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Built 2026-10-19 (19 October 2026)

Donkey Reservoir Weather Records (USS0011L05S)

Record envelope, standing records and threshold days for Donkey Reservoir (USS0011L05S), Utah, United States, with 42 years of record.

Key Facts for Donkey Reservoir

  • Donkey Reservoir (USS0011L05S) is a weather station in Utah, United States at 38.21 latitude and -111.48 longitude, 2,987 m (9,800 ft) above sea level.
  • The station reports from 1985 to 2026, 42 years of record.
  • 1,464 records set at Donkey Reservoir still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Donkey Reservoir set a daily record precipitation of 30.5 mm (1.2 in) on 13 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, 38.21 latitude, -111.48 longitude.
  • Elevation: 2,987 m (9,800 ft).
  • Period of record: 1985 to 2026, 42 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

27 days at or beyond a record
Daily record high and record low at Donkey Reservoir, with 2026 drawn through them The band shows the record high and record low for each calendar day at Donkey Reservoir. The lines show the 2026 daily maximum and minimum. 27 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 Donkey Reservoir. The lines show the 2026 daily maximum and minimum. 27 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Donkey Reservoir, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan12.6 C (54.7 F)-34.1 C (-29.4 F)8.9 C (48.0 F)-24.4 C (-11.9 F)
Feb13.0 C (55.4 F)-29.6 C (-21.3 F)9.7 C (49.5 F)-25.7 C (-14.3 F)
Mar19.8 C (67.6 F)-26.5 C (-15.7 F)19.8 C (67.6 F)-16.0 C (3.2 F)
Apr19.9 C (67.8 F)-25.0 C (-13.0 F)15.2 C (59.4 F)-14.7 C (5.5 F)
May23.1 C (73.6 F)-15.2 C (4.6 F)21.0 C (69.8 F)-8.4 C (16.9 F)
Jun28.6 C (83.5 F)-7.0 C (19.4 F)26.7 C (80.1 F)-2.4 C (27.7 F)
Jul28.9 C (84.0 F)-1.8 C (28.8 F)28.4 C (83.1 F)-1.2 C (29.8 F)
Aug28.0 C (82.4 F)-3.2 C (26.2 F)27.6 C (81.7 F)1.1 C (34.0 F)
Sep27.0 C (80.6 F)-10.4 C (13.3 F)20.9 C (69.6 F)-2.2 C (28.0 F)
Oct20.7 C (69.3 F)-24.1 C (-11.4 F)18.3 C (64.9 F)-5.1 C (22.8 F)
Nov16.3 C (61.3 F)-28.2 C (-18.8 F)n/an/a
Dec11.9 C (53.4 F)-32.1 C (-25.8 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Donkey Reservoir by the year they were set 1,464 records at Donkey Reservoir still stand. 2020 holds the most, with 91. 02550751002003: 312004: 722005: 542006: 642007: 562008: 572009: 622010: 532011: 632012: 592013: 562014: 492015: 722016: 572017: 742018: 652019: 652020: 912021: 612022: 852023: 432024: 492025: 772026: 4920032006200920122015201820212024
1,464 records at Donkey Reservoir still stand. 2020 holds the most, with 91.
Standing records at Donkey Reservoir by the year they were set
Year setStanding records
200331
200472
200554
200664
200756
200857
200962
201053
201163
201259
201356
201449
201572
201657
201774
201865
201965
202091
202161
202285
202343
202449
202577
202649

