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Built 2026-10-19 (19 October 2026)

Castle Valley Weather Records (USS0012M13S)

Record envelope, standing records and threshold days for Castle Valley (USS0012M13S), Utah, United States, with 47 years of record.

Key Facts for Castle Valley

  • Castle Valley (USS0012M13S) is a weather station in Utah, United States at 37.66 latitude and -112.74 longitude, 2,920 m (9,580 ft) above sea level.
  • The station reports from 1980 to 2026, 47 years of record.
  • 1,464 records set at Castle Valley still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Castle Valley set a daily record precipitation of 43.2 mm (1.7 in) on 11 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, 37.66 latitude, -112.74 longitude.
  • Elevation: 2,920 m (9,580 ft).
  • Period of record: 1980 to 2026, 47 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

35 days at or beyond a record
Daily record high and record low at Castle Valley, with 2026 drawn through them The band shows the record high and record low for each calendar day at Castle Valley. The lines show the 2026 daily maximum and minimum. 35 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 Castle Valley. The lines show the 2026 daily maximum and minimum. 35 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Castle Valley, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan13.7 C (56.7 F)-29.4 C (-20.9 F)11.9 C (53.4 F)-15.3 C (4.5 F)
Feb16.4 C (61.5 F)-26.8 C (-16.2 F)16.4 C (61.5 F)-21.8 C (-7.2 F)
Mar21.9 C (71.4 F)-22.2 C (-8.0 F)21.9 C (71.4 F)-12.1 C (10.2 F)
Apr19.6 C (67.3 F)-22.8 C (-9.0 F)15.1 C (59.2 F)-12.2 C (10.0 F)
May23.2 C (73.8 F)-10.8 C (12.6 F)20.8 C (69.4 F)-7.1 C (19.2 F)
Jun28.0 C (82.4 F)-4.7 C (23.5 F)24.0 C (75.2 F)0.6 C (33.1 F)
Jul28.7 C (83.7 F)0.3 C (32.5 F)27.9 C (82.2 F)1.6 C (34.9 F)
Aug27.8 C (82.0 F)-0.5 C (31.1 F)26.1 C (79.0 F)3.7 C (38.7 F)
Sep26.9 C (80.4 F)-6.3 C (20.7 F)22.2 C (72.0 F)-0.4 C (31.3 F)
Oct22.3 C (72.1 F)-17.6 C (0.3 F)20.6 C (69.1 F)-2.9 C (26.8 F)
Nov18.4 C (65.1 F)-21.7 C (-7.1 F)n/an/a
Dec15.4 C (59.7 F)-29.6 C (-21.3 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Castle Valley by the year they were set 1,464 records at Castle Valley still stand. 2015 holds the most, with 87. 02550751002003: 352004: 622005: 602006: 502007: 512008: 532009: 652010: 642011: 632012: 592013: 692014: 392015: 872016: 692017: 712018: 622019: 592020: 812021: 592022: 682023: 502024: 552025: 652026: 6820032006200920122015201820212024
1,464 records at Castle Valley still stand. 2015 holds the most, with 87.
Standing records at Castle Valley by the year they were set
Year setStanding records
200335
200462
200560
200650
200751
200853
200965
201064
201163
201259
201369
201439
201587
201669
201771
201862
201959
202081
202159
202268
202350
202455
202565
202668

Wettest Day of Each Month

Jul: 73.7 mm (2.9 in)
Record daily precipitation for each month at Castle Valley The wettest day on record for each calendar month at Castle Valley. The most was 73.7 mm (2.9 in) on 30 July 1983. 020406080 Jan: 55.9 mm (2.2 in), 21 January 2010 Jan Feb: 40.6 mm (1.6 in), 19 February 2011 Feb Mar: 66.0 mm (2.6 in), 3 March 1983 Mar Apr: 38.1 mm (1.5 in), 20 April 1988 Apr May: 27.9 mm (1.1 in), 20 May 1981 May Jun: 66.0 mm (2.6 in), 11 June 1983 Jun Jul: 73.7 mm (2.9 in), 30 July 1983 Jul Aug: 63.5 mm (2.5 in), 18 August 2021 Aug Sep: 66.0 mm (2.6 in), 20 September 1994 Sep Oct: 63.5 mm (2.5 in), 20 October 2004 Oct Nov: 55.9 mm (2.2 in), 21 November 2010 Nov Dec: 45.7 mm (1.8 in), 29 December 2004 Dec
The wettest day on record for each calendar month at Castle Valley. The most was 73.7 mm (2.9 in) on 30 July 1983.
Record daily precipitation for each month at Castle Valley
MonthRecord daily precipitation (mm)Date
Jan55.9 mm (2.2 in)21 January 2010
Feb40.6 mm (1.6 in)19 February 2011
Mar66.0 mm (2.6 in)3 March 1983
Apr38.1 mm (1.5 in)20 April 1988
May27.9 mm (1.1 in)20 May 1981
Jun66.0 mm (2.6 in)11 June 1983
Jul73.7 mm (2.9 in)30 July 1983
Aug63.5 mm (2.5 in)18 August 2021
Sep66.0 mm (2.6 in)20 September 1994
Oct63.5 mm (2.5 in)20 October 2004
Nov55.9 mm (2.2 in)21 November 2010
Dec45.7 mm (1.8 in)29 December 2004

