Built 2026-10-19 (19 October 2026)

Tony Grove Lake Weather Records (USS0011H36S)

Record envelope, standing records and threshold days for Tony Grove Lake (USS0011H36S), Utah, United States, with 49 years of record.

Key Facts for Tony Grove Lake

  • Tony Grove Lake (USS0011H36S) is a weather station in Utah, United States at 41.90 latitude and -111.63 longitude, 2,583 m (8,474 ft) above sea level.
  • The station reports from 1978 to 2026, 49 years of record.
  • 1,464 records set at Tony Grove Lake still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Tony Grove Lake set a daily record precipitation of 27.9 mm (1.1 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, 41.90 latitude, -111.63 longitude.
  • Elevation: 2,583 m (8,474 ft).
  • Period of record: 1978 to 2026, 49 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

34 days at or beyond a record
Daily record high and record low at Tony Grove Lake, with 2026 drawn through them The band shows the record high and record low for each calendar day at Tony Grove Lake. The lines show the 2026 daily maximum and minimum. 34 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 Tony Grove Lake. The lines show the 2026 daily maximum and minimum. 34 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Tony Grove Lake, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan17.3 C (63.1 F)-25.3 C (-13.5 F)10.6 C (51.1 F)-15.9 C (3.4 F)
Feb13.4 C (56.1 F)-25.8 C (-14.4 F)13.4 C (56.1 F)-17.8 C (0.0 F)
Mar18.3 C (64.9 F)-19.6 C (-3.3 F)18.3 C (64.9 F)-13.0 C (8.6 F)
Apr21.6 C (70.9 F)-16.1 C (3.0 F)16.2 C (61.2 F)-11.8 C (10.8 F)
May25.1 C (77.2 F)-10.8 C (12.6 F)22.1 C (71.8 F)-6.3 C (20.7 F)
Jun28.8 C (83.8 F)-5.9 C (21.4 F)25.3 C (77.5 F)-2.0 C (28.4 F)
Jul31.4 C (88.5 F)0.3 C (32.5 F)31.4 C (88.5 F)8.1 C (46.6 F)
Aug29.3 C (84.7 F)0.0 C (32.0 F)28.9 C (84.0 F)7.8 C (46.0 F)
Sep29.0 C (84.2 F)-7.4 C (18.7 F)21.4 C (70.5 F)2.0 C (35.6 F)
Oct24.8 C (76.6 F)-20.0 C (-4.0 F)21.6 C (70.9 F)-0.2 C (31.6 F)
Nov16.0 C (60.8 F)-23.1 C (-9.6 F)n/an/a
Dec11.9 C (53.4 F)-24.8 C (-12.6 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Tony Grove Lake by the year they were set 1,464 records at Tony Grove Lake still stand. 2020 holds the most, with 84. 02550751002004: 522005: 402006: 662007: 742008: 782009: 802010: 752011: 442012: 552013: 652014: 572015: 792016: 532017: 602018: 452019: 502020: 842021: 602022: 782023: 482024: 842025: 752026: 6220042007201020132016201920222025
1,464 records at Tony Grove Lake still stand. 2020 holds the most, with 84.
Standing records at Tony Grove Lake by the year they were set
Year setStanding records
200452
200540
200666
200774
200878
200980
201075
201144
201255
201365
201457
201579
201653
201760
201845
201950
202084
202160
202278
202348
202484
202575
202662

