Built 2026-10-19 (19 October 2026)

Webster Flat Weather Records (USS0012M03S)

Record envelope, standing records and threshold days for Webster Flat (USS0012M03S), Utah, United States, with 47 years of record.

Key Facts for Webster Flat

  • Webster Flat (USS0012M03S) is a weather station in Utah, United States at 37.58 latitude and -112.90 longitude, 2,805 m (9,203 ft) above sea level.
  • The station reports from 1980 to 2026, 47 years of record.
  • 1,464 records set at Webster Flat still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Webster Flat set a daily record precipitation of 35.6 mm (1.4 in) on 12 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Utah, United States, 37.58 latitude, -112.90 longitude.
  • Elevation: 2,805 m (9,203 ft).
  • Period of record: 1980 to 2026, 47 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

39 days at or beyond a record
Daily record high and record low at Webster Flat, with 2026 drawn through them The band shows the record high and record low for each calendar day at Webster Flat. The lines show the 2026 daily maximum and minimum. 39 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Webster Flat. The lines show the 2026 daily maximum and minimum. 39 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Webster Flat, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan15.7 C (60.3 F)-24.4 C (-11.9 F)14.4 C (57.9 F)-14.4 C (6.1 F)
Feb17.3 C (63.1 F)-24.3 C (-11.7 F)15.4 C (59.7 F)-15.8 C (3.6 F)
Mar22.3 C (72.1 F)-17.4 C (0.7 F)22.3 C (72.1 F)-9.0 C (15.8 F)
Apr22.2 C (72.0 F)-14.2 C (6.4 F)16.1 C (61.0 F)-10.8 C (12.6 F)
May24.1 C (75.4 F)-9.3 C (15.3 F)21.8 C (71.2 F)-4.5 C (23.9 F)
Jun29.6 C (85.3 F)-3.2 C (26.2 F)25.4 C (77.7 F)0.6 C (33.1 F)
Jul30.1 C (86.2 F)4.1 C (39.4 F)27.4 C (81.3 F)4.1 C (39.4 F)
Aug29.8 C (85.6 F)3.5 C (38.3 F)27.9 C (82.2 F)6.8 C (44.2 F)
Sep29.2 C (84.6 F)-3.9 C (25.0 F)25.0 C (77.0 F)2.9 C (37.2 F)
Oct24.0 C (75.2 F)-17.1 C (1.2 F)22.0 C (71.6 F)-1.8 C (28.8 F)
Nov19.7 C (67.5 F)-18.7 C (-1.7 F)n/an/a
Dec17.6 C (63.7 F)-21.0 C (-5.8 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Webster Flat by the year they were set 1,464 records at Webster Flat still stand. 2015 holds the most, with 83. 02550751002003: 372004: 562005: 602006: 622007: 632008: 732009: 572010: 672011: 672012: 462013: 722014: 292015: 832016: 602017: 592018: 482019: 612020: 822021: 662022: 662023: 492024: 672025: 692026: 6520032006200920122015201820212024
1,464 records at Webster Flat still stand. 2015 holds the most, with 83.
Standing records at Webster Flat by the year they were set
Year setStanding records
200337
200456
200560
200662
200763
200873
200957
201067
201167
201246
201372
201429
201583
201660
201759
201848
201961
202082
202166
202266
202349
202467
202569
202665

All-Time Record Progression

1 new records
When Webster Flat set new all-time records 1 all-time records were set at Webster Flat between 18 August 2021 and 18 August 2021. Each dot is a new record. Record daily precipitation18 August 2021: Record daily precipitation 91.4 mm (3.6 in)
1 all-time records were set at Webster Flat between 18 August 2021 and 18 August 2021. Each dot is a new record.
When Webster Flat set new all-time records
DateKindDetail
2021-08-18Record daily precipitationRecord daily precipitation 91.4 mm (3.6 in)

