Daily records
Page built 2026-10-17
Data as of 2026-10-15
Search
Built 2026-10-17 (17 October 2026)

Diamond Lake Weather Records (USS0022F18S)

Record envelope, standing records and threshold days for Diamond Lake (USS0022F18S), Oregon, United States, with 47 years of record.

Key Facts for Diamond Lake

  • Diamond Lake (USS0022F18S) is a weather station in Oregon, United States at 43.19 latitude and -122.14 longitude, 1,609 m (5,280 ft) above sea level.
  • The station reports from 1980 to 2026, 47 years of record.
  • 1,464 records set at Diamond Lake still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Diamond Lake set a daily record high minimum temperature of 9.3 C (48.7 F) on 7 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Oregon, United States, 43.19 latitude, -122.14 longitude.
  • Elevation: 1,609 m (5,280 ft).
  • Period of record: 1980 to 2026, 47 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

12 days at or beyond a record
Daily record high and record low at Diamond Lake, with 2026 drawn through them The band shows the record high and record low for each calendar day at Diamond Lake. The lines show the 2026 daily maximum and minimum. 12 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 Diamond Lake. The lines show the 2026 daily maximum and minimum. 12 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Diamond Lake, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan21.1 C (70.0 F)-22.4 C (-8.3 F)20.2 C (68.4 F)-7.3 C (18.9 F)
Feb20.4 C (68.7 F)-25.5 C (-13.9 F)16.9 C (62.4 F)-8.5 C (16.7 F)
Mar21.8 C (71.2 F)-19.6 C (-3.3 F)19.5 C (67.1 F)-7.5 C (18.5 F)
Apr25.1 C (77.2 F)-15.2 C (4.6 F)18.5 C (65.3 F)-7.7 C (18.1 F)
May28.4 C (83.1 F)-8.7 C (16.3 F)23.4 C (74.1 F)-1.7 C (28.9 F)
Jun35.1 C (95.2 F)-5.6 C (21.9 F)27.8 C (82.0 F)-2.2 C (28.0 F)
Jul35.7 C (96.3 F)-2.8 C (27.0 F)28.3 C (82.9 F)0.4 C (32.7 F)
Aug34.5 C (94.1 F)-3.0 C (26.6 F)29.8 C (85.6 F)0.2 C (32.4 F)
Sep34.7 C (94.5 F)-6.6 C (20.1 F)25.1 C (77.2 F)1.8 C (35.2 F)
Oct29.7 C (85.5 F)-12.6 C (9.3 F)25.7 C (78.3 F)-4.5 C (23.9 F)
Nov21.3 C (70.3 F)-19.7 C (-3.5 F)n/an/a
Dec18.8 C (65.8 F)-32.2 C (-26.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Diamond Lake by the year they were set 1,464 records at Diamond Lake still stand. 1996 holds the most, with 68. 0204060801987: 71988: 231989: 451990: 521991: 411992: 481993: 561994: 471995: 341996: 681997: 251998: 311999: 622000: 362001: 382002: 552003: 472004: 142005: 212006: 362007: 272008: 532009: 412010: 312011: 212012: 292013: 282014: 272015: 362016: 362017: 352018: 202019: 252020: 242021: 302022: 552023: 362024: 402025: 462026: 381987199119951999200320072011201520192023
1,464 records at Diamond Lake still stand. 1996 holds the most, with 68.
Standing records at Diamond Lake by the year they were set
Year setStanding records
19877
198823
198945
199052
199141
199248
199356
199447
199534
199668
199725
199831
199962
200036
200138
200255
200347
200414
200521
200636
200727
200853
200941
201031
201121
201229
201328
201427
201536
201636
201735
201820
201925
202024
202130
202255
202336
202440
202546
202638

