 2005
Dec35.3 mm (1.4 in)28 December 2015

Period of Record Coverage

1995 to 2026
Days with data per year at Sullivan 3 SE - WFO Mkx 32 years of record at Sullivan 3 SE - WFO Mkx, 1995 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 2012, 2013, 2026. 1995: 365 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 364 of 365 days2000: 365 of 366 days2001: 363 of 365 days2002: 337 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 364 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 192 of 366 days2013: 276 of 365 days2014: 365 of 365 days2015: 364 of 365 days2016: 366 of 366 days2017: 363 of 365 days2018: 363 of 365 days2019: 364 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 364 of 365 days2026: 285 of 365 days1995200020052010201520202025
32 years of record at Sullivan 3 SE - WFO Mkx, 1995 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 2012, 2013, 2026.
Days with data per year at Sullivan 3 SE - WFO Mkx
YearDays with dataShare of yearComplete
1995365100%Yes
1996366100%Yes
1997365100%Yes
1998365100%Yes
1999364100%Yes
2000365100%Yes
200136399%Yes
200233792%Yes
2003365100%Yes
2004366100%Yes
2005364100%Yes
2006365100%Yes
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
201219252%No
201327676%No
2014365100%Yes
2015364100%Yes
2016366100%Yes
201736399%Yes
201836399%Yes
2019364100%Yes
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
2025364100%Yes
202628578%No

Latest Records

20
Latest records at Sullivan 3 SE - WFO Mkx
DateStationRecordValueBeat old record byOld record stoodSignificance
20 September 2026Sullivan 3 SE - WFO Mkx, USdaily rain (Provisional)35.3 mm (1.4 in)11.9 mm (0.5 in)8 years13 of 100 (Routine)
4 September 2026Sullivan 3 SE - WFO Mkx, USdaily high min (Tie, Provisional)20.6 C (69.1 F)tie8 years1 of 100 (Routine)
3 September 2026Sullivan 3 SE - WFO Mkx, USdaily high min (Provisional)22.2 C (72.0 F)1.6 C (2.9 F)11 years9 of 100 (Routine)
2 September 2026Sullivan 3 SE - WFO Mkx, USdaily high min (Provisional)21.7 C (71.1 F)2.3 C (4.1 F)25 years15 of 100 (Routine)
1 September 2026Sullivan 3 SE - WFO Mkx, USdaily high min (Tie, Provisional)21.1 C (70.0 F)tie25 years2 of 100 (Routine)
2 August 2026Sullivan 3 SE - WFO Mkx, USdaily low max20.6 C (69.1 F)3.3 C (5.9 F)8 years14 of 100 (Routine)
1 August 2026Sullivan 3 SE - WFO Mkx, USdaily rain74.9 mm (2.9 in)61.9 mm (2.4 in)23 years49 of 100 (Notable)
27 July 2026Sullivan 3 SE - WFO Mkx, USdaily high min22.2 C (72.0 F)0.5 C (0.9 F)28 years12 of 100 (Routine)
23 July 2026Sullivan 3 SE - WFO Mkx, USdaily low min (Tie)8.9 C (48.0 F)tie25 years2 of 100 (Routine)
22 July 2026Sullivan 3 SE - WFO Mkx, USdaily low min8.3 C (46.9 F)1.7 C (3.1 F)19 years12 of 100 (Routine)
1 July 2026Sullivan 3 SE - WFO Mkx, USdaily high min24.4 C (75.9 F)2.2 C (4.0 F)24 years16 of 100 (Routine)
30 June 2026Sullivan 3 SE - WFO Mkx, USmonthly high min (Tie)24.4 C (75.9 F)tie1 year3 of 100 (Routine)
27 June 2026Sullivan 3 SE - WFO Mkx, USdaily low max21.1 C (70.0 F)1.1 C (2.0 F)21 years11 of 100 (Routine)
25 June 2026Sullivan 3 SE - WFO Mkx, USdaily rain29.5 mm (1.2 in)14.8 mm (0.6 in)28 years21 of 100 (Routine)
24 June 2026Sullivan 3 SE - WFO Mkx, USdaily rain21.6 mm (0.9 in)9.9 mm (0.39 in)7 years12 of 100 (Routine)
23 June 2026Sullivan 3 SE - WFO Mkx, USdaily low min8.3 C (46.9 F)2.3 C (4.1 F)24 years15 of 100 (Routine)
22 June 2026Sullivan 3 SE - WFO Mkx, USdaily low max21.1 C (70.0 F)0.6 C (1.1 F)8 years6 of 100 (Routine)
18 June 2026Sullivan 3 SE - WFO Mkx, USdaily low max17.2 C (63.0 F)2.2 C (4.0 F)27 years15 of 100 (Routine)
15 June 2026Sullivan 3 SE - WFO Mkx, USdaily low max (Tie)19.4 C (66.9 F)tie24 years2 of 100 (Routine)
10 May 2026Sullivan 3 SE - WFO Mkx, USdaily low min0.0 C (32.0 F)0.6 C (1.1 F)9 years6 of 100 (Routine)

