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Built 2026-10-19 (19 October 2026)

Diamond 2W Weather Records (USC00232240)

Record envelope, standing records and threshold days for Diamond 2W (USC00232240), Missouri, United States, with 54 years of record.

Key Facts for Diamond 2W

  • Diamond 2W (USC00232240) is a weather station in Missouri, United States at 36.99 latitude and -94.36 longitude, 326 m (1,070 ft) above sea level.
  • The station reports from 1973 to 2026, 54 years of record.
  • 1,464 records set at Diamond 2W still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Diamond 2W set a daily record precipitation of 51.3 mm (2.0 in) on 14 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Missouri, United States, 36.99 latitude, -94.36 longitude.
  • Elevation: 326 m (1,070 ft).
  • Period of record: 1973 to 2026, 54 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

55 days at or beyond a record
Daily record high and record low at Diamond 2W, with 2026 drawn through them The band shows the record high and record low for each calendar day at Diamond 2W. The lines show the 2026 daily maximum and minimum. 55 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 Diamond 2W. The lines show the 2026 daily maximum and minimum. 55 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Diamond 2W, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan24.4 C (75.9 F)-26.7 C (-16.1 F)22.2 C (72.0 F)-26.7 C (-16.1 F)
Feb30.0 C (86.0 F)-26.7 C (-16.1 F)26.7 C (80.1 F)-18.3 C (-0.9 F)
Mar35.0 C (95.0 F)-16.1 C (3.0 F)35.0 C (95.0 F)-10.6 C (12.9 F)
Apr33.3 C (91.9 F)-8.9 C (16.0 F)30.0 C (86.0 F)0.6 C (33.1 F)
May33.3 C (91.9 F)-0.6 C (30.9 F)32.2 C (90.0 F)2.2 C (36.0 F)
Jun39.4 C (102.9 F)6.7 C (44.1 F)33.3 C (91.9 F)12.8 C (55.0 F)
Jul42.2 C (108.0 F)8.3 C (46.9 F)37.2 C (99.0 F)17.2 C (63.0 F)
Aug43.3 C (109.9 F)8.3 C (46.9 F)40.0 C (104.0 F)14.4 C (57.9 F)
Sep40.0 C (104.0 F)-0.6 C (30.9 F)40.0 C (104.0 F)15.0 C (59.0 F)
Oct34.4 C (93.9 F)-8.9 C (16.0 F)34.4 C (93.9 F)6.7 C (44.1 F)
Nov30.0 C (86.0 F)-14.4 C (6.1 F)n/an/a
Dec27.2 C (81.0 F)-20.0 C (-4.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Diamond 2W by the year they were set 1,464 records at Diamond 2W still stand. 1996 holds the most, with 77. 0204060801993: 521994: 341995: 491996: 771997: 381998: 461999: 292000: 492001: 182002: 182003: 262004: 452005: 292006: 482007: 312008: 362009: 502010: 302011: 592012: 772013: 512014: 672015: 342016: 342017: 332018: 462019: 462020: 392021: 392022: 602023: 302024: 432025: 502026: 51199319972001200520092013201720212025
1,464 records at Diamond 2W still stand. 1996 holds the most, with 77.
Standing records at Diamond 2W by the year they were set
Year setStanding records
199352
199434
199549
199677
199738
199846
199929
200049
200118
200218
200326
200445
200529
200648
200731
200836
200950
201030
201159
201277
201351
201467
201534
201634
201733
201846
201946
202039
202139
202260
202330
202443
202550
202651