All-Time Record Progression

2 new records
When Diamond Lake set new all-time records 2 all-time records were set at Diamond Lake between 28 June 2021 and 1 August 2022. Each dot is a new record. Record high minimum temperature28 June 2021: Record high minimum temperature 16.3 C (61.3 F)1 August 2022: Record high minimum temperature 16.4 C (61.5 F)
2 all-time records were set at Diamond Lake between 28 June 2021 and 1 August 2022. Each dot is a new record.
When Diamond Lake set new all-time records
DateKindDetail
2021-06-28Record high minimum temperatureRecord high minimum temperature 16.3 C (61.3 F)
2022-08-01Record high minimum temperatureRecord high minimum temperature 16.4 C (61.5 F)

Wettest Day of Each Month

Nov: 190.5 mm (7.5 in)
Record daily precipitation for each month at Diamond Lake The wettest day on record for each calendar month at Diamond Lake. The most was 190.5 mm (7.5 in) on 18 November 1996. 050100150200 Jan: 71.1 mm (2.8 in), 7 January 1990 Jan Feb: 104.1 mm (4.1 in), 12 February 2014 Feb Mar: 68.6 mm (2.7 in), 16 March 2025 Mar Apr: 76.2 mm (3.0 in), 7 April 2019 Apr May: 35.6 mm (1.4 in), 25 May 1990 May Jun: 43.2 mm (1.7 in), 7 June 1981 Jun Jul: 45.7 mm (1.8 in), 17 July 1987 Jul Aug: 27.9 mm (1.1 in), 18 August 1985 Aug Sep: 94.0 mm (3.7 in), 29 September 2013 Sep Oct: 58.4 mm (2.3 in), 22 October 1985 Oct Nov: 190.5 mm (7.5 in), 18 November 1996 Nov Dec: 91.4 mm (3.6 in), 5 December 1981 Dec
The wettest day on record for each calendar month at Diamond Lake. The most was 190.5 mm (7.5 in) on 18 November 1996.
Record daily precipitation for each month at Diamond Lake
MonthRecord daily precipitation (mm)Date
Jan71.1 mm (2.8 in)7 January 1990
Feb104.1 mm (4.1 in)12 February 2014
Mar68.6 mm (2.7 in)16 March 2025
Apr76.2 mm (3.0 in)7 April 2019
May35.6 mm (1.4 in)25 May 1990
Jun43.2 mm (1.7 in)7 June 1981
Jul45.7 mm (1.8 in)17 July 1987
Aug27.9 mm (1.1 in)18 August 1985
Sep94.0 mm (3.7 in)29 September 2013
Oct58.4 mm (2.3 in)22 October 1985
Nov190.5 mm (7.5 in)18 November 1996
Dec91.4 mm (3.6 in)5 December 1981

Period of Record Coverage

1987 to 2026
Days with data per year at Diamond Lake 40 years of record at Diamond Lake, 1987 to 2026. 4 years have data for under 90 percent of days and are left out of rankings: 1987, 1988, 2020, 2026. 1987: 91 of 365 days1988: 207 of 366 days1989: 365 of 365 days1990: 365 of 365 days1991: 364 of 365 days1992: 364 of 366 days1993: 347 of 365 days1994: 349 of 365 days1995: 365 of 365 days1996: 365 of 366 days1997: 364 of 365 days1998: 365 of 365 days1999: 364 of 365 days2000: 365 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 364 of 365 days2004: 365 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 363 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: 323 of 366 days2021: 365 of 365 days2022: 365 of 365 days2023: 364 of 365 days2024: 366 of 366 days2025: 365 of 365 days2026: 285 of 365 days19901995200020052010201520202025
40 years of record at Diamond Lake, 1987 to 2026. 4 years have data for under 90 percent of days and are left out of rankings: 1987, 1988, 2020, 2026.
Days with data per year at Diamond Lake
YearDays with dataShare of yearComplete
19879125%No
198820757%No
1989365100%Yes
1990365100%Yes
1991364100%Yes
199236499%Yes
199334795%Yes
199434996%Yes
1995365100%Yes
1996365100%Yes
1997364100%Yes
1998365100%Yes
1999364100%Yes
2000365100%Yes
2001365100%Yes
2002365100%Yes
2003364100%Yes
2004365100%Yes
2005365100%Yes
2006365100%Yes
2007365100%Yes
2008366100%Yes
200936399%Yes
2010365100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
2016366100%Yes
2017365100%Yes
2018365100%Yes
2019365100%Yes
202032388%No
2021365100%Yes
2022365100%Yes
2023364100%Yes
2024366100%Yes
2025365100%Yes
202628578%No