Wettest Day of Each Month

Dec: 157.5 mm (6.2 in)
Record daily precipitation for each month at Tony Grove Lake The wettest day on record for each calendar month at Tony Grove Lake. The most was 157.5 mm (6.2 in) on 26 December 1983. 050100150200 Jan: 119.4 mm (4.7 in), 5 January 2022 Jan Feb: 83.8 mm (3.3 in), 16 February 1986 Feb Mar: 76.2 mm (3.0 in), 13 March 1984 Mar Apr: 58.4 mm (2.3 in), 19 April 1984 Apr May: 91.4 mm (3.6 in), 21 May 1981 May Jun: 38.1 mm (1.5 in), 2 June 1980 Jun Jul: 50.8 mm (2.0 in), 28 July 1982 Jul Aug: 38.1 mm (1.5 in), 14 August 1987 Aug Sep: 81.3 mm (3.2 in), 24 September 1986 Sep Oct: 78.7 mm (3.1 in), 24 October 2010 Oct Nov: 88.9 mm (3.5 in), 18 November 1996 Nov Dec: 157.5 mm (6.2 in), 26 December 1983 Dec
The wettest day on record for each calendar month at Tony Grove Lake. The most was 157.5 mm (6.2 in) on 26 December 1983.
Record daily precipitation for each month at Tony Grove Lake
MonthRecord daily precipitation (mm)Date
Jan119.4 mm (4.7 in)5 January 2022
Feb83.8 mm (3.3 in)16 February 1986
Mar76.2 mm (3.0 in)13 March 1984
Apr58.4 mm (2.3 in)19 April 1984
May91.4 mm (3.6 in)21 May 1981
Jun38.1 mm (1.5 in)2 June 1980
Jul50.8 mm (2.0 in)28 July 1982
Aug38.1 mm (1.5 in)14 August 1987
Sep81.3 mm (3.2 in)24 September 1986
Oct78.7 mm (3.1 in)24 October 2010
Nov88.9 mm (3.5 in)18 November 1996
Dec157.5 mm (6.2 in)26 December 1983

Period of Record Coverage

2004 to 2026
Days with data per year at Tony Grove Lake 23 years of record at Tony Grove Lake, 2004 to 2026. 1 years have data for under 90 percent of days and are left out of rankings: 2026. 2004: 331 of 366 days2005: 365 of 365 days2006: 364 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: 364 of 365 days2018: 365 of 365 days2019: 365 of 365 days2020: 366 of 366 days2021: 364 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 365 of 365 days2026: 286 of 365 days20052010201520202025
23 years of record at Tony Grove Lake, 2004 to 2026. 1 years have data for under 90 percent of days and are left out of rankings: 2026.
Days with data per year at Tony Grove Lake
YearDays with dataShare of yearComplete
200433190%Yes
2005365100%Yes
2006364100%Yes
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
2016366100%Yes
2017364100%Yes
2018365100%Yes
2019365100%Yes
2020366100%Yes
2021364100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
2025365100%Yes
202628678%No