Wettest Day of Each Month

Aug: 91.4 mm (3.6 in)
Record daily precipitation for each month at Webster Flat The wettest day on record for each calendar month at Webster Flat. The most was 91.4 mm (3.6 in) on 18 August 2021. 0255075100 Jan: 53.3 mm (2.1 in), 1 January 2023 Jan Feb: 48.3 mm (1.9 in), 19 February 2011 Feb Mar: 58.4 mm (2.3 in), 3 March 1983 Mar Apr: 38.1 mm (1.5 in), 19 April 1984 Apr May: 53.3 mm (2.1 in), 16 May 1993 May Jun: 33.0 mm (1.3 in), 5 June 1993 Jun Jul: 53.3 mm (2.1 in), 30 July 1984 Jul Aug: 91.4 mm (3.6 in), 18 August 2021 Aug Sep: 55.9 mm (2.2 in), 22 September 2007 Sep Oct: 86.4 mm (3.4 in), 20 October 2004 Oct Nov: 55.9 mm (2.2 in), 30 November 1982 Nov Dec: 68.6 mm (2.7 in), 24 December 2025 Dec
The wettest day on record for each calendar month at Webster Flat. The most was 91.4 mm (3.6 in) on 18 August 2021.
Record daily precipitation for each month at Webster Flat
MonthRecord daily precipitation (mm)Date
Jan53.3 mm (2.1 in)1 January 2023
Feb48.3 mm (1.9 in)19 February 2011
Mar58.4 mm (2.3 in)3 March 1983
Apr38.1 mm (1.5 in)19 April 1984
May53.3 mm (2.1 in)16 May 1993
Jun33.0 mm (1.3 in)5 June 1993
Jul53.3 mm (2.1 in)30 July 1984
Aug91.4 mm (3.6 in)18 August 2021
Sep55.9 mm (2.2 in)22 September 2007
Oct86.4 mm (3.4 in)20 October 2004
Nov55.9 mm (2.2 in)30 November 1982
Dec68.6 mm (2.7 in)24 December 2025

Period of Record Coverage

2003 to 2026
Days with data per year at Webster Flat 24 years of record at Webster Flat, 2003 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 2003, 2026. 2003: 153 of 365 days2004: 365 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 363 of 365 days2008: 365 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 365 of 365 days2018: 365 of 365 days2019: 365 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 364 of 365 days2023: 360 of 365 days2024: 366 of 366 days2025: 365 of 365 days2026: 287 of 365 days20052010201520202025
24 years of record at Webster Flat, 2003 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 2003, 2026.
Days with data per year at Webster Flat
YearDays with dataShare of yearComplete
200315342%No
2004365100%Yes
2005365100%Yes
2006365100%Yes
200736399%Yes
2008365100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
2016366100%Yes
2017365100%Yes
2018365100%Yes
2019365100%Yes
2020366100%Yes
2021365100%Yes
2022364100%Yes
202336099%Yes
2024366100%Yes
2025365100%Yes
202628779%No