Latest Records

20
Latest records at Diamond Lake
DateStationRecordValueBeat old record byOld record stoodSignificance
7 October 2026Diamond Lake, USdaily high min (Provisional)9.3 C (48.7 F)0.7 C (1.3 F)4 years7 of 100 (Routine)
1 October 2026Diamond Lake, USdaily high min (Provisional)7.4 C (45.3 F)0.1 C (0.2 F)1 year4 of 100 (Routine)
6 September 2026Diamond Lake, USdaily low max (Provisional)9.2 C (48.6 F)2.0 C (3.6 F)16 years12 of 100 (Routine)
5 September 2026Diamond Lake, USdaily rain (Provisional)12.7 mm (0.5 in)10.2 mm (0.4 in)24 years20 of 100 (Routine)
4 September 2026Diamond Lake, USdaily rain (Tie, Provisional)2.5 mm (0.10 in)tie44 years4 of 100 (Routine)
3 September 2026Diamond Lake, USdaily low max (Provisional)8.9 C (48.0 F)1.2 C (2.2 F)25 years13 of 100 (Routine)
2 September 2026Diamond Lake, USdaily rain (Provisional)35.6 mm (1.4 in)25.4 mm (1.0 in)40 years44 of 100 (Notable)
6 August 2026Diamond Lake, USdaily high min12.0 C (53.6 F)0.6 C (1.1 F)8 years7 of 100 (Routine)
5 August 2026Diamond Lake, USdaily high min12.2 C (54.0 F)0.6 C (1.1 F)20 years11 of 100 (Routine)
21 July 2026Diamond Lake, USdaily high min13.7 C (56.7 F)1.0 C (1.8 F)20 years13 of 100 (Routine)
20 July 2026Diamond Lake, USmonthly high min15.4 C (59.7 F)0.5 C (0.9 F)2 years15 of 100 (Routine)
6 July 2026Diamond Lake, USdaily high min12.6 C (54.7 F)1.3 C (2.3 F)11 years11 of 100 (Routine)
1 July 2026Diamond Lake, USdaily low min0.4 C (32.7 F)0.1 C (0.2 F)15 years8 of 100 (Routine)
27 June 2026Diamond Lake, USdaily low max7.9 C (46.2 F)3.5 C (6.3 F)29 years17 of 100 (Routine)
18 June 2026Diamond Lake, USdaily high min8.8 C (47.8 F)1.6 C (2.9 F)23 years14 of 100 (Routine)
16 June 2026Diamond Lake, USdaily high min8.8 C (47.8 F)0.7 C (1.3 F)8 years8 of 100 (Routine)
15 June 2026Diamond Lake, USdaily high max27.8 C (82.0 F)1.8 C (3.2 F)24 years14 of 100 (Routine)
15 June 2026Diamond Lake, USdaily high min10.4 C (50.7 F)2.7 C (4.9 F)8 years14 of 100 (Routine)
14 June 2026Diamond Lake, USdaily high min9.3 C (48.7 F)1.3 C (2.3 F)36 years18 of 100 (Routine)
14 June 2026Diamond Lake, USdaily high max26.8 C (80.2 F)0.9 C (1.6 F)25 years12 of 100 (Routine)