Latest Records

20
Latest records at Tony Grove Lake
DateStationRecordValueBeat old record byOld record stoodSignificance
12 October 2026Tony Grove Lake, USdaily rain (Provisional)27.9 mm (1.1 in)5.0 mm (0.20 in)4 years9 of 100 (Routine)
11 October 2026Tony Grove Lake, USdaily rain (Provisional)27.9 mm (1.1 in)5.0 mm (0.20 in)15 years12 of 100 (Routine)
15 July 2026Tony Grove Lake, USdaily rain (Tie)2.5 mm (0.10 in)tie29 years3 of 100 (Routine)
27 June 2026Tony Grove Lake, USdaily rain (Tie)12.7 mm (0.5 in)tie12 years1 of 100 (Routine)
30 May 2026Tony Grove Lake, USdaily rain33.0 mm (1.3 in)15.2 mm (0.6 in)15 years26 of 100 (Routine)
23 April 2026Tony Grove Lake, USdaily rain (Tie)25.4 mm (1.0 in)tie5 years1 of 100 (Routine)
22 April 2026Tony Grove Lake, USdaily rain40.6 mm (1.6 in)10.1 mm (0.4 in)44 years29 of 100 (Routine)
24 February 2026Tony Grove Lake, USdaily rain50.8 mm (2.0 in)22.9 mm (0.9 in)18 years26 of 100 (Routine)
25 December 2025Tony Grove Lake, USdaily rain40.6 mm (1.6 in)7.6 mm (0.30 in)8 years11 of 100 (Routine)
26 October 2025Tony Grove Lake, USdaily rain (Tie)35.6 mm (1.4 in)tie15 years2 of 100 (Routine)
4 October 2025Tony Grove Lake, USdaily rain (Tie)30.5 mm (1.2 in)tie42 years4 of 100 (Routine)
27 August 2025Tony Grove Lake, USdaily rain30.5 mm (1.2 in)15.3 mm (0.6 in)34 years37 of 100 (Notable)
5 May 2025Tony Grove Lake, USdaily rain (Tie)15.2 mm (0.6 in)tie16 years2 of 100 (Routine)
15 March 2025Tony Grove Lake, USdaily rain33.0 mm (1.3 in)5.1 mm (0.20 in)32 years17 of 100 (Routine)
27 July 2024Tony Grove Lake, USdaily rain17.8 mm (0.7 in)10.2 mm (0.4 in)5 years16 of 100 (Routine)
17 January 2024Tony Grove Lake, USdaily rain (Tie)48.3 mm (1.9 in)tie28 years3 of 100 (Routine)
3 December 2023Tony Grove Lake, USdaily rain (Tie)50.8 mm (2.0 in)tie5 years1 of 100 (Routine)
2 December 2023Tony Grove Lake, USdaily rain58.4 mm (2.3 in)22.8 mm (0.9 in)40 years31 of 100 (Routine)
4 September 2023Tony Grove Lake, USdaily rain43.2 mm (1.7 in)28.0 mm (1.1 in)30 years36 of 100 (Notable)
3 August 2023Tony Grove Lake, USdaily rain20.3 mm (0.8 in)10.1 mm (0.4 in)34 years20 of 100 (Routine)

Climate Trend

21 complete years, 2005 to 2025
Annual mean temperature at Tony Grove Lake as warming stripes, 2005 to 2025 One stripe for each of 21 complete years at Tony Grove Lake, 2005 to 2025. Blue stripes are years cooler than the station's own mean of 4.2 C (39.5 F); red stripes are warmer. The coolest year was 2011, at 2.8 C (37.0 F), and the warmest was 2025, at 5.5 C (41.9 F). The strongest colour marks a difference of 1.4 C (2.5 F). 2005: 4.0 C, -0.1 C from the station mean2006: 3.7 C, -0.4 C from the station mean2007: 4.7 C, +0.6 C from the station mean2008: 3.1 C, -1.1 C from the station mean2009: 3.4 C, -0.7 C from the station mean2010: 3.4 C, -0.7 C from the station mean2011: 2.8 C, -1.4 C from the station mean2012: 4.9 C, +0.7 C from the station mean2013: 3.9 C, -0.3 C from the station mean2014: 4.1 C, -0.1 C from the station mean2015: 5.2 C, +1.0 C from the station mean2016: 4.7 C, +0.5 C from the station mean2017: 4.6 C, +0.4 C from the station mean2018: 4.4 C, +0.2 C from the station mean2019: 3.2 C, -1.0 C from the station mean2020: 4.3 C, +0.1 C from the station mean2021: 4.7 C, +0.5 C from the station mean2022: 4.0 C, -0.1 C from the station mean2023: 3.8 C, -0.4 C from the station mean2024: 4.9 C, +0.8 C from the station mean2025: 5.5 C, +1.3 C from the station mean2005200820102012201420162018202020222024
One stripe for each of 21 complete years at Tony Grove Lake, 2005 to 2025. Blue stripes are years cooler than the station's own mean of 4.2 C (39.5 F); red stripes are warmer. The coolest year was 2011, at 2.8 C (37.0 F), and the warmest was 2025, at 5.5 C (41.9 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Tony Grove Lake as warming stripes, 2005 to 2025
YearAnnual mean temperatureDifference from the station mean
20054.0 C-0.13 C
20063.7 C-0.44 C
20074.7 C+0.56 C
20083.1 C-1.09 C
20093.4 C-0.71 C
20103.4 C-0.74 C
20112.8 C-1.36 C
20124.9 C+0.74 C
20133.9 C-0.30 C
20144.1 C-0.10 C
20155.2 C+1.02 C
20164.7 C+0.55 C
20174.6 C+0.44 C
20184.4 C+0.24 C
20193.2 C-0.96 C
20204.3 C+0.13 C
20214.7 C+0.54 C
20224.0 C-0.14 C
20233.8 C-0.36 C
20244.9 C+0.78 C
20255.5 C+1.34 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