Wettest Day of Each Month

Sep: 165.1 mm (6.5 in)
Record daily precipitation for each month at Diamond 2W The wettest day on record for each calendar month at Diamond 2W. The most was 165.1 mm (6.5 in) on 30 September 1986. 050100150200 Jan: 78.7 mm (3.1 in), 18 January 1996 Jan Feb: 101.6 mm (4.0 in), 23 February 1985 Feb Mar: 92.5 mm (3.6 in), 20 March 2012 Mar Apr: 95.5 mm (3.8 in), 10 April 2008 Apr May: 153.7 mm (6.1 in), 1 May 2019 May Jun: 124.5 mm (4.9 in), 26 June 2021 Jun Jul: 119.4 mm (4.7 in), 3 July 1976 Jul Aug: 127.0 mm (5.0 in), 14 August 1980 Aug Sep: 165.1 mm (6.5 in), 30 September 1986 Sep Oct: 147.3 mm (5.8 in), 9 October 2009 Oct Nov: 139.7 mm (5.5 in), 25 November 1987 Nov Dec: 135.6 mm (5.3 in), 27 December 2015 Dec
The wettest day on record for each calendar month at Diamond 2W. The most was 165.1 mm (6.5 in) on 30 September 1986.
Record daily precipitation for each month at Diamond 2W
MonthRecord daily precipitation (mm)Date
Jan78.7 mm (3.1 in)18 January 1996
Feb101.6 mm (4.0 in)23 February 1985
Mar92.5 mm (3.6 in)20 March 2012
Apr95.5 mm (3.8 in)10 April 2008
May153.7 mm (6.1 in)1 May 2019
Jun124.5 mm (4.9 in)26 June 2021
Jul119.4 mm (4.7 in)3 July 1976
Aug127.0 mm (5.0 in)14 August 1980
Sep165.1 mm (6.5 in)30 September 1986
Oct147.3 mm (5.8 in)9 October 2009
Nov139.7 mm (5.5 in)25 November 1987
Dec135.6 mm (5.3 in)27 December 2015

Period of Record Coverage

1993 to 2026
Days with data per year at Diamond 2W 34 years of record at Diamond 2W, 1993 to 2026. 5 years have data for under 90 percent of days and are left out of rankings: 1999, 2004, 2005, 2007, 2026. 1993: 330 of 365 days1994: 360 of 365 days1995: 352 of 365 days1996: 356 of 366 days1997: 348 of 365 days1998: 339 of 365 days1999: 312 of 365 days2000: 338 of 366 days2001: 346 of 365 days2002: 356 of 365 days2003: 351 of 365 days2004: 303 of 366 days2005: 284 of 365 days2006: 338 of 365 days2007: 312 of 365 days2008: 363 of 366 days2009: 349 of 365 days2010: 357 of 365 days2011: 342 of 365 days2012: 365 of 366 days2013: 365 of 365 days2014: 364 of 365 days2015: 362 of 365 days2016: 366 of 366 days2017: 364 of 365 days2018: 365 of 365 days2019: 362 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 365 of 365 days2026: 267 of 365 days1995200020052010201520202025
34 years of record at Diamond 2W, 1993 to 2026. 5 years have data for under 90 percent of days and are left out of rankings: 1999, 2004, 2005, 2007, 2026.
Days with data per year at Diamond 2W
YearDays with dataShare of yearComplete
199333090%Yes
199436099%Yes
199535296%Yes
199635697%Yes
199734895%Yes
199833993%Yes
199931285%No
200033892%Yes
200134695%Yes
200235698%Yes
200335196%Yes
200430383%No
200528478%No
200633893%Yes
200731285%No
200836399%Yes
200934996%Yes
201035798%Yes
201134294%Yes
2012365100%Yes
2013365100%Yes
2014364100%Yes
201536299%Yes
2016366100%Yes
2017364100%Yes
2018365100%Yes
201936299%Yes
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
2025365100%Yes
202626773%No