Climate Trend

36 complete years, 1989 to 2025
Annual mean temperature at Diamond Lake as warming stripes, 1989 to 2025 One stripe for each of 36 complete years at Diamond Lake, 1989 to 2025. Blue stripes are years cooler than the station's own mean of 6.4 C (43.6 F); red stripes are warmer. The coolest year was 1993, at 5.1 C (41.1 F), and the warmest was 2015, at 8.0 C (46.3 F). The strongest colour marks a difference of 1.6 C (2.9 F). 1989: 5.4 C, -1.0 C from the station mean1990: 5.4 C, -1.0 C from the station mean1991: 6.0 C, -0.4 C from the station mean1992: 6.9 C, +0.5 C from the station mean1993: 5.1 C, -1.3 C from the station mean1994: 5.6 C, -0.8 C from the station mean1995: 6.1 C, -0.3 C from the station mean1996: 5.9 C, -0.5 C from the station mean1997: 5.7 C, -0.7 C from the station mean1998: 5.7 C, -0.8 C from the station mean1999: 5.5 C, -0.9 C from the station mean2000: 5.7 C, -0.7 C from the station mean2001: 6.0 C, -0.4 C from the station mean2002: 6.2 C, -0.2 C from the station mean2003: 6.7 C, +0.2 C from the station mean2004: 6.8 C, +0.3 C from the station mean2005: 7.1 C, +0.7 C from the station mean2006: 6.8 C, +0.4 C from the station mean2007: 6.6 C, +0.2 C from the station mean2008: 6.3 C, -0.1 C from the station mean2009: 6.4 C, 0.0 C from the station mean2010: 6.0 C, -0.4 C from the station mean2011: 5.7 C, -0.8 C from the station mean2012: 6.4 C, -0.1 C from the station mean2013: 6.7 C, +0.2 C from the station mean2014: 7.6 C, +1.2 C from the station mean2015: 8.0 C, +1.5 C from the station mean2016: 6.7 C, +0.3 C from the station mean2017: 6.9 C, +0.5 C from the station mean2018: 6.9 C, +0.5 C from the station mean2019: 6.3 C, -0.1 C from the station mean2021: 7.1 C, +0.7 C from the station mean2022: 7.3 C, +0.8 C from the station mean2023: 6.7 C, +0.3 C from the station mean2024: 7.4 C, +1.0 C from the station mean2025: 7.9 C, +1.5 C from the station mean19891995200020052010201520202025
One stripe for each of 36 complete years at Diamond Lake, 1989 to 2025. Blue stripes are years cooler than the station's own mean of 6.4 C (43.6 F); red stripes are warmer. The coolest year was 1993, at 5.1 C (41.1 F), and the warmest was 2015, at 8.0 C (46.3 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Diamond Lake as warming stripes, 1989 to 2025
YearAnnual mean temperatureDifference from the station mean
19895.4 C-1.00 C
19905.4 C-1.03 C
19916.0 C-0.42 C
19926.9 C+0.46 C
19935.1 C-1.34 C
19945.6 C-0.83 C
19956.1 C-0.33 C
19965.9 C-0.53 C
19975.7 C-0.70 C
19985.7 C-0.75 C
19995.5 C-0.93 C
20005.7 C-0.68 C
20016.0 C-0.44 C
20026.2 C-0.22 C
20036.7 C+0.23 C
20046.8 C+0.33 C
20057.1 C+0.66 C
20066.8 C+0.42 C
20076.6 C+0.18 C
20086.3 C-0.12 C
20096.4 C-0.03 C
20106.0 C-0.43 C
20115.7 C-0.76 C
20126.4 C-0.07 C
20136.7 C+0.24 C
20147.6 C+1.22 C
20158.0 C+1.55 C
20166.7 C+0.31 C
20176.9 C+0.46 C
20186.9 C+0.48 C
20196.3 C-0.08 C
20217.1 C+0.72 C
20227.3 C+0.83 C
20236.7 C+0.30 C
20247.4 C+0.96 C
20257.9 C+1.52 C

The annual mean temperature here has risen by 0.5 C (0.3 to 0.7) per decade over 1989 to 2025. In Fahrenheit: 0.9 F (0.6 to 1.2) per decade. The slope is a straight line fitted to 36 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Diamond Lake
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.5 C (0.3 to 0.7) per decade0.9 F (0.6 to 1.2) per decade1989 to 202536Rise
Mean daily maximum0.1 C (-0.1 to 0.3) per decade0.3 F (-0.1 to 0.6) per decade1989 to 202536Not clearly different from zero
Mean daily minimum0.9 C (0.7 to 1.0) per decade1.5 F (1.2 to 1.9) per decade1989 to 202536Rise