Wettest Day of Each Month

Jul: 73.7 mm (2.9 in)
Record daily precipitation for each month at Donkey Reservoir The wettest day on record for each calendar month at Donkey Reservoir. The most was 73.7 mm (2.9 in) on 14 July 2015. 020406080 Jan: 40.6 mm (1.6 in), 30 January 1993 Jan Feb: 35.6 mm (1.4 in), 19 February 1990 Feb Mar: 63.5 mm (2.5 in), 15 March 2024 Mar Apr: 45.7 mm (1.8 in), 2 April 1997 Apr May: 30.5 mm (1.2 in), 11 May 2014 May Jun: 20.3 mm (0.8 in), 3 June 2005 Jun Jul: 73.7 mm (2.9 in), 14 July 2015 Jul Aug: 43.2 mm (1.7 in), 14 August 1991 Aug Sep: 38.1 mm (1.5 in), 8 September 1997 Sep Oct: 53.3 mm (2.1 in), 6 October 2006 Oct Nov: 43.2 mm (1.7 in), 28 November 2019 Nov Dec: 33.0 mm (1.3 in), 1 December 2011 Dec
The wettest day on record for each calendar month at Donkey Reservoir. The most was 73.7 mm (2.9 in) on 14 July 2015.
Record daily precipitation for each month at Donkey Reservoir
MonthRecord daily precipitation (mm)Date
Jan40.6 mm (1.6 in)30 January 1993
Feb35.6 mm (1.4 in)19 February 1990
Mar63.5 mm (2.5 in)15 March 2024
Apr45.7 mm (1.8 in)2 April 1997
May30.5 mm (1.2 in)11 May 2014
Jun20.3 mm (0.8 in)3 June 2005
Jul73.7 mm (2.9 in)14 July 2015
Aug43.2 mm (1.7 in)14 August 1991
Sep38.1 mm (1.5 in)8 September 1997
Oct53.3 mm (2.1 in)6 October 2006
Nov43.2 mm (1.7 in)28 November 2019
Dec33.0 mm (1.3 in)1 December 2011

Period of Record Coverage

2003 to 2026
Days with data per year at Donkey Reservoir 24 years of record at Donkey Reservoir, 2003 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 2003, 2023, 2026. 2003: 171 of 365 days2004: 366 of 366 days2005: 365 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: 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: 184 of 365 days2024: 336 of 366 days2025: 365 of 365 days2026: 287 of 365 days20052010201520202025
24 years of record at Donkey Reservoir, 2003 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 2003, 2023, 2026.
Days with data per year at Donkey Reservoir
YearDays with dataShare of yearComplete
200317147%No
2004366100%Yes
2005365100%Yes
2006365100%Yes
2007365100%Yes
2008366100%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
202318450%No
202433692%Yes
2025365100%Yes
202628779%No

Latest Records

20
Latest records at Donkey Reservoir
DateStationRecordValueBeat old record byOld record stoodSignificance
13 October 2026Donkey Reservoir, USdaily rain (Provisional)30.5 mm (1.2 in)25.4 mm (1.0 in)32 years48 of 100 (Notable)
11 October 2026Donkey Reservoir, USdaily rain (Provisional)43.2 mm (1.7 in)2.6 mm (0.10 in)40 years19 of 100 (Routine)
31 August 2026Donkey Reservoir, USdaily rain (Provisional)15.2 mm (0.6 in)2.5 mm (0.10 in)12 years11 of 100 (Routine)
26 August 2026Donkey Reservoir, USdaily rain (Provisional)12.7 mm (0.5 in)2.5 mm (0.10 in)29 years16 of 100 (Routine)
12 August 2026Donkey Reservoir, USdaily rain38.1 mm (1.5 in)22.9 mm (0.9 in)1 year42 of 100 (Notable)
11 August 2026Donkey Reservoir, USdaily rain17.8 mm (0.7 in)5.1 mm (0.20 in)12 years15 of 100 (Routine)
9 August 2026Donkey Reservoir, USdaily rain (Tie)10.2 mm (0.4 in)tie11 years1 of 100 (Routine)
14 April 2026Donkey Reservoir, USdaily rain7.6 mm (0.30 in)2.5 mm (0.10 in)16 years13 of 100 (Routine)
16 February 2026Donkey Reservoir, USdaily rain12.7 mm (0.5 in)5.1 mm (0.20 in)32 years20 of 100 (Routine)
24 December 2025Donkey Reservoir, USdaily rain (Tie)12.7 mm (0.5 in)tie8 years1 of 100 (Routine)
3 December 2025Donkey Reservoir, USdaily rain (Tie)2.5 mm (0.10 in)tie35 years3 of 100 (Routine)
16 November 2025Donkey Reservoir, USdaily rain (Tie)12.7 mm (0.5 in)tie10 years1 of 100 (Routine)
15 October 2025Donkey Reservoir, USdaily rain (Tie)7.6 mm (0.30 in)tie31 years3 of 100 (Routine)
9 October 2025Donkey Reservoir, USdaily rain15.2 mm (0.6 in)5.0 mm (0.20 in)24 years17 of 100 (Routine)
29 August 2025Donkey Reservoir, USdaily rain15.2 mm (0.6 in)7.6 mm (0.30 in)18 years20 of 100 (Routine)
24 August 2025Donkey Reservoir, USdaily rain22.9 mm (0.9 in)7.7 mm (0.30 in)28 years20 of 100 (Routine)
4 July 2025Donkey Reservoir, USdaily rain (Tie)2.5 mm (0.10 in)tie28 years3 of 100 (Routine)
7 June 2025Donkey Reservoir, USdaily rain (Tie)2.5 mm (0.10 in)tie32 years3 of 100 (Routine)
7 May 2025Donkey Reservoir, USdaily rain (Tie)7.6 mm (0.30 in)tie16 years2 of 100 (Routine)
6 May 2025Donkey Reservoir, USdaily rain10.2 mm (0.4 in)5.1 mm (0.20 in)32 years20 of 100 (Routine)