Period of Record Coverage

2003 to 2026
Days with data per year at Castle Valley 24 years of record at Castle Valley, 2003 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 2003, 2026. 2003: 211 of 365 days2004: 364 of 366 days2005: 363 of 365 days2006: 362 of 365 days2007: 364 of 365 days2008: 366 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: 364 of 365 days2019: 365 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 363 of 365 days2023: 365 of 365 days2024: 365 of 366 days2025: 365 of 365 days2026: 287 of 365 days20052010201520202025
24 years of record at Castle Valley, 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 Castle Valley
YearDays with dataShare of yearComplete
200321158%No
200436499%Yes
200536399%Yes
200636299%Yes
2007364100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
2016366100%Yes
2017365100%Yes
2018364100%Yes
2019365100%Yes
2020366100%Yes
2021365100%Yes
202236399%Yes
2023365100%Yes
2024365100%Yes
2025365100%Yes
202628779%No

Latest Records

20
Latest records at Castle Valley
DateStationRecordValueBeat old record byOld record stoodSignificance
11 October 2026Castle Valley, USdaily rain (Provisional)43.2 mm (1.7 in)28.0 mm (1.1 in)44 years50 of 100 (Notable)
28 September 2026Castle Valley, USdaily rain (Provisional)33.0 mm (1.3 in)20.3 mm (0.8 in)21 years31 of 100 (Routine)
16 September 2026Castle Valley, USdaily rain (Tie, Provisional)15.2 mm (0.6 in)tie29 years3 of 100 (Routine)
16 July 2026Castle Valley, USdaily rain27.9 mm (1.1 in)10.1 mm (0.4 in)40 years27 of 100 (Routine)
14 July 2026Castle Valley, USdaily rain (Tie)20.3 mm (0.8 in)tie33 years3 of 100 (Routine)
13 April 2026Castle Valley, USdaily rain10.2 mm (0.4 in)5.1 mm (0.20 in)43 years20 of 100 (Routine)
16 November 2025Castle Valley, USdaily rain17.8 mm (0.7 in)10.2 mm (0.4 in)31 years20 of 100 (Routine)
10 October 2025Castle Valley, USdaily rain (Tie)30.5 mm (1.2 in)tie24 years2 of 100 (Routine)
9 October 2025Castle Valley, USdaily rain (Tie)10.2 mm (0.4 in)tie12 years1 of 100 (Routine)
29 August 2025Castle Valley, USdaily rain20.3 mm (0.8 in)12.7 mm (0.5 in)39 years20 of 100 (Routine)
17 July 2025Castle Valley, USdaily rain15.2 mm (0.6 in)2.5 mm (0.10 in)39 years17 of 100 (Routine)
4 June 2025Castle Valley, USdaily rain38.1 mm (1.5 in)20.3 mm (0.8 in)16 years35 of 100 (Notable)
1 June 2025Castle Valley, USdaily rain (Tie)5.1 mm (0.20 in)tie34 years3 of 100 (Routine)
6 May 2025Castle Valley, USdaily rain7.6 mm (0.30 in)2.5 mm (0.10 in)39 years19 of 100 (Routine)
4 May 2025Castle Valley, USdaily rain12.7 mm (0.5 in)7.6 mm (0.30 in)18 years20 of 100 (Routine)
13 March 2025Castle Valley, USdaily rain22.9 mm (0.9 in)2.6 mm (0.10 in)4 years8 of 100 (Routine)
30 March 2024Castle Valley, USdaily rain25.4 mm (1.0 in)10.2 mm (0.4 in)32 years27 of 100 (Routine)
15 March 2024Castle Valley, USdaily rain35.6 mm (1.4 in)7.7 mm (0.30 in)37 years25 of 100 (Routine)
6 February 2024Castle Valley, USdaily rain27.9 mm (1.1 in)7.6 mm (0.30 in)13 years19 of 100 (Routine)
1 February 2024Castle Valley, USdaily rain25.4 mm (1.0 in)15.2 mm (0.6 in)33 years37 of 100 (Notable)