Latest Records

20
Latest records at Webster Flat
DateStationRecordValueBeat old record byOld record stoodSignificance
12 October 2026Webster Flat, USdaily rain (Provisional)35.6 mm (1.4 in)10.2 mm (0.4 in)4 years13 of 100 (Routine)
11 October 2026Webster Flat, USdaily rain (Provisional)43.2 mm (1.7 in)10.2 mm (0.4 in)41 years24 of 100 (Routine)
28 September 2026Webster Flat, USdaily rain (Provisional)30.5 mm (1.2 in)20.3 mm (0.8 in)24 years30 of 100 (Routine)
14 August 2026Webster Flat, USdaily rain12.7 mm (0.5 in)2.5 mm (0.10 in)28 years14 of 100 (Routine)
13 August 2026Webster Flat, USdaily rain17.8 mm (0.7 in)5.1 mm (0.20 in)35 years19 of 100 (Routine)
19 July 2026Webster Flat, USdaily rain25.4 mm (1.0 in)12.7 mm (0.5 in)16 years24 of 100 (Routine)
14 July 2026Webster Flat, USdaily rain22.9 mm (0.9 in)7.7 mm (0.30 in)13 years17 of 100 (Routine)
13 April 2026Webster Flat, USdaily rain12.7 mm (0.5 in)7.6 mm (0.30 in)15 years18 of 100 (Routine)
18 February 2026Webster Flat, USdaily rain27.9 mm (1.1 in)2.5 mm (0.10 in)20 years12 of 100 (Routine)
16 February 2026Webster Flat, USdaily rain22.9 mm (0.9 in)2.6 mm (0.10 in)26 years13 of 100 (Routine)
24 December 2025Webster Flat, USmonthly rain68.6 mm (2.7 in)7.6 mm (0.30 in)15 years26 of 100 (Routine)
16 November 2025Webster Flat, USdaily rain40.6 mm (1.6 in)25.4 mm (1.0 in)10 years31 of 100 (Routine)
13 October 2025Webster Flat, USdaily rain17.8 mm (0.7 in)7.6 mm (0.30 in)42 years20 of 100 (Routine)
10 October 2025Webster Flat, USdaily rain73.7 mm (2.9 in)30.5 mm (1.2 in)24 years38 of 100 (Notable)
4 September 2025Webster Flat, USdaily rain27.9 mm (1.1 in)20.3 mm (0.8 in)28 years31 of 100 (Routine)
29 August 2025Webster Flat, USdaily rain (Tie)12.7 mm (0.5 in)tie24 years2 of 100 (Routine)
25 August 2025Webster Flat, USdaily rain (Tie)15.2 mm (0.6 in)tie43 years4 of 100 (Routine)
6 May 2025Webster Flat, USdaily rain (Tie)10.2 mm (0.4 in)tie20 years2 of 100 (Routine)
13 March 2025Webster Flat, USdaily rain (Tie)35.6 mm (1.4 in)tie4 years1 of 100 (Routine)
6 March 2025Webster Flat, USdaily rain (Tie)30.5 mm (1.2 in)tie27 years3 of 100 (Routine)

Climate Trend

22 complete years, 2004 to 2025
Annual mean temperature at Webster Flat as warming stripes, 2004 to 2025 One stripe for each of 22 complete years at Webster Flat, 2004 to 2025. Blue stripes are years cooler than the station's own mean of 6.5 C (43.6 F); red stripes are warmer. The coolest year was 2011, at 5.6 C (42.1 F), and the warmest was 2025, at 7.5 C (45.4 F). The strongest colour marks a difference of 1.1 C (2.0 F). 2004: 5.7 C, -0.7 C from the station mean2005: 6.1 C, -0.3 C from the station mean2006: 6.2 C, -0.2 C from the station mean2007: 6.6 C, +0.2 C from the station mean2008: 5.9 C, -0.6 C from the station mean2009: 6.1 C, -0.4 C from the station mean2010: 5.8 C, -0.6 C from the station mean2011: 5.6 C, -0.8 C from the station mean2012: 6.8 C, +0.4 C from the station mean2013: 6.0 C, -0.5 C from the station mean2014: 6.9 C, +0.4 C from the station mean2015: 6.9 C, +0.4 C from the station mean2016: 6.9 C, +0.4 C from the station mean2017: 7.1 C, +0.6 C from the station mean2018: 6.8 C, +0.3 C from the station mean2019: 5.7 C, -0.8 C from the station mean2020: 7.3 C, +0.8 C from the station mean2021: 7.0 C, +0.5 C from the station mean2022: 6.5 C, 0.0 C from the station mean2023: 5.7 C, -0.8 C from the station mean2024: 7.3 C, +0.8 C from the station mean2025: 7.5 C, +1.0 C from the station mean20042006200820102012201420162018202020222024
One stripe for each of 22 complete years at Webster Flat, 2004 to 2025. Blue stripes are years cooler than the station's own mean of 6.5 C (43.6 F); red stripes are warmer. The coolest year was 2011, at 5.6 C (42.1 F), and the warmest was 2025, at 7.5 C (45.4 F). The strongest colour marks a difference of 1.1 C (2.0 F).
Annual mean temperature at Webster Flat as warming stripes, 2004 to 2025
YearAnnual mean temperatureDifference from the station mean
20045.7 C-0.75 C
20056.1 C-0.33 C
20066.2 C-0.24 C
20076.6 C+0.15 C
20085.9 C-0.57 C
20096.1 C-0.39 C
20105.8 C-0.64 C
20115.6 C-0.85 C
20126.8 C+0.36 C
20136.0 C-0.51 C
20146.9 C+0.39 C
20156.9 C+0.42 C
20166.9 C+0.41 C
20177.1 C+0.59 C
20186.8 C+0.33 C
20195.7 C-0.80 C
20207.3 C+0.82 C
20217.0 C+0.54 C
20226.5 C+0.03 C
20235.7 C-0.77 C
20247.3 C+0.79 C
20257.5 C+1.00 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