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 Diamond Lake: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)35.7 C (96.3 F)200231.4 C (88.5 F)40
Coldest night (TNn)-32.2 C (-26.0 F)1990-18.3 C (-0.9 F)40
Wettest day (Rx1day)190.5 mm (7.5 in)199653.3 mm (2.1 in)47
Wettest five days (Rx5day)264.2 mm (10.4 in)1996132.0 mm (5.2 in)47
Longest dry spell (CDD)105 days201842 days47

Hottest day (TXx)

Hottest day (TXx) at Diamond Lake by year The hottest day of the year at Diamond Lake, 1980 to 2026. The record is 35.7 C (96.3 F) in 2002, marked on the chart; the median year is 31.4 C (88.5 F). 2527.53032.53537.519801990200020102020Record: 35.7 C (96.3 F) in 2002
The hottest day of the year at Diamond Lake, 1980 to 2026. The record is 35.7 C (96.3 F) in 2002, marked on the chart; the median year is 31.4 C (88.5 F).
Hottest day (TXx) at Diamond Lake by year
YearHottest day (TXx)
1980n/a
1981n/a
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a
198728.4 C (83.1 F)
198827.3 C (81.1 F)
198928.5 C (83.3 F)
199032.7 C (90.9 F)
199131.6 C (88.9 F)
199234.5 C (94.1 F)
199331.6 C (88.9 F)
199432.5 C (90.5 F)
199530.5 C (86.9 F)
199633.7 C (92.7 F)
199730.3 C (86.5 F)
199834.7 C (94.5 F)
199931.0 C (87.8 F)
200030.1 C (86.2 F)
200133.1 C (91.6 F)
200235.7 C (96.3 F)
200335.0 C (95.0 F)
200430.1 C (86.2 F)
200530.0 C (86.0 F)
200632.6 C (90.7 F)
200731.0 C (87.8 F)
200832.7 C (90.9 F)
200931.4 C (88.5 F)
201029.2 C (84.6 F)
201128.3 C (82.9 F)
201230.3 C (86.5 F)
201330.4 C (86.7 F)
201429.9 C (85.8 F)
201532.2 C (90.0 F)
201632.1 C (89.8 F)
201733.7 C (92.7 F)
201830.8 C (87.4 F)
201930.1 C (86.2 F)
202032.3 C (90.1 F)
202135.1 C (95.2 F)
202233.9 C (93.0 F)
202331.4 C (88.5 F)
202433.3 C (91.9 F)
202530.9 C (87.6 F)
202629.8 C (85.6 F)

Coldest night (TNn)