Latest Records

20
Latest records at Diamond 2W
DateStationRecordValueBeat old record byOld record stoodSignificance
14 October 2026Diamond 2W, USdaily rain (Provisional)51.3 mm (2.0 in)15.7 mm (0.6 in)52 years27 of 100 (Routine)
14 October 2026Diamond 2W, USdaily high min (Provisional)18.9 C (66.0 F)1.1 C (2.0 F)25 years11 of 100 (Routine)
14 October 2026Diamond 2W, USmonthly high max (Tie, Provisional)34.4 C (93.9 F)tie2 years3 of 100 (Routine)
13 October 2026Diamond 2W, USdaily high min (Provisional)21.7 C (71.1 F)4.5 C (8.1 F)25 years17 of 100 (Routine)
12 October 2026Diamond 2W, USdaily high max (Tie, Provisional)32.8 C (91.0 F)tie5 years1 of 100 (Routine)
9 October 2026Diamond 2W, USdaily high max (Provisional)32.8 C (91.0 F)1.1 C (2.0 F)4 years5 of 100 (Routine)
8 October 2026Diamond 2W, USdaily high max (Tie, Provisional)31.7 C (89.1 F)tie5 years1 of 100 (Routine)
17 September 2026Diamond 2W, USdaily high max (Provisional)38.9 C (102.0 F)4.5 C (8.1 F)7 years14 of 100 (Routine)
16 September 2026Diamond 2W, USdaily high max (Provisional)38.3 C (100.9 F)3.9 C (7.0 F)0 years11 of 100 (Routine)
16 September 2026Diamond 2W, USdaily high min (Provisional)22.2 C (72.0 F)1.1 C (2.0 F)21 years11 of 100 (Routine)
15 September 2026Diamond 2W, USdaily high min (Provisional)22.8 C (73.0 F)1.1 C (2.0 F)21 years11 of 100 (Routine)
15 September 2026Diamond 2W, USdaily high max (Provisional)37.8 C (100.0 F)2.8 C (5.0 F)0 years8 of 100 (Routine)
10 September 2026Diamond 2W, USmonthly high max (Tie, Provisional)40.0 C (104.0 F)tie26 years5 of 100 (Routine)
10 September 2026Diamond 2W, USdaily high min (Tie, Provisional)22.2 C (72.0 F)tie12 years1 of 100 (Routine)
9 September 2026Diamond 2W, USdaily high min (Provisional)23.3 C (73.9 F)2.2 C (4.0 F)9 years9 of 100 (Routine)
9 September 2026Diamond 2W, USmonthly high max (Tie, Provisional)40.0 C (104.0 F)tie26 years5 of 100 (Routine)
8 September 2026Diamond 2W, USdaily high max (Provisional)39.4 C (102.9 F)2.7 C (4.9 F)28 years16 of 100 (Routine)
8 September 2026Diamond 2W, USdaily high min (Provisional)22.8 C (73.0 F)0.6 C (1.1 F)11 years7 of 100 (Routine)
7 September 2026Diamond 2W, USdaily high max (Provisional)38.9 C (102.0 F)2.2 C (4.0 F)13 years11 of 100 (Routine)
6 September 2026Diamond 2W, USmonthly high max (Tie, Provisional)40.0 C (104.0 F)tie26 years5 of 100 (Routine)

Climate Trend

28 complete years, 1994 to 2025
Annual mean temperature at Diamond 2W as warming stripes, 1994 to 2025 One stripe for each of 28 complete years at Diamond 2W, 1994 to 2025. Blue stripes are years cooler than the station's own mean of 13.9 C (57.1 F); red stripes are warmer. The coolest year was 1997, at 12.5 C (54.5 F), and the warmest was 2012, at 16.2 C (61.2 F). The strongest colour marks a difference of 2.3 C (4.1 F). 1994: 13.4 C, -0.5 C from the station mean1995: 13.4 C, -0.6 C from the station mean1996: 12.9 C, -1.1 C from the station mean1997: 12.5 C, -1.5 C from the station mean1998: 14.3 C, +0.3 C from the station mean2001: 14.6 C, +0.7 C from the station mean2002: 14.4 C, +0.4 C from the station mean2003: 13.7 C, -0.2 C from the station mean2004: 13.9 C, 0.0 C from the station mean2006: 14.4 C, +0.5 C from the station mean2008: 12.8 C, -1.2 C from the station mean2009: 13.2 C, -0.8 C from the station mean2010: 14.2 C, +0.3 C from the station mean2011: 14.6 C, +0.7 C from the station mean2012: 16.2 C, +2.3 C from the station mean2013: 13.0 C, -0.9 C from the station mean2014: 12.8 C, -1.1 C from the station mean2015: 14.1 C, +0.1 C from the station mean2016: 14.9 C, +0.9 C from the station mean2017: 14.7 C, +0.7 C from the station mean2018: 13.6 C, -0.3 C from the station mean2019: 13.5 C, -0.5 C from the station mean2020: 13.8 C, -0.1 C from the station mean2021: 14.0 C, 0.0 C from the station mean2022: 13.7 C, -0.3 C from the station mean2023: 14.5 C, +0.6 C from the station mean2024: 15.0 C, +1.1 C from the station mean2025: 14.4 C, +0.4 C from the station mean1994200020052010201520202025
One stripe for each of 28 complete years at Diamond 2W, 1994 to 2025. Blue stripes are years cooler than the station's own mean of 13.9 C (57.1 F); red stripes are warmer. The coolest year was 1997, at 12.5 C (54.5 F), and the warmest was 2012, at 16.2 C (61.2 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Diamond 2W as warming stripes, 1994 to 2025
YearAnnual mean temperatureDifference from the station mean
199413.4 C-0.53 C
199513.4 C-0.55 C
199612.9 C-1.05 C
199712.5 C-1.45 C
199814.3 C+0.35 C
200114.6 C+0.66 C
200214.4 C+0.44 C
200313.7 C-0.21 C
200413.9 C0.00 C
200614.4 C+0.48 C
200812.8 C-1.18 C
200913.2 C-0.79 C
201014.2 C+0.26 C
201114.6 C+0.69 C
201216.2 C+2.29 C
201313.0 C-0.93 C
201412.8 C-1.14 C
201514.1 C+0.12 C
201614.9 C+0.94 C
201714.7 C+0.72 C
201813.6 C-0.32 C
201913.5 C-0.49 C
202013.8 C-0.13 C
202114.0 C+0.03 C
202213.7 C-0.27 C
202314.5 C+0.60 C
202415.0 C+1.10 C
202514.4 C+0.44 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