1980 to 2026
Yearly extremes at Webster Flat: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)30.1 C (86.2 F)202127.7 C (81.9 F)24
Coldest night (TNn)-24.4 C (-11.9 F)2013-17.7 C (0.1 F)24
Wettest day (Rx1day)91.4 mm (3.6 in)202143.2 mm (1.7 in)47
Wettest five days (Rx5day)210.8 mm (8.3 in)200478.8 mm (3.1 in)47
Longest dry spell (CDD)77 days202035 days47

Hottest day (TXx)

Hottest day (TXx) at Webster Flat by year The hottest day of the year at Webster Flat, 1980 to 2026. The record is 30.1 C (86.2 F) in 2021, marked on the chart; the median year is 27.7 C (81.9 F). 242628303219801990200020102020Record: 30.1 C (86.2 F) in 2021
The hottest day of the year at Webster Flat, 1980 to 2026. The record is 30.1 C (86.2 F) in 2021, marked on the chart; the median year is 27.7 C (81.9 F).
Hottest day (TXx) at Webster Flat by year
YearHottest day (TXx)
1980n/a
1981n/a
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a
1987n/a
1988n/a
1989n/a
1990n/a
1991n/a
1992n/a
1993n/a
1994n/a
1995n/a
1996n/a
1997n/a
1998n/a
1999n/a
2000n/a
2001n/a
2002n/a
200326.0 C (78.8 F)
200426.4 C (79.5 F)
200527.1 C (80.8 F)
200626.6 C (79.9 F)
200727.9 C (82.2 F)
200825.8 C (78.4 F)
200927.8 C (82.0 F)
201026.8 C (80.2 F)
201127.0 C (80.6 F)
201227.4 C (81.3 F)
201328.9 C (84.0 F)
201426.0 C (78.8 F)
201527.6 C (81.7 F)
201628.8 C (83.8 F)
201728.0 C (82.4 F)
201827.2 C (81.0 F)
201926.0 C (78.8 F)
202029.8 C (85.6 F)
202130.1 C (86.2 F)
202228.3 C (82.9 F)
202328.6 C (83.5 F)
202428.4 C (83.1 F)
202528.3 C (82.9 F)
202627.9 C (82.2 F)

Coldest night (TNn)