Coldest night (TNn) at Diamond Lake by year The coldest night of the year at Diamond Lake, 1980 to 2026. The record is -32.2 C (-26.0 F) in 1990, marked on the chart; the median year is -18.3 C (-0.9 F). -40-30-20-10019801990200020102020Record: -32.2 C (-26.0 F) in 1990
The coldest night of the year at Diamond Lake, 1980 to 2026. The record is -32.2 C (-26.0 F) in 1990, marked on the chart; the median year is -18.3 C (-0.9 F).
Coldest night (TNn) at Diamond Lake by year
YearColdest night (TNn)
1980n/a
1981n/a
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a
1987-20.3 C (-4.5 F)
1988-18.7 C (-1.7 F)
1989-25.5 C (-13.9 F)
1990-32.2 C (-26.0 F)
1991-14.4 C (6.1 F)
1992-13.7 C (7.3 F)
1993-23.7 C (-10.7 F)
1994-19.3 C (-2.7 F)
1995-17.4 C (0.7 F)
1996-21.4 C (-6.5 F)
1997-17.9 C (-0.2 F)
1998-23.6 C (-10.5 F)
1999-19.6 C (-3.3 F)
2000-13.5 C (7.7 F)
2001-17.1 C (1.2 F)
2002-21.7 C (-7.1 F)
2003-17.0 C (1.4 F)
2004-12.2 C (10.0 F)
2005-13.8 C (7.2 F)
2006-18.8 C (-1.8 F)
2007-22.4 C (-8.3 F)
2008-18.8 C (-1.8 F)
2009-19.6 C (-3.3 F)
2010-19.7 C (-3.5 F)
2011-19.5 C (-3.1 F)
2012-16.4 C (2.5 F)
2013-22.9 C (-9.2 F)
2014-14.5 C (5.9 F)
2015-14.0 C (6.8 F)
2016-19.0 C (-2.2 F)
2017-17.3 C (0.9 F)
2018-19.6 C (-3.3 F)
2019-16.8 C (1.8 F)
2020-15.5 C (4.1 F)
2021-12.8 C (9.0 F)
2022-19.6 C (-3.3 F)
2023-14.4 C (6.1 F)
2024-12.4 C (9.7 F)
2025-16.5 C (2.3 F)
2026-8.5 C (16.7 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Diamond Lake by year The wettest day of the year at Diamond Lake, 1980 to 2026. The record is 190.5 mm (7.5 in) in 1996, marked on the chart; the median year is 53.3 mm (2.1 in). 05010015020019801990200020102020Record: 190.5 mm (7.5 in) in 1996
The wettest day of the year at Diamond Lake, 1980 to 2026. The record is 190.5 mm (7.5 in) in 1996, marked on the chart; the median year is 53.3 mm (2.1 in).
Wettest day (Rx1day) at Diamond Lake by year
YearWettest day (Rx1day)
198033.0 mm (1.3 in)
198191.4 mm (3.6 in)
198245.7 mm (1.8 in)
198361.0 mm (2.4 in)
198450.8 mm (2.0 in)
198558.4 mm (2.3 in)
198655.9 mm (2.2 in)
198768.6 mm (2.7 in)
198858.4 mm (2.3 in)
198943.2 mm (1.7 in)
199071.1 mm (2.8 in)
199140.6 mm (1.6 in)
199243.2 mm (1.7 in)
199340.6 mm (1.6 in)
199443.2 mm (1.7 in)
199553.3 mm (2.1 in)
1996190.5 mm (7.5 in)
199766.0 mm (2.6 in)
199896.5 mm (3.8 in)
199933.0 mm (1.3 in)
200045.7 mm (1.8 in)
200145.7 mm (1.8 in)
200248.3 mm (1.9 in)
200363.5 mm (2.5 in)
200471.1 mm (2.8 in)
200578.7 mm (3.1 in)
200658.4 mm (2.3 in)
200755.9 mm (2.2 in)
200848.3 mm (1.9 in)
200953.3 mm (2.1 in)
201045.7 mm (1.8 in)
201140.6 mm (1.6 in)
201271.1 mm (2.8 in)
201394.0 mm (3.7 in)
2014104.1 mm (4.1 in)
201553.3 mm (2.1 in)
201655.9 mm (2.2 in)
201748.3 mm (1.9 in)
201835.6 mm (1.4 in)
201976.2 mm (3.0 in)
202045.7 mm (1.8 in)
202155.9 mm (2.2 in)
202238.1 mm (1.5 in)
202335.6 mm (1.4 in)
202453.3 mm (2.1 in)
202568.6 mm (2.7 in)
202645.7 mm (1.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Diamond Lake by year The wettest five days of the year at Diamond Lake, 1980 to 2026. The record is 264.2 mm (10.4 in) in 1996, marked on the chart; the median year is 132.0 mm (5.2 in). 010020030019801990200020102020Record: 264.2 mm (10.4 in) in 1996
The wettest five days of the year at Diamond Lake, 1980 to 2026. The record is 264.2 mm (10.4 in) in 1996, marked on the chart; the median year is 132.0 mm (5.2 in).
Wettest five days (Rx5day) at Diamond Lake by year
YearWettest five days (Rx5day)
198065.9 mm (2.6 in)
1981134.6 mm (5.3 in)