Climate Trend

20 complete years, 2004 to 2025
Annual mean temperature at Donkey Reservoir as warming stripes, 2004 to 2025 One stripe for each of 20 complete years at Donkey Reservoir, 2004 to 2025. Blue stripes are years cooler than the station's own mean of 2.8 C (37.0 F); red stripes are warmer. The coolest year was 2011, at 1.9 C (35.3 F), and the warmest was 2025, at 3.8 C (38.8 F). The strongest colour marks a difference of 1.1 C (2.0 F). 2004: 2.1 C, -0.7 C from the station mean2005: 2.6 C, -0.2 C from the station mean2006: 2.5 C, -0.3 C from the station mean2007: 2.9 C, +0.1 C from the station mean2008: 2.0 C, -0.8 C from the station mean2009: 2.3 C, -0.5 C from the station mean2010: 2.3 C, -0.5 C from the station mean2011: 1.9 C, -0.9 C from the station mean2012: 3.6 C, +0.8 C from the station mean2013: 2.0 C, -0.8 C from the station mean2014: 3.2 C, +0.4 C from the station mean2015: 3.2 C, +0.4 C from the station mean2016: 3.4 C, +0.6 C from the station mean2017: 3.8 C, +1.0 C from the station mean2018: 3.4 C, +0.6 C from the station mean2019: 2.2 C, -0.6 C from the station mean2020: 3.4 C, +0.6 C from the station mean2021: 3.2 C, +0.4 C from the station mean2022: 2.3 C, -0.5 C from the station mean2025: 3.8 C, +1.0 C from the station mean20042006200820102012201420162018202020222024
One stripe for each of 20 complete years at Donkey Reservoir, 2004 to 2025. Blue stripes are years cooler than the station's own mean of 2.8 C (37.0 F); red stripes are warmer. The coolest year was 2011, at 1.9 C (35.3 F), and the warmest was 2025, at 3.8 C (38.8 F). The strongest colour marks a difference of 1.1 C (2.0 F).
Annual mean temperature at Donkey Reservoir as warming stripes, 2004 to 2025
YearAnnual mean temperatureDifference from the station mean
20042.1 C-0.67 C
20052.6 C-0.18 C
20062.5 C-0.30 C
20072.9 C+0.12 C
20082.0 C-0.81 C
20092.3 C-0.48 C
20102.3 C-0.53 C
20111.9 C-0.94 C
20123.6 C+0.80 C
20132.0 C-0.84 C
20143.2 C+0.36 C
20153.2 C+0.37 C
20163.4 C+0.56 C
20173.8 C+1.00 C
20183.4 C+0.64 C
20192.2 C-0.58 C
20203.4 C+0.56 C
20213.2 C+0.39 C
20222.3 C-0.46 C
20253.8 C+1.01 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

1985 to 2026
Yearly extremes at Donkey Reservoir: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)28.9 C (84.0 F)202127.2 C (81.0 F)24
Coldest night (TNn)-34.1 C (-29.4 F)2013-28.2 C (-18.8 F)24
Wettest day (Rx1day)73.7 mm (2.9 in)201530.5 mm (1.2 in)42
Wettest five days (Rx5day)109.2 mm (4.3 in)201050.8 mm (2.0 in)42
Longest dry spell (CDD)65 days200229 days42

Hottest day (TXx)