Climate Trend

21 complete years, 2004 to 2025
Annual mean temperature at Castle Valley as warming stripes, 2004 to 2025 One stripe for each of 21 complete years at Castle Valley, 2004 to 2025. Blue stripes are years cooler than the station's own mean of 4.6 C (40.4 F); red stripes are warmer. The coolest year was 2011, at 3.8 C (38.8 F), and the warmest was 2025, at 5.8 C (42.4 F). The strongest colour marks a difference of 1.2 C (2.2 F). 2004: 3.8 C, -0.9 C from the station mean2005: 4.2 C, -0.5 C from the station mean2006: 4.2 C, -0.4 C from the station mean2008: 4.1 C, -0.6 C from the station mean2009: 4.2 C, -0.5 C from the station mean2010: 4.1 C, -0.6 C from the station mean2011: 3.8 C, -0.9 C from the station mean2012: 5.1 C, +0.4 C from the station mean2013: 4.1 C, -0.6 C from the station mean2014: 5.1 C, +0.4 C from the station mean2015: 5.1 C, +0.4 C from the station mean2016: 5.2 C, +0.5 C from the station mean2017: 5.5 C, +0.8 C from the station mean2018: 5.0 C, +0.4 C from the station mean2019: 4.0 C, -0.6 C from the station mean2020: 5.4 C, +0.7 C from the station mean2021: 5.2 C, +0.5 C from the station mean2022: 4.7 C, 0.0 C from the station mean2023: 3.9 C, -0.8 C from the station mean2024: 5.4 C, +0.7 C from the station mean2025: 5.8 C, +1.1 C from the station mean20042006200820102012201420162018202020222024
One stripe for each of 21 complete years at Castle Valley, 2004 to 2025. Blue stripes are years cooler than the station's own mean of 4.6 C (40.4 F); red stripes are warmer. The coolest year was 2011, at 3.8 C (38.8 F), and the warmest was 2025, at 5.8 C (42.4 F). The strongest colour marks a difference of 1.2 C (2.2 F).
Annual mean temperature at Castle Valley as warming stripes, 2004 to 2025
YearAnnual mean temperatureDifference from the station mean
20043.8 C-0.85 C
20054.2 C-0.47 C
20064.2 C-0.40 C
20084.1 C-0.58 C
20094.2 C-0.47 C
20104.1 C-0.56 C
20113.8 C-0.86 C
20125.1 C+0.42 C
20134.1 C-0.59 C
20145.1 C+0.41 C
20155.1 C+0.42 C
20165.2 C+0.55 C
20175.5 C+0.84 C
20185.0 C+0.40 C
20194.0 C-0.60 C
20205.4 C+0.74 C
20215.2 C+0.53 C
20224.7 C+0.04 C
20233.9 C-0.77 C
20245.4 C+0.73 C
20255.8 C+1.12 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 Castle Valley: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)28.7 C (83.7 F)202126.3 C (79.3 F)24
Coldest night (TNn)-29.6 C (-21.3 F)2013-22.3 C (-8.1 F)24
Wettest day (Rx1day)73.7 mm (2.9 in)198335.6 mm (1.4 in)47
Wettest five days (Rx5day)126.9 mm (5.0 in)201963.4 mm (2.5 in)47
Longest dry spell (CDD)64 days198234 days47

Hottest day (TXx)

Hottest day (TXx) at Castle Valley by year The hottest day of the year at Castle Valley, 1980 to 2026. The record is 28.7 C (83.7 F) in 2021, marked on the chart; the median year is 26.3 C (79.3 F). 2426283019801990200020102020Record: 28.7 C (83.7 F) in 2021
The hottest day of the year at Castle Valley, 1980 to 2026. The record is 28.7 C (83.7 F) in 2021, marked on the chart; the median year is 26.3 C (79.3 F).
Hottest day (TXx) at Castle Valley 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
200327.0 C (80.6 F)
200424.0 C (75.2 F)
200525.9 C (78.6 F)
200625.4 C (77.7 F)
200725.8 C (78.4 F)
200824.2 C (75.6 F)
200926.3 C (79.3 F)
201026.2 C (79.2 F)
201125.0 C (77.0 F)
201225.8 C (78.4 F)
201328.0 C (82.4 F)
201425.2 C (77.4 F)
201526.1 C (79.0 F)
201626.9 C (80.4 F)
201726.6 C (79.9 F)
201825.8 C (78.4 F)
201924.9 C (76.8 F)
202027.8 C (82.0 F)
202128.7 C (83.7 F)
202226.5 C (79.7 F)
202327.4 C (81.3 F)
202428.2 C (82.8 F)
202527.3 C (81.1 F)
202627.9 C (82.2 F)