Climate Trend

28 complete years, 1995 to 2025
Annual mean temperature at Sullivan 3 SE - WFO Mkx as warming stripes, 1995 to 2025 One stripe for each of 28 complete years at Sullivan 3 SE - WFO Mkx, 1995 to 2025. Blue stripes are years cooler than the station's own mean of 8.5 C (47.2 F); red stripes are warmer. The coolest year was 2014, at 6.6 C (43.8 F), and the warmest was 1998, at 11.0 C (51.7 F). The strongest colour marks a difference of 2.5 C (4.5 F). 1995: 8.6 C, +0.1 C from the station mean1996: 7.4 C, -1.0 C from the station mean1997: 8.3 C, -0.1 C from the station mean1998: 11.0 C, +2.5 C from the station mean1999: 8.9 C, +0.4 C from the station mean2000: 8.2 C, -0.2 C from the station mean2001: 8.9 C, +0.4 C from the station mean2003: 7.7 C, -0.8 C from the station mean2004: 8.0 C, -0.4 C from the station mean2005: 8.7 C, +0.2 C from the station mean2006: 8.9 C, +0.5 C from the station mean2007: 8.4 C, -0.1 C from the station mean2008: 7.0 C, -1.5 C from the station mean2009: 7.4 C, -1.1 C from the station mean2010: 8.9 C, +0.4 C from the station mean2011: 8.2 C, -0.3 C from the station mean2014: 6.6 C, -1.9 C from the station mean2015: 8.6 C, +0.1 C from the station mean2016: 9.4 C, +1.0 C from the station mean2017: 9.0 C, +0.5 C from the station mean2018: 8.0 C, -0.5 C from the station mean2019: 7.4 C, -1.0 C from the station mean2020: 8.6 C, +0.1 C from the station mean2021: 9.2 C, +0.8 C from the station mean2022: 7.8 C, -0.6 C from the station mean2023: 9.5 C, +1.0 C from the station mean2024: 10.0 C, +1.5 C from the station mean2025: 8.4 C, -0.1 C from the station mean1995200020052010201520202025
One stripe for each of 28 complete years at Sullivan 3 SE - WFO Mkx, 1995 to 2025. Blue stripes are years cooler than the station's own mean of 8.5 C (47.2 F); red stripes are warmer. The coolest year was 2014, at 6.6 C (43.8 F), and the warmest was 1998, at 11.0 C (51.7 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Sullivan 3 SE - WFO Mkx as warming stripes, 1995 to 2025
YearAnnual mean temperatureDifference from the station mean
19958.6 C+0.12 C
19967.4 C-1.01 C
19978.3 C-0.13 C
199811.0 C+2.50 C
19998.9 C+0.45 C
20008.2 C-0.23 C
20018.9 C+0.43 C
20037.7 C-0.77 C
20048.0 C-0.43 C
20058.7 C+0.20 C
20068.9 C+0.49 C
20078.4 C-0.09 C
20087.0 C-1.47 C
20097.4 C-1.10 C
20108.9 C+0.43 C
20118.2 C-0.25 C
20146.6 C-1.87 C
20158.6 C+0.12 C
20169.4 C+0.97 C
20179.0 C+0.52 C
20188.0 C-0.49 C
20197.4 C-1.02 C
20208.6 C+0.14 C
20219.2 C+0.77 C
20227.8 C-0.62 C
20239.5 C+1.01 C
202410.0 C+1.53 C
20258.4 C-0.10 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

1995 to 2026
Yearly extremes at Sullivan 3 SE - WFO Mkx: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)41.1 C (106.0 F)199534.7 C (94.5 F)32
Coldest night (TNn)-34.4 C (-29.9 F)2019-25.8 C (-14.5 F)32
Wettest day (Rx1day)125.2 mm (4.9 in)201461.3 mm (2.4 in)32
Wettest five days (Rx5day)225.2 mm (8.9 in)200890.7 mm (3.6 in)32
Longest dry spell (CDD)29 days199618 days32

Hottest day (TXx)