1973 to 2026
Yearly extremes at Diamond 2W: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.3 C (109.9 F)201136.7 C (98.1 F)34
Coldest night (TNn)-26.7 C (-16.1 F)1996-16.7 C (1.9 F)34
Wettest day (Rx1day)165.1 mm (6.5 in)198679.4 mm (3.1 in)54
Wettest five days (Rx5day)252.7 mm (9.9 in)1986125.5 mm (4.9 in)54
Longest dry spell (CDD)45 days197923 days54

Hottest day (TXx)

Hottest day (TXx) at Diamond 2W by year The hottest day of the year at Diamond 2W, 1973 to 2026. The record is 43.3 C (109.9 F) in 2011, marked on the chart; the median year is 36.7 C (98.1 F). 3537.54042.54519801990200020102020Record: 43.3 C (109.9 F) in 2011
The hottest day of the year at Diamond 2W, 1973 to 2026. The record is 43.3 C (109.9 F) in 2011, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Diamond 2W by year
YearHottest day (TXx)
1973n/a
1974n/a
1975n/a
1976n/a
1977n/a
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
199336.1 C (97.0 F)
199435.6 C (96.1 F)
199537.8 C (100.0 F)
199636.7 C (98.1 F)
199735.0 C (95.0 F)
199838.3 C (100.9 F)
199938.3 C (100.9 F)
200040.0 C (104.0 F)
200136.1 C (97.0 F)
200235.0 C (95.0 F)
200337.2 C (99.0 F)
200435.0 C (95.0 F)
200536.7 C (98.1 F)
200638.3 C (100.9 F)
200737.8 C (100.0 F)
200836.7 C (98.1 F)
200936.7 C (98.1 F)
201038.3 C (100.9 F)
201143.3 C (109.9 F)
201242.8 C (109.0 F)
201336.1 C (97.0 F)
201437.8 C (100.0 F)
201536.7 C (98.1 F)
201636.7 C (98.1 F)
201736.1 C (97.0 F)
201837.2 C (99.0 F)
201935.6 C (96.1 F)
202035.6 C (96.1 F)
202136.1 C (97.0 F)
202240.6 C (105.1 F)
202338.3 C (100.9 F)
202436.7 C (98.1 F)
202538.3 C (100.9 F)
202640.0 C (104.0 F)

Coldest night (TNn)