1978 to 2026
Yearly extremes at Tony Grove Lake: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)31.4 C (88.5 F)202628.7 C (83.7 F)23
Coldest night (TNn)-25.8 C (-14.4 F)2011-21.8 C (-7.2 F)23
Wettest day (Rx1day)157.5 mm (6.2 in)198361.0 mm (2.4 in)49
Wettest five days (Rx5day)386.0 mm (15.2 in)1986124.5 mm (4.9 in)49
Longest dry spell (CDD)99 days202532 days49

Hottest day (TXx)

Hottest day (TXx) at Tony Grove Lake by year The hottest day of the year at Tony Grove Lake, 1978 to 2026. The record is 31.4 C (88.5 F) in 2026, marked on the chart; the median year is 28.7 C (83.7 F). 2628303219801990200020102020Record: 31.4 C (88.5 F) in 2026
The hottest day of the year at Tony Grove Lake, 1978 to 2026. The record is 31.4 C (88.5 F) in 2026, marked on the chart; the median year is 28.7 C (83.7 F).
Hottest day (TXx) at Tony Grove Lake by year
YearHottest day (TXx)
1978n/a
1979n/a
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
2003n/a
200426.9 C (80.4 F)
200529.2 C (84.6 F)
200629.0 C (84.2 F)
200729.4 C (84.9 F)
200826.7 C (80.1 F)
200928.3 C (82.9 F)
201027.4 C (81.3 F)
201126.9 C (80.4 F)
201228.4 C (83.1 F)
201328.3 C (82.9 F)
201427.8 C (82.0 F)
201528.8 C (83.8 F)
201627.0 C (80.6 F)
201728.8 C (83.8 F)
201829.3 C (84.7 F)
201928.3 C (82.9 F)
202028.9 C (84.0 F)
202128.7 C (83.7 F)
202229.4 C (84.9 F)
202328.1 C (82.6 F)
202428.9 C (84.0 F)
202529.3 C (84.7 F)
202631.4 C (88.5 F)

Coldest night (TNn)