Hottest day (TXx) at Sullivan 3 SE - WFO Mkx by year The hottest day of the year at Sullivan 3 SE - WFO Mkx, 1995 to 2026. The record is 41.1 C (106.0 F) in 1995, marked on the chart; the median year is 34.7 C (94.5 F). 3032.53537.54042.5200020102020Record: 41.1 C (106.0 F) in 1995
The hottest day of the year at Sullivan 3 SE - WFO Mkx, 1995 to 2026. The record is 41.1 C (106.0 F) in 1995, marked on the chart; the median year is 34.7 C (94.5 F).
Hottest day (TXx) at Sullivan 3 SE - WFO Mkx by year
YearHottest day (TXx)
199541.1 C (106.0 F)
199635.6 C (96.1 F)
199736.1 C (97.0 F)
199835.6 C (96.1 F)
199936.7 C (98.1 F)
200033.9 C (93.0 F)
200136.7 C (98.1 F)
200236.1 C (97.0 F)
200334.4 C (93.9 F)
200432.8 C (91.0 F)
200536.7 C (98.1 F)
200636.7 C (98.1 F)
200733.9 C (93.0 F)
200833.9 C (93.0 F)
200933.9 C (93.0 F)
201033.3 C (91.9 F)
201136.1 C (97.0 F)
201241.1 C (106.0 F)
201335.0 C (95.0 F)
201432.2 C (90.0 F)
201533.3 C (91.9 F)
201633.3 C (91.9 F)
201734.4 C (93.9 F)
201834.4 C (93.9 F)
201932.8 C (91.0 F)
202033.3 C (91.9 F)
202135.6 C (96.1 F)
202235.6 C (96.1 F)
202336.1 C (97.0 F)
202433.3 C (91.9 F)
202533.3 C (91.9 F)
202635.0 C (95.0 F)

Coldest night (TNn)

Coldest night (TNn) at Sullivan 3 SE - WFO Mkx by year The coldest night of the year at Sullivan 3 SE - WFO Mkx, 1995 to 2026. The record is -34.4 C (-29.9 F) in 2019, marked on the chart; the median year is -25.8 C (-14.5 F). -35-30-25-20-15200020102020Record: -34.4 C (-29.9 F) in 2019
The coldest night of the year at Sullivan 3 SE - WFO Mkx, 1995 to 2026. The record is -34.4 C (-29.9 F) in 2019, marked on the chart; the median year is -25.8 C (-14.5 F).
Coldest night (TNn) at Sullivan 3 SE - WFO Mkx by year
YearColdest night (TNn)
1995-21.7 C (-7.1 F)
1996-33.9 C (-29.0 F)
1997-25.0 C (-13.0 F)
1998-22.8 C (-9.0 F)
1999-29.4 C (-20.9 F)
2000-26.1 C (-15.0 F)
2001-19.4 C (-2.9 F)
2002-25.0 C (-13.0 F)
2003-22.8 C (-9.0 F)
2004-26.1 C (-15.0 F)
2005-23.3 C (-9.9 F)
2006-27.8 C (-18.0 F)
2007-28.3 C (-18.9 F)
2008-26.1 C (-15.0 F)
2009-30.6 C (-23.1 F)
2010-22.2 C (-8.0 F)
2011-25.6 C (-14.1 F)
2012-15.0 C (5.0 F)
2013-25.0 C (-13.0 F)
2014-28.3 C (-18.9 F)
2015-25.6 C (-14.1 F)
2016-26.7 C (-16.1 F)
2017-23.9 C (-11.0 F)
2018-25.6 C (-14.1 F)
2019-34.4 C (-29.9 F)
2020-26.1 C (-15.0 F)
2021-26.7 C (-16.1 F)
2022-27.2 C (-17.0 F)
2023-25.6 C (-14.1 F)
2024-25.6 C (-14.1 F)
2025-26.1 C (-15.0 F)
2026-28.3 C (-18.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Sullivan 3 SE - WFO Mkx by year The wettest day of the year at Sullivan 3 SE - WFO Mkx, 1995 to 2026. The record is 125.2 mm (4.9 in) in 2014, marked on the chart; the median year is 61.3 mm (2.4 in). 255075100125150200020102020Record: 125.2 mm (4.9 in) in 2014
The wettest day of the year at Sullivan 3 SE - WFO Mkx, 1995 to 2026. The record is 125.2 mm (4.9 in) in 2014, marked on the chart; the median year is 61.3 mm (2.4 in).
Wettest day (Rx1day) at Sullivan 3 SE - WFO Mkx by year
YearWettest day (Rx1day)
199597.3 mm (3.8 in)
199664.5 mm (2.5 in)
199753.8 mm (2.1 in)
199858.9 mm (2.3 in)
199961.0 mm (2.4 in)
200074.9 mm (2.9 in)
200150.3 mm (2.0 in)
200261.5 mm (2.4 in)
200358.2 mm (2.3 in)
200479.5 mm (3.1 in)
200586.6 mm (3.4 in)
200651.3 mm (2.0 in)
2007103.9 mm (4.1 in)
200896.5 mm (3.8 in)
200946.7 mm (1.8 in)
2010119.4 mm (4.7 in)
201138.4 mm (1.5 in)
201242.7 mm (1.7 in)
201352.3 mm (2.1 in)
2014125.2 mm (4.9 in)
201551.6 mm (2.0 in)
201652.1 mm (2.1 in)
2017107.7 mm (4.2 in)
201861.5 mm (2.4 in)
201934.8 mm (1.4 in)
202051.6 mm (2.0 in)
202135.8 mm (1.4 in)
202288.1 mm (3.5 in)
202354.9 mm (2.2 in)
202477.5 mm (3.1 in)
202582.8 mm (3.3 in)
202674.9 mm (2.9 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Sullivan 3 SE - WFO Mkx by year The wettest five days of the year at Sullivan 3 SE - WFO Mkx, 1995 to 2026. The record is 225.2 mm (8.9 in) in 2008, marked on the chart; the median year is 90.7 mm (3.6 in). 50100150200250200020102020Record: 225.2 mm (8.9 in) in 2008
The wettest five days of the year at Sullivan 3 SE - WFO Mkx, 1995 to 2026. The record is 225.2 mm (8.9 in) in 2008, marked on the chart; the median year is 90.7 mm (3.6 in).
Wettest five days (Rx5day) at Sullivan 3 SE - WFO Mkx by year
YearWettest five days (Rx5day)
1995126.5 mm (5.0 in)
1996116.1 mm (4.6 in)
199782.2 mm (3.2 in)
199883.9 mm (3.3 in)
199995.3 mm (3.8 in)
200091.0 mm (3.6 in)
200182.1 mm (3.2 in)
200273.0 mm (2.9 in)
200397.3 mm (3.8 in)
2004117.9 mm (4.6 in)
200588.4 mm (3.5 in)
200669.3 mm (2.7 in)
2007172.7 mm (6.8 in)
2008225.2 mm (8.9 in)
200980.2 mm (3.2 in)
2010149.2 mm (5.9 in)
201153.9 mm (2.1 in)
201253.3 mm (2.1 in)
2013100.4 mm (4.0 in)
2014130.6 mm (5.1 in)
201582.3 mm (3.2 in)
201666.8 mm (2.6 in)
2017130.1 mm (5.1 in)
2018123.0 mm (4.8 in)
201990.3 mm (3.6 in)
202085.8 mm (3.4 in)
202166.5 mm (2.6 in)
2022130.8 mm (5.1 in)
202361.2 mm (2.4 in)
202489.2 mm (3.5 in)
2025152.4 mm (6.0 in)
2026122.0 mm (4.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Sullivan 3 SE - WFO Mkx by year The longest dry spell of the year at Sullivan 3 SE - WFO Mkx, 1995 to 2026. The record is 29 days in 1996, marked on the chart; the median year is 18 days. 1015202530200020102020Record: 29 days in 1996
The longest dry spell of the year at Sullivan 3 SE - WFO Mkx, 1995 to 2026. The record is 29 days in 1996, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Sullivan 3 SE - WFO Mkx by year
YearLongest dry spell (CDD)
199527 days
199629 days
199715 days
199819 days
199925 days
200014 days
200119 days
200214 days
200322 days
200419 days
200518 days
200616 days
200726 days
200814 days
200925 days
201029 days
201116 days
201226 days
201318 days
201413 days
201521 days
201615 days
201715 days
201819 days
201918 days
202017 days
202121 days
202216 days
202312 days
202422 days
202515 days
202618 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

