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Built 2026-10-19 (19 October 2026)

Dennison Wtr Wks Threshold Days by Year (USC00332160)

15 fixed thresholds counted per year at Dennison Wtr Wks (USC00332160): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Dennison Wtr Wks Thresholds

  • Dennison Wtr Wks: days with a maximum temperature at or above 30 C (86 F) in 33 years, most in 1991 with 85.
  • Dennison Wtr Wks: days with a maximum temperature at or below 0 C (32 F) in 33 years, most in 2010 with 58.
  • Dennison Wtr Wks: days with 10 mm (0.39 in) or more of precipitation in 33 years, most in 2011 with 52.
  • Dennison Wtr Wks: days with 25 mm (0.98 in) or more of precipitation in 33 years, most in 2019 with 14.
  • 15 fixed thresholds have at least one qualifying day at Dennison Wtr Wks.
33 years with a qualifying day
Days at or above 30 C (86 F) per year at Dennison Wtr Wks Days per year at Dennison Wtr Wks with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 85 in 1991. 02550751001989: 401990: 391991: 851992: 331993: 531994: 561998: 791999: 722002: 732003: 522004: 142005: 462006: 192007: 512008: 332009: 132010: 532011: 422012: 642013: 232014: 372015: 462016: 702017: 372018: 512019: 522020: 522021: 522022: 362023: 262024: 542025: 502026: 38198919932002200620102014201820222026
Days per year at Dennison Wtr Wks with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 85 in 1991.
Days at or above 30 C (86 F) per year at Dennison Wtr Wks
YearDaysDecade average
19894040
19903959.6
19918559.6
19923359.6
19935359.6
19945659.6
19987959.6
19997259.6
20027337.6
20035237.6
20041437.6
20054637.6
20061937.6
20075137.6
20083337.6
20091337.6
20105347.5
20114247.5
20126447.5
20132347.5
20143747.5
20154647.5
20167047.5
20173747.5
20185147.5
20195247.5
20205244
20215244
20223644
20232644
20245444
20255044
20263844
First to last qualifying date each year at Dennison Wtr Wks For each year, a bar from the first to the last day at Dennison Wtr Wks meeting 30 C (86 F). 1989: 30 May 1989 to 9 September 19891990: 25 April 1990 to 11 September 19901991: 11 May 1991 to 16 September 19911992: 13 May 1992 to 7 September 19921993: 9 May 1993 to 14 September 19931994: 25 April 1994 to 16 September 19941998: 28 March 1998 to 27 September 19981999: 4 May 1999 to 28 September 19992002: 16 April 2002 to 4 October 20022003: 15 April 2003 to 14 September 20032004: 8 June 2004 to 28 August 20042005: 5 June 2005 to 29 August 20052006: 28 May 2006 to 31 July 20062007: 23 May 2007 to 8 October 20072008: 5 June 2008 to 14 September 20082009: 25 April 2009 to 17 August 20092010: 26 May 2010 to 24 September 20102011: 11 May 2011 to 3 September 20112012: 3 May 2012 to 7 September 20122013: 30 May 2013 to 12 September 20132014: 9 May 2014 to 6 September 20142015: 8 May 2015 to 10 September 20152016: 28 May 2016 to 24 September 20162017: 17 May 2017 to 28 September 20172018: 26 May 2018 to 10 October 20182019: 19 May 2019 to 4 October 20192020: 25 May 2020 to 10 September 20202021: 20 May 2021 to 19 September 20212022: 25 April 2022 to 22 September 20222023: 2 June 2023 to 7 September 20232024: 3 May 2024 to 23 September 20242025: 25 April 2025 to 22 September 20252026: 19 May 2026 to 10 September 20261989199420042009201420192024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Dennison Wtr Wks meeting 30 C (86 F).
First to last qualifying date each year at Dennison Wtr Wks
YearFirst dateLast date
19891989-05-301989-09-09
19901990-04-251990-09-11
19911991-05-111991-09-16
19921992-05-131992-09-07
19931993-05-091993-09-14
19941994-04-251994-09-16
19981998-03-281998-09-27
19991999-05-041999-09-28
20022002-04-162002-10-04
20032003-04-152003-09-14
20042004-06-082004-08-28
20052005-06-052005-08-29
20062006-05-282006-07-31
20072007-05-232007-10-08
20082008-06-052008-09-14
20092009-04-252009-08-17
20102010-05-262010-09-24
20112011-05-112011-09-03
20122012-05-032012-09-07
20132013-05-302013-09-12
20142014-05-092014-09-06
20152015-05-082015-09-10
20162016-05-282016-09-24
20172017-05-172017-09-28
20182018-05-262018-10-10
20192019-05-192019-10-04
20202020-05-252020-09-10
20212021-05-202021-09-19
20222022-04-252022-09-22
20232023-06-022023-09-07
20242024-05-032024-09-23
20252025-04-252025-09-22
20262026-05-192026-09-10

Every Fixed Threshold

Fixed thresholds at Dennison Wtr Wks
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3385199138
35 C (95 F): Days192320022
90 F (32.2 C): Days3251199913
100 F (37.8 C): Days3320021
0 C (32 F): Ice days (max3358201032
0 C (32 F): Frost days (min28159199375
-10 C (14 F): Days with min2844200328
-20 C (-4 F): Days with min169201410
-30 C (-22 F): Days with min1219892
20 C (68 F): Tropical nights (min2528202129
10 mm (0.39 in): Days with 10 mm or more rain3352201134
25 mm (0.98 in): Days with 25 mm or more rain331420195
50 mm (1.97 in): Days with 50 mm or more rain16519982
10 cm (3.9 in): Days with 10 cm or more snowfall10320182
25 cm (9.8 in): Days with 25 cm or more snowfall2119871

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 Dennison Wtr Wks 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).