Coldest night (TNn) at Diamond 2W by year The coldest night of the year at Diamond 2W, 1973 to 2026. The record is -26.7 C (-16.1 F) in 1996, marked on the chart; the median year is -16.7 C (1.9 F). -30-25-20-15-1019801990200020102020Record: -26.7 C (-16.1 F) in 1996
The coldest night of the year at Diamond 2W, 1973 to 2026. The record is -26.7 C (-16.1 F) in 1996, marked on the chart; the median year is -16.7 C (1.9 F).
Coldest night (TNn) at Diamond 2W by year
YearColdest night (TNn)
1973n/a
1974n/a
1975n/a
1976n/a
1977n/a
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
1993-22.2 C (-8.0 F)
1994-16.1 C (3.0 F)
1995-20.0 C (-4.0 F)
1996-26.7 C (-16.1 F)
1997-24.4 C (-11.9 F)
1998-13.3 C (8.1 F)
1999-12.8 C (9.0 F)
2000-17.8 C (0.0 F)
2001-16.1 C (3.0 F)
2002-13.9 C (7.0 F)
2003-17.2 C (1.0 F)
2004-16.1 C (3.0 F)
2005-17.2 C (1.0 F)
2006-16.7 C (1.9 F)
2007-15.0 C (5.0 F)
2008-16.1 C (3.0 F)
2009-15.0 C (5.0 F)
2010-21.7 C (-7.1 F)
2011-25.0 C (-13.0 F)
2012-12.8 C (9.0 F)
2013-16.7 C (1.9 F)
2014-21.1 C (-6.0 F)
2015-15.0 C (5.0 F)
2016-16.7 C (1.9 F)
2017-15.0 C (5.0 F)
2018-22.2 C (-8.0 F)
2019-13.9 C (7.0 F)
2020-11.1 C (12.0 F)
2021-25.0 C (-13.0 F)
2022-18.9 C (-2.0 F)
2023-10.0 C (14.0 F)
2024-18.3 C (-0.9 F)
2025-20.6 C (-5.1 F)
2026-26.7 C (-16.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Diamond 2W by year The wettest day of the year at Diamond 2W, 1973 to 2026. The record is 165.1 mm (6.5 in) in 1986, marked on the chart; the median year is 79.4 mm (3.1 in). 05010015020019801990200020102020Record: 165.1 mm (6.5 in) in 1986
The wettest day of the year at Diamond 2W, 1973 to 2026. The record is 165.1 mm (6.5 in) in 1986, marked on the chart; the median year is 79.4 mm (3.1 in).
Wettest day (Rx1day) at Diamond 2W by year
YearWettest day (Rx1day)
197368.1 mm (2.7 in)
197480.0 mm (3.1 in)
197597.3 mm (3.8 in)
1976119.4 mm (4.7 in)
197755.9 mm (2.2 in)
197849.3 mm (1.9 in)
1979104.6 mm (4.1 in)
1980127.0 mm (5.0 in)
198158.4 mm (2.3 in)
198265.3 mm (2.6 in)
1983101.6 mm (4.0 in)
198455.9 mm (2.2 in)
1985101.6 mm (4.0 in)
1986165.1 mm (6.5 in)
1987139.7 mm (5.5 in)
198811.2 mm (0.4 in)
198925.9 mm (1.0 in)
199055.9 mm (2.2 in)
199141.9 mm (1.6 in)
199289.7 mm (3.5 in)
1993116.8 mm (4.6 in)
199478.7 mm (3.1 in)
199562.0 mm (2.4 in)
1996154.9 mm (6.1 in)
199764.0 mm (2.5 in)
1998121.4 mm (4.8 in)
199986.9 mm (3.4 in)
200092.2 mm (3.6 in)
2001104.9 mm (4.1 in)
200261.2 mm (2.4 in)
200389.9 mm (3.5 in)
200453.3 mm (2.1 in)
200551.1 mm (2.0 in)
200650.8 mm (2.0 in)
200777.5 mm (3.1 in)
2008101.6 mm (4.0 in)
2009147.3 mm (5.8 in)
201082.6 mm (3.3 in)
201168.6 mm (2.7 in)
201292.5 mm (3.6 in)
201369.9 mm (2.8 in)
2014134.6 mm (5.3 in)
2015135.6 mm (5.3 in)
201691.2 mm (3.6 in)
201763.5 mm (2.5 in)
201850.8 mm (2.0 in)
2019153.7 mm (6.1 in)
202061.5 mm (2.4 in)
2021124.5 mm (4.9 in)
202288.9 mm (3.5 in)
202340.6 mm (1.6 in)
202447.5 mm (1.9 in)
202560.2 mm (2.4 in)
202668.3 mm (2.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Diamond 2W by year The wettest five days of the year at Diamond 2W, 1973 to 2026. The record is 252.7 mm (9.9 in) in 1986, marked on the chart; the median year is 125.5 mm (4.9 in). 010020030019801990200020102020Record: 252.7 mm (9.9 in) in 1986
The wettest five days of the year at Diamond 2W, 1973 to 2026. The record is 252.7 mm (9.9 in) in 1986, marked on the chart; the median year is 125.5 mm (4.9 in).
Wettest five days (Rx5day) at Diamond 2W by year
YearWettest five days (Rx5day)
1973141.7 mm (5.6 in)
1974186.7 mm (7.4 in)
1975119.9 mm (4.7 in)
1976180.4 mm (7.1 in)
1977165.9 mm (6.5 in)
1978103.4 mm (4.1 in)