Coldest night (TNn)

Coldest night (TNn) at Castle Valley by year The coldest night of the year at Castle Valley, 1980 to 2026. The record is -29.6 C (-21.3 F) in 2013, marked on the chart; the median year is -22.3 C (-8.1 F). -30-25-20-1519801990200020102020Record: -29.6 C (-21.3 F) in 2013
The coldest night of the year at Castle Valley, 1980 to 2026. The record is -29.6 C (-21.3 F) in 2013, marked on the chart; the median year is -22.3 C (-8.1 F).
Coldest night (TNn) at Castle Valley 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
2003-18.3 C (-0.9 F)
2004-21.2 C (-6.2 F)
2005-20.4 C (-4.7 F)
2006-24.3 C (-11.7 F)
2007-27.1 C (-16.8 F)
2008-21.2 C (-6.2 F)
2009-25.7 C (-14.3 F)
2010-23.4 C (-10.1 F)
2011-25.4 C (-13.7 F)
2012-20.5 C (-4.9 F)
2013-29.6 C (-21.3 F)
2014-24.1 C (-11.4 F)
2015-23.2 C (-9.8 F)
2016-25.1 C (-13.2 F)
2017-23.4 C (-10.1 F)
2018-26.8 C (-16.2 F)
2019-20.9 C (-5.6 F)
2020-19.7 C (-3.5 F)
2021-19.3 C (-2.7 F)
2022-20.9 C (-5.6 F)
2023-22.8 C (-9.0 F)
2024-18.2 C (-0.8 F)
2025-18.3 C (-0.9 F)
2026-21.8 C (-7.2 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Castle Valley by year The wettest day of the year at Castle Valley, 1980 to 2026. The record is 73.7 mm (2.9 in) in 1983, marked on the chart; the median year is 35.6 mm (1.4 in). 02040608019801990200020102020Record: 73.7 mm (2.9 in) in 1983
The wettest day of the year at Castle Valley, 1980 to 2026. The record is 73.7 mm (2.9 in) in 1983, marked on the chart; the median year is 35.6 mm (1.4 in).
Wettest day (Rx1day) at Castle Valley by year
YearWettest day (Rx1day)
198017.8 mm (0.7 in)
198127.9 mm (1.1 in)
198263.5 mm (2.5 in)
198373.7 mm (2.9 in)
198425.4 mm (1.0 in)
198550.8 mm (2.0 in)
198633.0 mm (1.3 in)
198748.3 mm (1.9 in)
198838.1 mm (1.5 in)
198948.3 mm (1.9 in)
199025.4 mm (1.0 in)
199122.9 mm (0.9 in)
199233.0 mm (1.3 in)
199340.6 mm (1.6 in)
199466.0 mm (2.6 in)
199540.6 mm (1.6 in)
199625.4 mm (1.0 in)
199740.6 mm (1.6 in)
199835.6 mm (1.4 in)
199927.9 mm (1.1 in)
200030.5 mm (1.2 in)
200130.5 mm (1.2 in)
200227.9 mm (1.1 in)
200320.3 mm (0.8 in)
200463.5 mm (2.5 in)
200535.6 mm (1.4 in)
200638.1 mm (1.5 in)
200740.6 mm (1.6 in)
200830.5 mm (1.2 in)
200927.9 mm (1.1 in)
201058.4 mm (2.3 in)
201143.2 mm (1.7 in)
201233.0 mm (1.3 in)
201330.5 mm (1.2 in)
201458.4 mm (2.3 in)
201540.6 mm (1.6 in)
201640.6 mm (1.6 in)
201753.3 mm (2.1 in)
201827.9 mm (1.1 in)
201953.3 mm (2.1 in)
202025.4 mm (1.0 in)
202163.5 mm (2.5 in)
202227.9 mm (1.1 in)
202335.6 mm (1.4 in)
202435.6 mm (1.4 in)
202538.1 mm (1.5 in)
202643.2 mm (1.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Castle Valley by year The wettest five days of the year at Castle Valley, 1980 to 2026. The record is 126.9 mm (5.0 in) in 2019, marked on the chart; the median year is 63.4 mm (2.5 in). 25507510012515019801990200020102020Record: 126.9 mm (5.0 in) in 2019
The wettest five days of the year at Castle Valley, 1980 to 2026. The record is 126.9 mm (5.0 in) in 2019, marked on the chart; the median year is 63.4 mm (2.5 in).
Wettest five days (Rx5day) at Castle Valley by year
YearWettest five days (Rx5day)
198043.2 mm (1.7 in)
198153.3 mm (2.1 in)