1982147.3 mm (5.8 in)
1983132.1 mm (5.2 in)
1984121.8 mm (4.8 in)
198583.9 mm (3.3 in)
1986139.7 mm (5.5 in)
1987142.2 mm (5.6 in)
1988147.3 mm (5.8 in)
198978.8 mm (3.1 in)
1990114.3 mm (4.5 in)
1991119.4 mm (4.7 in)
199288.8 mm (3.5 in)
199388.9 mm (3.5 in)
199483.8 mm (3.3 in)
1995139.6 mm (5.5 in)
1996264.2 mm (10.4 in)
1997220.9 mm (8.7 in)
1998203.2 mm (8.0 in)
1999109.3 mm (4.3 in)
2000155.0 mm (6.1 in)
200196.6 mm (3.8 in)
2002147.3 mm (5.8 in)
2003116.8 mm (4.6 in)
2004167.6 mm (6.6 in)
2005182.9 mm (7.2 in)
2006157.5 mm (6.2 in)
2007127.0 mm (5.0 in)
2008127.1 mm (5.0 in)
2009101.7 mm (4.0 in)
2010111.8 mm (4.4 in)
2011114.2 mm (4.5 in)
2012190.5 mm (7.5 in)
2013132.0 mm (5.2 in)
2014208.2 mm (8.2 in)
2015200.6 mm (7.9 in)
2016180.4 mm (7.1 in)
2017127.0 mm (5.0 in)
201861.0 mm (2.4 in)
2019152.4 mm (6.0 in)
2020119.3 mm (4.7 in)
202199.0 mm (3.9 in)
2022132.1 mm (5.2 in)
202386.4 mm (3.4 in)
2024177.8 mm (7.0 in)
2025147.4 mm (5.8 in)
202673.7 mm (2.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Diamond Lake by year The longest dry spell of the year at Diamond Lake, 1980 to 2026. The record is 105 days in 2018, marked on the chart; the median year is 42 days. 025507510012519801990200020102020Record: 105 days in 2018
The longest dry spell of the year at Diamond Lake, 1980 to 2026. The record is 105 days in 2018, marked on the chart; the median year is 42 days.
Longest dry spell (CDD) at Diamond Lake by year
YearLongest dry spell (CDD)
198010 days
198175 days
198250 days
198334 days
198437 days
198566 days
198671 days
198747 days
198833 days
198982 days
199025 days
199128 days
199223 days
199350 days
199486 days
199526 days
199646 days
199742 days
199828 days
199935 days
200040 days
200122 days
200265 days
200377 days
200453 days
200543 days
200644 days
200731 days
200826 days
200936 days
201025 days
201138 days
201241 days
201327 days
201436 days
201547 days
201656 days
201727 days
2018105 days
201969 days
202042 days
202125 days
202244 days
202340 days
202451 days
202575 days
202658 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

36 years with a frost

Across 36 years with a frost, the median last spring frost at Diamond Lake falls on 19 June and the median first autumn frost on 9 August, which leaves a median of 47 days between them.

Fitted over all years, the growing season changes by +29.2 days per decade at this station.

Frost dates and growing season at Diamond Lake
MeasureMedian, all yearsEarliest periodRecent period (1995 to 2025)Recent against earliestFitted trend
Last spring frost19 Junen/a19 Junen/a-4.2 days per decade
First autumn frost9 Augustn/a25 Augustn/a+25.0 days per decade
Growing days47 daysn/a64 daysn/a+29.2 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, 1981 to 2025

A day with at least 53.4 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 163.7 mm (6.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Diamond Lake: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years53.4 mm (2.1 in)
5 years71.7 mm (2.8 in)
10 years87.4 mm (3.4 in)
25 years112.4 mm (4.4 in)
50 years135.7 mm (5.3 in)Longer than the 44 years of record
100 years163.7 mm (6.4 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 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: 190.5 mm (7.5 in) in 1996; 104.1 mm (4.1 in) in 2014; 96.5 mm (3.8 in) in 1998.

Download the Data

  • Data for Diamond Lake standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Diamond 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-15).