Coldest night (TNn) at Tony Grove Lake by year The coldest night of the year at Tony Grove Lake, 1978 to 2026. The record is -25.8 C (-14.4 F) in 2011, marked on the chart; the median year is -21.8 C (-7.2 F). -26-24-22-20-18-1619801990200020102020Record: -25.8 C (-14.4 F) in 2011
The coldest night of the year at Tony Grove Lake, 1978 to 2026. The record is -25.8 C (-14.4 F) in 2011, marked on the chart; the median year is -21.8 C (-7.2 F).
Coldest night (TNn) at Tony Grove Lake by year
YearColdest night (TNn)
1978n/a
1979n/a
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
2003n/a
2004-20.0 C (-4.0 F)
2005-22.6 C (-8.7 F)
2006-21.8 C (-7.2 F)
2007-23.5 C (-10.3 F)
2008-21.7 C (-7.1 F)
2009-24.1 C (-11.4 F)
2010-24.4 C (-11.9 F)
2011-25.8 C (-14.4 F)
2012-19.7 C (-3.5 F)
2013-25.3 C (-13.5 F)
2014-24.2 C (-11.6 F)
2015-19.6 C (-3.3 F)
2016-21.8 C (-7.2 F)
2017-21.6 C (-6.9 F)
2018-22.4 C (-8.3 F)
2019-21.9 C (-7.4 F)
2020-20.4 C (-4.7 F)
2021-20.2 C (-4.4 F)
2022-21.5 C (-6.7 F)
2023-23.2 C (-9.8 F)
2024-18.4 C (-1.1 F)
2025-22.7 C (-8.9 F)
2026-17.8 C (0.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Tony Grove Lake by year The wettest day of the year at Tony Grove Lake, 1978 to 2026. The record is 157.5 mm (6.2 in) in 1983, marked on the chart; the median year is 61.0 mm (2.4 in). 05010015020019801990200020102020Record: 157.5 mm (6.2 in) in 1983
The wettest day of the year at Tony Grove Lake, 1978 to 2026. The record is 157.5 mm (6.2 in) in 1983, marked on the chart; the median year is 61.0 mm (2.4 in).
Wettest day (Rx1day) at Tony Grove Lake by year
YearWettest day (Rx1day)
197868.6 mm (2.7 in)
197963.5 mm (2.5 in)
198086.4 mm (3.4 in)
198191.4 mm (3.6 in)
198263.5 mm (2.5 in)
1983157.5 mm (6.2 in)
198476.2 mm (3.0 in)
198553.3 mm (2.1 in)
198683.8 mm (3.3 in)
198748.3 mm (1.9 in)
198855.9 mm (2.2 in)
198958.4 mm (2.3 in)
199035.6 mm (1.4 in)
199178.7 mm (3.1 in)
199243.2 mm (1.7 in)
199376.2 mm (3.0 in)
199468.6 mm (2.7 in)
199576.2 mm (3.0 in)
199688.9 mm (3.5 in)
199755.9 mm (2.2 in)
199883.8 mm (3.3 in)
199935.6 mm (1.4 in)
200066.0 mm (2.6 in)
200166.0 mm (2.6 in)
200266.0 mm (2.6 in)
200371.1 mm (2.8 in)
200450.8 mm (2.0 in)
200555.9 mm (2.2 in)
200643.2 mm (1.7 in)
200745.7 mm (1.8 in)
200835.6 mm (1.4 in)
200961.0 mm (2.4 in)
201078.7 mm (3.1 in)
201158.4 mm (2.3 in)
201263.5 mm (2.5 in)
201333.0 mm (1.3 in)
201494.0 mm (3.7 in)
201548.3 mm (1.9 in)
201661.0 mm (2.4 in)
201781.3 mm (3.2 in)
201835.6 mm (1.4 in)
201953.3 mm (2.1 in)
202058.4 mm (2.3 in)
202140.6 mm (1.6 in)
2022119.4 mm (4.7 in)
202358.4 mm (2.3 in)
202450.8 mm (2.0 in)
202543.2 mm (1.7 in)
202650.8 mm (2.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Tony Grove Lake by year The wettest five days of the year at Tony Grove Lake, 1978 to 2026. The record is 386.0 mm (15.2 in) in 1986, marked on the chart; the median year is 124.5 mm (4.9 in). 010020030040019801990200020102020Record: 386.0 mm (15.2 in) in 1986
The wettest five days of the year at Tony Grove Lake, 1978 to 2026. The record is 386.0 mm (15.2 in) in 1986, marked on the chart; the median year is 124.5 mm (4.9 in).
Wettest five days (Rx5day) at Tony Grove Lake by year
YearWettest five days (Rx5day)
1978152.4 mm (6.0 in)
1979132.1 mm (5.2 in)
1980210.9 mm (8.3 in)
1981134.6 mm (5.3 in)
1982185.5 mm (7.3 in)
1983188.0 mm (7.4 in)