Hottest day (TXx) at Donkey Reservoir by year The hottest day of the year at Donkey Reservoir, 1985 to 2026. The record is 28.9 C (84.0 F) in 2021, marked on the chart; the median year is 27.2 C (81.0 F). 242628301990200020102020Record: 28.9 C (84.0 F) in 2021
The hottest day of the year at Donkey Reservoir, 1985 to 2026. The record is 28.9 C (84.0 F) in 2021, marked on the chart; the median year is 27.2 C (81.0 F).
Hottest day (TXx) at Donkey Reservoir by year
YearHottest day (TXx)
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
200327.3 C (81.1 F)
200426.4 C (79.5 F)
200527.7 C (81.9 F)
200627.8 C (82.0 F)
200728.4 C (83.1 F)
200827.1 C (80.8 F)
200926.6 C (79.9 F)
201027.2 C (81.0 F)
201126.9 C (80.4 F)
201226.9 C (80.4 F)
201327.3 C (81.1 F)
201426.9 C (80.4 F)
201526.9 C (80.4 F)
201628.3 C (82.9 F)
201727.5 C (81.5 F)
201828.6 C (83.5 F)
201926.7 C (80.1 F)
202028.0 C (82.4 F)
202128.9 C (84.0 F)
202227.2 C (81.0 F)
202324.3 C (75.7 F)
202426.8 C (80.2 F)
202526.1 C (79.0 F)
202628.4 C (83.1 F)

Coldest night (TNn)

Coldest night (TNn) at Donkey Reservoir by year The coldest night of the year at Donkey Reservoir, 1985 to 2026. The record is -34.1 C (-29.4 F) in 2013, marked on the chart; the median year is -28.2 C (-18.8 F). -35-32.5-30-27.5-25-22.51990200020102020Record: -34.1 C (-29.4 F) in 2013
The coldest night of the year at Donkey Reservoir, 1985 to 2026. The record is -34.1 C (-29.4 F) in 2013, marked on the chart; the median year is -28.2 C (-18.8 F).
Coldest night (TNn) at Donkey Reservoir by year
YearColdest night (TNn)
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
2003-26.0 C (-14.8 F)
2004-27.9 C (-18.2 F)
2005-27.0 C (-16.6 F)
2006-27.0 C (-16.6 F)
2007-29.8 C (-21.6 F)
2008-29.2 C (-20.6 F)
2009-28.5 C (-19.3 F)
2010-28.2 C (-18.8 F)
2011-29.6 C (-21.3 F)
2012-25.3 C (-13.5 F)
2013-34.1 C (-29.4 F)
2014-28.2 C (-18.8 F)
2015-28.2 C (-18.8 F)
2016-28.6 C (-19.5 F)
2017-29.7 C (-21.5 F)
2018-26.7 C (-16.1 F)
2019-28.0 C (-18.4 F)
2020-28.7 C (-19.7 F)
2021-27.4 C (-17.3 F)
2022-28.4 C (-19.1 F)
2023-29.7 C (-21.5 F)
2024-25.7 C (-14.3 F)
2025-24.8 C (-12.6 F)
2026-25.7 C (-14.3 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Donkey Reservoir by year The wettest day of the year at Donkey Reservoir, 1985 to 2026. The record is 73.7 mm (2.9 in) in 2015, marked on the chart; the median year is 30.5 mm (1.2 in). 0204060801990200020102020Record: 73.7 mm (2.9 in) in 2015
The wettest day of the year at Donkey Reservoir, 1985 to 2026. The record is 73.7 mm (2.9 in) in 2015, marked on the chart; the median year is 30.5 mm (1.2 in).
Wettest day (Rx1day) at Donkey Reservoir by year
YearWettest day (Rx1day)
198525.4 mm (1.0 in)
198640.6 mm (1.6 in)
198733.0 mm (1.3 in)
198817.8 mm (0.7 in)
198933.0 mm (1.3 in)
199035.6 mm (1.4 in)
199143.2 mm (1.7 in)
199225.4 mm (1.0 in)
199340.6 mm (1.6 in)
199427.9 mm (1.1 in)
199535.6 mm (1.4 in)
199635.6 mm (1.4 in)
199745.7 mm (1.8 in)
199835.6 mm (1.4 in)
199917.8 mm (0.7 in)
200038.1 mm (1.5 in)
200122.9 mm (0.9 in)
200220.3 mm (0.8 in)
200330.5 mm (1.2 in)
200430.5 mm (1.2 in)
200520.3 mm (0.8 in)
200653.3 mm (2.1 in)
200730.5 mm (1.2 in)
200827.9 mm (1.1 in)
200920.3 mm (0.8 in)
201048.3 mm (1.9 in)
201133.0 mm (1.3 in)
201220.3 mm (0.8 in)
201338.1 mm (1.5 in)
201430.5 mm (1.2 in)
201573.7 mm (2.9 in)
201627.9 mm (1.1 in)
201725.4 mm (1.0 in)
201820.3 mm (0.8 in)
201943.2 mm (1.7 in)
202022.9 mm (0.9 in)
202143.2 mm (1.7 in)
202227.9 mm (1.1 in)
202320.3 mm (0.8 in)
202463.5 mm (2.5 in)
202522.9 mm (0.9 in)