Coldest night (TNn) at Webster Flat by year The coldest night of the year at Webster Flat, 1980 to 2026. The record is -24.4 C (-11.9 F) in 2013, marked on the chart; the median year is -17.7 C (0.1 F). -25-22.5-20-17.5-1519801990200020102020Record: -24.4 C (-11.9 F) in 2013
The coldest night of the year at Webster Flat, 1980 to 2026. The record is -24.4 C (-11.9 F) in 2013, marked on the chart; the median year is -17.7 C (0.1 F).
Coldest night (TNn) at Webster Flat by year
YearColdest night (TNn)
1980n/a
1981n/a
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a
1987n/a
1988n/a
1989n/a
1990n/a
1991n/a
1992n/a
1993n/a
1994n/a
1995n/a
1996n/a
1997n/a
1998n/a
1999n/a
2000n/a
2001n/a
2002n/a
2003-17.0 C (1.4 F)
2004-18.5 C (-1.3 F)
2005-15.4 C (4.3 F)
2006-18.0 C (-0.4 F)
2007-22.5 C (-8.5 F)
2008-20.1 C (-4.2 F)
2009-19.4 C (-2.9 F)
2010-21.0 C (-5.8 F)
2011-24.3 C (-11.7 F)
2012-16.5 C (2.3 F)
2013-24.4 C (-11.9 F)
2014-17.6 C (0.3 F)
2015-16.6 C (2.1 F)
2016-17.5 C (0.5 F)
2017-18.0 C (-0.4 F)
2018-20.0 C (-4.0 F)
2019-19.3 C (-2.7 F)
2020-17.2 C (1.0 F)
2021-15.0 C (5.0 F)
2022-17.8 C (0.0 F)
2023-17.4 C (0.7 F)
2024-17.0 C (1.4 F)
2025-16.3 C (2.7 F)
2026-15.8 C (3.6 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Webster Flat by year The wettest day of the year at Webster Flat, 1980 to 2026. The record is 91.4 mm (3.6 in) in 2021, marked on the chart; the median year is 43.2 mm (1.7 in). 2040608010019801990200020102020Record: 91.4 mm (3.6 in) in 2021
The wettest day of the year at Webster Flat, 1980 to 2026. The record is 91.4 mm (3.6 in) in 2021, marked on the chart; the median year is 43.2 mm (1.7 in).
Wettest day (Rx1day) at Webster Flat by year
YearWettest day (Rx1day)
198022.9 mm (0.9 in)
198133.0 mm (1.3 in)
198255.9 mm (2.2 in)
198358.4 mm (2.3 in)
198453.3 mm (2.1 in)
198545.7 mm (1.8 in)
198635.6 mm (1.4 in)
198738.1 mm (1.5 in)
198835.6 mm (1.4 in)
198950.8 mm (2.0 in)
199040.6 mm (1.6 in)
199130.5 mm (1.2 in)
199261.0 mm (2.4 in)
199353.3 mm (2.1 in)
199435.6 mm (1.4 in)
199543.2 mm (1.7 in)
199635.6 mm (1.4 in)
199735.6 mm (1.4 in)
199833.0 mm (1.3 in)
199933.0 mm (1.3 in)
200043.2 mm (1.7 in)
200138.1 mm (1.5 in)
200243.2 mm (1.7 in)
200330.5 mm (1.2 in)
200486.4 mm (3.4 in)
200543.2 mm (1.7 in)
200650.8 mm (2.0 in)
200755.9 mm (2.2 in)
200848.3 mm (1.9 in)
200927.9 mm (1.1 in)
201066.0 mm (2.6 in)
201153.3 mm (2.1 in)
201248.3 mm (1.9 in)
201335.6 mm (1.4 in)
201455.9 mm (2.2 in)
201540.6 mm (1.6 in)
201655.9 mm (2.2 in)
201735.6 mm (1.4 in)
201838.1 mm (1.5 in)
201955.9 mm (2.2 in)
202035.6 mm (1.4 in)
202191.4 mm (3.6 in)
202238.1 mm (1.5 in)
202353.3 mm (2.1 in)
202450.8 mm (2.0 in)
202573.7 mm (2.9 in)
202643.2 mm (1.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Webster Flat by year The wettest five days of the year at Webster Flat, 1980 to 2026. The record is 210.8 mm (8.3 in) in 2004, marked on the chart; the median year is 78.8 mm (3.1 in). 05010015020025019801990200020102020Record: 210.8 mm (8.3 in) in 2004
The wettest five days of the year at Webster Flat, 1980 to 2026. The record is 210.8 mm (8.3 in) in 2004, marked on the chart; the median year is 78.8 mm (3.1 in).
Wettest five days (Rx5day) at Webster Flat by year
YearWettest five days (Rx5day)
198035.6 mm (1.4 in)
198163.4 mm (2.5 in)
1982106.7 mm (4.2 in)
1983147.3 mm (5.8 in)
198478.7 mm (3.1 in)