1984106.6 mm (4.2 in)
1985111.7 mm (4.4 in)
1986386.0 mm (15.2 in)
198768.6 mm (2.7 in)
1988104.2 mm (4.1 in)
1989121.9 mm (4.8 in)
199066.1 mm (2.6 in)
1991101.6 mm (4.0 in)
1992132.1 mm (5.2 in)
1993104.0 mm (4.1 in)
199494.0 mm (3.7 in)
1995147.3 mm (5.8 in)
1996134.6 mm (5.3 in)
1997134.6 mm (5.3 in)
1998170.2 mm (6.7 in)
1999116.8 mm (4.6 in)
200094.0 mm (3.7 in)
2001137.2 mm (5.4 in)
200296.5 mm (3.8 in)
200383.9 mm (3.3 in)
2004124.5 mm (4.9 in)
2005119.3 mm (4.7 in)
2006147.3 mm (5.8 in)
200781.2 mm (3.2 in)
200886.4 mm (3.4 in)
2009111.8 mm (4.4 in)
2010149.9 mm (5.9 in)
2011137.1 mm (5.4 in)
2012182.9 mm (7.2 in)
201376.1 mm (3.0 in)
2014134.6 mm (5.3 in)
2015116.9 mm (4.6 in)
2016144.8 mm (5.7 in)
2017253.9 mm (10.0 in)
201883.8 mm (3.3 in)
2019106.7 mm (4.2 in)
2020114.3 mm (4.5 in)
2021106.7 mm (4.2 in)
2022180.4 mm (7.1 in)
2023152.4 mm (6.0 in)
2024129.6 mm (5.1 in)
2025127.1 mm (5.0 in)
2026101.6 mm (4.0 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Tony Grove Lake by year The longest dry spell of the year at Tony Grove Lake, 1978 to 2026. The record is 99 days in 2025, marked on the chart; the median year is 32 days. 025507510019801990200020102020Record: 99 days in 2025
The longest dry spell of the year at Tony Grove Lake, 1978 to 2026. The record is 99 days in 2025, marked on the chart; the median year is 32 days.
Longest dry spell (CDD) at Tony Grove Lake by year
YearLongest dry spell (CDD)
197839 days
197958 days
198027 days
198123 days
198217 days
198321 days
198423 days
198532 days
198631 days
198734 days
198831 days
198921 days
199019 days
199136 days
199229 days
199318 days
199423 days
199519 days
199633 days
199725 days
199837 days
199938 days
200052 days
200132 days
200245 days
200331 days
200436 days
200534 days
200620 days
200745 days
200840 days
200934 days
201039 days
201127 days
201232 days
201335 days
201431 days
201525 days
201664 days
201727 days
201839 days
201936 days
202029 days
202165 days
202245 days
202327 days
202439 days
202599 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

21 years with a frost

Across 21 years with a frost, the median last spring frost at Tony Grove Lake falls on 13 June and the median first autumn frost on 19 September, which leaves a median of 103 days between them.

Frost dates and growing season at Tony Grove Lake
MeasureMedian, all yearsEarliest periodRecent period (2005 to 2025)Recent against earliestFitted trend
Last spring frost13 Junen/a13 Junen/an/a
First autumn frost19 Septembern/a19 Septembern/an/a
Growing days103 daysn/a103 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

47 years, 1979 to 2025

A day with at least 60.1 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 138.4 mm (5.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Tony Grove Lake: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years60.1 mm (2.4 in)
5 years79.8 mm (3.1 in)
10 years93.3 mm (3.7 in)
25 years111.0 mm (4.4 in)
50 years124.5 mm (4.9 in)Longer than the 47 years of record
100 years138.4 mm (5.4 in)Longer than the 47 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, 47 years of values from 1979 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: 157.5 mm (6.2 in) in 1983; 119.4 mm (4.7 in) in 2022; 94.0 mm (3.7 in) in 2014.

Download the Data

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