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Built 2026-10-19 (19 October 2026)

Clackamas Lake Threshold Days by Year (USS0021D13S)

12 fixed thresholds counted per year at Clackamas Lake (USS0021D13S): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Clackamas Lake Thresholds

  • Clackamas Lake: days with 10 mm (0.39 in) or more of precipitation in 46 years, most in 1996 with 70.
  • Clackamas Lake: days with 25 mm (0.98 in) or more of precipitation in 46 years, most in 1996 with 28.
  • Clackamas Lake: days with a maximum temperature at or above 30 C (86 F) in 38 years, most in 1998 with 29.
  • Clackamas Lake: days with a maximum temperature at or below 0 C (32 F) in 38 years, most in 1990 with 66.
  • 12 fixed thresholds have at least one qualifying day at Clackamas Lake.
38 years with a qualifying day
Days at or above 30 C (86 F) per year at Clackamas Lake Days per year at Clackamas Lake with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 29 in 1998. 01020301989: 31990: 101991: 111992: 141993: 61994: 121995: 91996: 211997: 91998: 291999: 112000: 72001: 142002: 162003: 292004: 192005: 162006: 242007: 82008: 122009: 192010: 62011: 62012: 82013: 102014: 142015: 212016: 112017: 252018: 182019: 52020: 122021: 232022: 192023: 62024: 172025: 182026: 101989199319972001200520092013201720212025
Days per year at Clackamas Lake with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 29 in 1998.
Days at or above 30 C (86 F) per year at Clackamas Lake
YearDaysDecade average
198933
19901013.2
19911113.2
19921413.2
1993613.2
19941213.2
1995913.2
19962113.2
1997913.2
19982913.2
19991113.2
2000716.4
20011416.4
20021616.4
20032916.4
20041916.4
20051616.4
20062416.4
2007816.4
20081216.4
20091916.4
2010612.4
2011612.4
2012812.4
20131012.4
20141412.4
20152112.4
20161112.4
20172512.4
20181812.4
2019512.4
20201215
20212315
20221915
2023615
20241715
20251815
20261015
First to last qualifying date each year at Clackamas Lake For each year, a bar from the first to the last day at Clackamas Lake meeting 30 C (86 F). 1989: 25 July 1989 to 7 August 19891990: 10 July 1990 to 12 August 19901991: 2 July 1991 to 11 October 19911992: 6 May 1992 to 18 August 19921993: 4 August 1993 to 29 September 19931994: 7 July 1994 to 27 September 19941995: 1 July 1995 to 16 September 19951996: 6 June 1996 to 29 August 19961997: 4 July 1997 to 14 August 19971998: 16 July 1998 to 15 September 19981999: 10 July 1999 to 22 September 19992000: 28 June 2000 to 14 September 20002001: 22 May 2001 to 26 August 20012002: 25 June 2002 to 13 September 20022003: 6 June 2003 to 26 September 20032004: 22 June 2004 to 30 August 20042005: 14 July 2005 to 26 August 20052006: 16 May 2006 to 5 September 20062007: 4 July 2007 to 11 September 20072008: 28 June 2008 to 16 September 20082009: 3 July 2009 to 27 August 20092010: 8 July 2010 to 25 August 20102011: 24 July 2011 to 11 September 20112012: 7 July 2012 to 18 September 20122013: 30 June 2013 to 12 September 20132014: 7 July 2014 to 11 August 20142015: 7 June 2015 to 12 September 20152016: 5 June 2016 to 20 August 20162017: 19 June 2017 to 4 September 20172018: 12 July 2018 to 15 August 20182019: 12 June 2019 to 28 August 20192020: 23 June 2020 to 6 September 20202021: 1 June 2021 to 15 August 20212022: 27 June 2022 to 2 September 20222023: 15 July 2023 to 27 August 20232024: 5 July 2024 to 6 September 20242025: 7 June 2025 to 4 September 20252026: 15 June 2026 to 20 August 202619891994199920042009201420192024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Clackamas Lake meeting 30 C (86 F).
First to last qualifying date each year at Clackamas Lake
YearFirst dateLast date
19891989-07-251989-08-07
19901990-07-101990-08-12
19911991-07-021991-10-11
19921992-05-061992-08-18
19931993-08-041993-09-29
19941994-07-071994-09-27
19951995-07-011995-09-16
19961996-06-061996-08-29
19971997-07-041997-08-14
19981998-07-161998-09-15
19991999-07-101999-09-22
20002000-06-282000-09-14
20012001-05-222001-08-26
20022002-06-252002-09-13
20032003-06-062003-09-26
20042004-06-222004-08-30
20052005-07-142005-08-26
20062006-05-162006-09-05
20072007-07-042007-09-11
20082008-06-282008-09-16
20092009-07-032009-08-27
20102010-07-082010-08-25
20112011-07-242011-09-11
20122012-07-072012-09-18
20132013-06-302013-09-12
20142014-07-072014-08-11
20152015-06-072015-09-12
20162016-06-052016-08-20
20172017-06-192017-09-04
20182018-07-122018-08-15
20192019-06-122019-08-28
20202020-06-232020-09-06
20212021-06-012021-08-15
20222022-06-272022-09-02
20232023-07-152023-08-27
20242024-07-052024-09-06
20252025-06-072025-09-04
20262026-06-152026-08-20

Every Fixed Threshold

Fixed thresholds at Clackamas Lake
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3829199810
35 C (95 F): Days18519981
90 F (32.2 C): Days332119984
100 F (37.8 C): Days2220212
0 C (32 F): Ice days (max3866199012
0 C (32 F): Frost days (min332232008130
-10 C (14 F): Days with min332920137
-20 C (-4 F): Days with min15520133
10 mm (0.39 in): Days with 10 mm or more rain4670199625
25 mm (0.98 in): Days with 25 mm or more rain462819963
50 mm (1.97 in): Days with 50 mm or more rain35819963
100 mm (3.94 in): Days with 100 mm or more rain5119941

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1989.

Download the Data

  • Data for Clackamas 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). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-17).