202643.2 mm (1.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Donkey Reservoir by year The wettest five days of the year at Donkey Reservoir, 1985 to 2026. The record is 109.2 mm (4.3 in) in 2010, marked on the chart; the median year is 50.8 mm (2.0 in). 204060801001201990200020102020Record: 109.2 mm (4.3 in) in 2010
The wettest five days of the year at Donkey Reservoir, 1985 to 2026. The record is 109.2 mm (4.3 in) in 2010, marked on the chart; the median year is 50.8 mm (2.0 in).
Wettest five days (Rx5day) at Donkey Reservoir by year
YearWettest five days (Rx5day)
198540.7 mm (1.6 in)
198671.2 mm (2.8 in)
198750.7 mm (2.0 in)
198848.3 mm (1.9 in)
198945.7 mm (1.8 in)
199060.9 mm (2.4 in)
199150.8 mm (2.0 in)
199250.8 mm (2.0 in)
199393.9 mm (3.7 in)
199445.7 mm (1.8 in)
199555.9 mm (2.2 in)
199655.9 mm (2.2 in)
199778.7 mm (3.1 in)
199866.1 mm (2.6 in)
199943.2 mm (1.7 in)
200076.2 mm (3.0 in)
200135.5 mm (1.4 in)
200235.5 mm (1.4 in)
200350.8 mm (2.0 in)
200440.6 mm (1.6 in)
200533.0 mm (1.3 in)
200686.3 mm (3.4 in)
200758.5 mm (2.3 in)
200855.8 mm (2.2 in)
200940.5 mm (1.6 in)
2010109.2 mm (4.3 in)
201158.4 mm (2.3 in)
201238.1 mm (1.5 in)
201383.9 mm (3.3 in)
201443.2 mm (1.7 in)
201576.2 mm (3.0 in)
201643.2 mm (1.7 in)
201745.8 mm (1.8 in)
201855.8 mm (2.2 in)
201971.2 mm (2.8 in)
202035.5 mm (1.4 in)
202178.8 mm (3.1 in)
202233.0 mm (1.3 in)
202335.5 mm (1.4 in)
202491.5 mm (3.6 in)
202538.1 mm (1.5 in)
202699.1 mm (3.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Donkey Reservoir by year The longest dry spell of the year at Donkey Reservoir, 1985 to 2026. The record is 65 days in 2002, marked on the chart; the median year is 29 days. 0204060801990200020102020Record: 65 days in 2002
The longest dry spell of the year at Donkey Reservoir, 1985 to 2026. The record is 65 days in 2002, marked on the chart; the median year is 29 days.
Longest dry spell (CDD) at Donkey Reservoir by year
YearLongest dry spell (CDD)
198519 days
198629 days
198729 days
198821 days
198930 days
199026 days
199120 days
199228 days
199331 days
199419 days
199522 days
199623 days
199730 days
199820 days
199938 days
200031 days
200121 days
200265 days
200360 days
200428 days
200518 days
200653 days
200734 days
200825 days
200930 days
201028 days
201121 days
201230 days
201317 days
201442 days
201526 days
201632 days
201741 days
201839 days
201929 days
202046 days
202139 days
202245 days
202326 days
202422 days
202526 days
202637 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

20 years with a frost

Across 20 years with a frost, the median last spring frost at Donkey Reservoir falls on 21 June and the median first autumn frost on 27 August, which leaves a median of 70 days between them.

Frost dates and growing season at Donkey Reservoir
MeasureMedian, all yearsEarliest periodRecent period (2004 to 2025)Recent against earliestFitted trend
Last spring frost21 Junen/a21 Junen/an/a
First autumn frost27 Augustn/a27 Augustn/an/a
Growing days70 daysn/a70 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

40 years, 1986 to 2025

A day with at least 30.6 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 76.0 mm (3.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Donkey Reservoir: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years30.6 mm (1.2 in)
5 years41.3 mm (1.6 in)
10 years49.0 mm (1.9 in)
25 years59.3 mm (2.3 in)
50 years67.5 mm (2.7 in)Longer than the 40 years of record
100 years76.0 mm (3.0 in)Longer than the 40 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, 40 years of values from 1986 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 2015; 63.5 mm (2.5 in) in 2024; 53.3 mm (2.1 in) in 2006.

Download the Data

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