28 years with a frost

Across 28 years with a frost, the median last spring frost at Sullivan 3 SE - WFO Mkx falls on 4 May and the median first autumn frost on 7 October, which leaves a median of 161 days between them.

Fitted over all years, the growing season changes by +1.1 days per decade at this station.

Frost dates and growing season at Sullivan 3 SE - WFO Mkx
MeasureMedian, all yearsEarliest periodRecent period (1995 to 2025)Recent against earliestFitted trend
Last spring frost4 Mayn/a4 Mayn/a+4.0 days per decade
First autumn frost7 Octobern/a7 Octobern/a+5.1 days per decade
Growing days161 daysn/a161 daysn/a+1.1 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

30 years, 1995 to 2025

A day with at least 64.3 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 155.8 mm (6.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Sullivan 3 SE - WFO Mkx: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years64.3 mm (2.5 in)
5 years86.9 mm (3.4 in)
10 years102.5 mm (4.0 in)
25 years123.2 mm (4.9 in)
50 years139.3 mm (5.5 in)Longer than the 30 years of record
100 years155.8 mm (6.1 in)Longer than the 30 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, 30 years of values from 1995 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: 125.2 mm (4.9 in) in 2014; 119.4 mm (4.7 in) in 2010; 107.7 mm (4.2 in) in 2017.

Download the Data

  • Data for Sullivan 3 SE - WFO Mkx standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Sullivan 3 SE - WFO Mkx 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).