1979107.1 mm (4.2 in)
1980158.5 mm (6.2 in)
198193.5 mm (3.7 in)
198291.4 mm (3.6 in)
1983153.0 mm (6.0 in)
198471.2 mm (2.8 in)
1985124.5 mm (4.9 in)
1986252.7 mm (9.9 in)
1987193.0 mm (7.6 in)
198816.8 mm (0.7 in)
198925.9 mm (1.0 in)
1990115.6 mm (4.6 in)
199179.3 mm (3.1 in)
1992161.9 mm (6.4 in)
1993123.6 mm (4.9 in)
1994163.0 mm (6.4 in)
1995102.9 mm (4.1 in)
1996211.3 mm (8.3 in)
1997129.1 mm (5.1 in)
1998144.3 mm (5.7 in)
1999143.3 mm (5.6 in)
2000127.5 mm (5.0 in)
2001173.0 mm (6.8 in)
2002136.9 mm (5.4 in)
2003135.9 mm (5.4 in)
200497.8 mm (3.9 in)
2005106.6 mm (4.2 in)
200696.4 mm (3.8 in)
2007101.1 mm (4.0 in)
2008159.3 mm (6.3 in)
2009186.7 mm (7.4 in)
2010118.9 mm (4.7 in)
2011171.7 mm (6.8 in)
2012142.0 mm (5.6 in)
2013124.2 mm (4.9 in)
2014169.0 mm (6.7 in)
2015244.3 mm (9.6 in)
2016107.2 mm (4.2 in)
201786.4 mm (3.4 in)
2018122.7 mm (4.8 in)
2019200.2 mm (7.9 in)
2020141.1 mm (5.6 in)
2021126.5 mm (5.0 in)
2022109.8 mm (4.3 in)
202352.6 mm (2.1 in)
202469.9 mm (2.8 in)
202592.2 mm (3.6 in)
202698.8 mm (3.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Diamond 2W by year The longest dry spell of the year at Diamond 2W, 1973 to 2026. The record is 45 days in 1979, marked on the chart; the median year is 23 days. 102030405019801990200020102020Record: 45 days in 1979
The longest dry spell of the year at Diamond 2W, 1973 to 2026. The record is 45 days in 1979, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Diamond 2W by year
YearLongest dry spell (CDD)
197319 days
197424 days
197515 days
197619 days
197726 days
197817 days
197945 days
198037 days
198120 days
198218 days
198329 days
198421 days
198532 days
198623 days
198719 days
198812 days
198929 days
199016 days
199120 days
199219 days
199320 days
199423 days
199530 days
199624 days
199715 days
199823 days
199942 days
200044 days
200124 days
200233 days
200323 days
200424 days
200522 days
200632 days
200720 days
200820 days
200927 days
201023 days
201117 days
201224 days
201319 days
201420 days
201527 days
201621 days
201724 days
201813 days
201915 days
202025 days
202113 days
202238 days
202322 days
202436 days
202529 days
202623 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 Diamond 2W falls on 17 April and the median first autumn frost on 23 October, which leaves a median of 186 days between them.

Fitted over all years, the growing season changes by +2.6 days per decade at this station.

Frost dates and growing season at Diamond 2W
MeasureMedian, all yearsEarliest periodRecent period (1994 to 2025)Recent against earliestFitted trend
Last spring frost17 Apriln/a17 Apriln/a-0.1 days per decade
First autumn frost23 Octobern/a23 Octobern/a+2.5 days per decade
Growing days186 daysn/a186 daysn/a+2.6 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

44 years, 1974 to 2025

A day with at least 83.1 mm (3.3 in) of rain is expected about once in 2 years. A day with at least 190.0 mm (7.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Diamond 2W: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years83.1 mm (3.3 in)
5 years113.7 mm (4.5 in)
10 years133.2 mm (5.2 in)
25 years156.8 mm (6.2 in)
50 years173.7 mm (6.8 in)Longer than the 44 years of record
100 years190.0 mm (7.5 in)Longer than the 44 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, 44 years of values from 1974 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: 165.1 mm (6.5 in) in 1986; 154.9 mm (6.1 in) in 1996; 147.3 mm (5.8 in) in 2009.

Download the Data

  • Data for Diamond 2W standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Diamond 2W 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).