198283.9 mm (3.3 in)
198386.4 mm (3.4 in)
198450.9 mm (2.0 in)
198561.0 mm (2.4 in)
198673.6 mm (2.9 in)
198773.7 mm (2.9 in)
198861.0 mm (2.4 in)
198961.0 mm (2.4 in)
199045.8 mm (1.8 in)
199148.3 mm (1.9 in)
199255.8 mm (2.2 in)
199368.6 mm (2.7 in)
199478.7 mm (3.1 in)
199563.5 mm (2.5 in)
199661.0 mm (2.4 in)
199753.3 mm (2.1 in)
199871.2 mm (2.8 in)
199968.5 mm (2.7 in)
200058.5 mm (2.3 in)
200155.9 mm (2.2 in)
200255.8 mm (2.2 in)
200345.7 mm (1.8 in)
2004116.8 mm (4.6 in)
200591.5 mm (3.6 in)
200663.4 mm (2.5 in)
200760.9 mm (2.4 in)
200868.5 mm (2.7 in)
200943.1 mm (1.7 in)
2010121.8 mm (4.8 in)
201163.5 mm (2.5 in)
201266.0 mm (2.6 in)
201381.3 mm (3.2 in)
201463.5 mm (2.5 in)
2015101.5 mm (4.0 in)
201655.8 mm (2.2 in)
201796.5 mm (3.8 in)
201850.8 mm (2.0 in)
2019126.9 mm (5.0 in)
202048.3 mm (1.9 in)
202181.3 mm (3.2 in)
202261.0 mm (2.4 in)
202381.2 mm (3.2 in)
202453.3 mm (2.1 in)
202560.9 mm (2.4 in)
202673.6 mm (2.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Castle Valley by year The longest dry spell of the year at Castle Valley, 1980 to 2026. The record is 64 days in 1982, marked on the chart; the median year is 34 days. 02040608019801990200020102020Record: 64 days in 1982
The longest dry spell of the year at Castle Valley, 1980 to 2026. The record is 64 days in 1982, marked on the chart; the median year is 34 days.
Longest dry spell (CDD) at Castle Valley by year
YearLongest dry spell (CDD)
198026 days
198126 days
198264 days
198340 days
198435 days
198520 days
198631 days
198734 days
198821 days
198936 days
199022 days
199115 days
199231 days
199340 days
199427 days
199532 days
199635 days
199734 days
199818 days
199944 days
200024 days
200145 days
200242 days
200348 days
200434 days
200530 days
200636 days
200733 days
200827 days
200920 days
201044 days
201126 days
201247 days
201336 days
201441 days
201535 days
201626 days
201751 days
201848 days
201922 days
202043 days
202139 days
202249 days
202328 days
202434 days
202538 days
202629 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

21 years with a frost

Across 21 years with a frost, the median last spring frost at Castle Valley falls on 13 June and the median first autumn frost on 16 September, which leaves a median of 94 days between them.

Frost dates and growing season at Castle Valley
MeasureMedian, all yearsEarliest periodRecent period (2004 to 2025)Recent against earliestFitted trend
Last spring frost13 Junen/a13 Junen/an/a
First autumn frost16 Septembern/a16 Septembern/an/a
Growing days94 daysn/a94 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 36.7 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 87.6 mm (3.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Castle Valley: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years36.7 mm (1.4 in)
5 years48.7 mm (1.9 in)
10 years57.2 mm (2.3 in)
25 years68.8 mm (2.7 in)
50 years78.0 mm (3.1 in)Longer than the 45 years of record
100 years87.6 mm (3.4 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: 73.7 mm (2.9 in) in 1983; 66.0 mm (2.6 in) in 1994; 63.5 mm (2.5 in) in 1982.

Download the Data

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