198566.1 mm (2.6 in)
198696.5 mm (3.8 in)
198778.8 mm (3.1 in)
198878.8 mm (3.1 in)
198963.5 mm (2.5 in)
199060.9 mm (2.4 in)
199166.1 mm (2.6 in)
199273.6 mm (2.9 in)
1993101.5 mm (4.0 in)
199455.9 mm (2.2 in)
199588.8 mm (3.5 in)
1996104.2 mm (4.1 in)
199758.4 mm (2.3 in)
199871.1 mm (2.8 in)
199953.3 mm (2.1 in)
200089.0 mm (3.5 in)
200163.5 mm (2.5 in)
200273.7 mm (2.9 in)
200358.5 mm (2.3 in)
2004210.8 mm (8.3 in)
2005137.2 mm (5.4 in)
200688.9 mm (3.5 in)
200766.0 mm (2.6 in)
200891.4 mm (3.6 in)
200953.3 mm (2.1 in)
2010195.7 mm (7.7 in)
201191.4 mm (3.6 in)
201286.3 mm (3.4 in)
201376.2 mm (3.0 in)
201468.6 mm (2.7 in)
201594.0 mm (3.7 in)
201688.9 mm (3.5 in)
201786.3 mm (3.4 in)
201866.0 mm (2.6 in)
2019134.7 mm (5.3 in)
202068.6 mm (2.7 in)
2021142.2 mm (5.6 in)
202268.6 mm (2.7 in)
202386.4 mm (3.4 in)
202491.4 mm (3.6 in)
2025111.8 mm (4.4 in)
2026106.7 mm (4.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Webster Flat by year The longest dry spell of the year at Webster Flat, 1980 to 2026. The record is 77 days in 2020, marked on the chart; the median year is 35 days. 02040608019801990200020102020Record: 77 days in 2020
The longest dry spell of the year at Webster Flat, 1980 to 2026. The record is 77 days in 2020, marked on the chart; the median year is 35 days.
Longest dry spell (CDD) at Webster Flat by year
YearLongest dry spell (CDD)
198013 days
198125 days
198228 days
198324 days
198422 days
198523 days
198638 days
198726 days
198821 days
198936 days
199021 days
199137 days
199225 days
199341 days
199456 days
199534 days
199643 days
199737 days
199818 days
199935 days
200023 days
200128 days
200250 days
200369 days
200435 days
200522 days
200623 days
200735 days
200847 days
200934 days
201043 days
201125 days
201271 days
201342 days
201442 days
201522 days
201618 days
201754 days
201845 days
201932 days
202077 days
202162 days
202252 days
202335 days
202457 days
202527 days
202636 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

22 years with a frost

Across 22 years with a frost, the median last spring frost at Webster Flat falls on 29 May and the median first autumn frost on 2 October, which leaves a median of 124 days between them.

Frost dates and growing season at Webster Flat
MeasureMedian, all yearsEarliest periodRecent period (2004 to 2025)Recent against earliestFitted trend
Last spring frost29 Mayn/a29 Mayn/an/a
First autumn frost2 Octobern/a2 Octobern/an/a
Growing days124 daysn/a124 daysn/an/a

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

45 years, 1981 to 2025

A day with at least 43.7 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 96.4 mm (3.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Webster Flat: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years43.7 mm (1.7 in)
5 years55.8 mm (2.2 in)
10 years64.6 mm (2.5 in)
25 years76.5 mm (3.0 in)
50 years86.2 mm (3.4 in)Longer than the 45 years of record
100 years96.4 mm (3.8 in)Longer than the 45 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, 45 years of values from 1981 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: 91.4 mm (3.6 in) in 2021; 86.4 mm (3.4 in) in 2004; 73.7 mm (2.9 in) in 2025.

Download the Data

  • Data for Webster Flat standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Webster Flat 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-17).