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Built 2026-10-19 (19 October 2026)

Hayward Muni AP Threshold Days by Year (USW00094973)

16 fixed thresholds counted per year at Hayward Muni AP (USW00094973): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hayward Muni AP Thresholds

  • Hayward Muni AP: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 2006 with 50.
  • Hayward Muni AP: days with a maximum temperature at or below 0 C (32 F) in 30 years, most in 2014 with 113.
  • Hayward Muni AP: nights with a minimum temperature at or below 0 C (32 F) in 30 years, most in 2002 with 209.
  • Hayward Muni AP: nights with a minimum temperature at or below -10 C (14 F) in 30 years, most in 2013 with 103.
  • 16 fixed thresholds have at least one qualifying day at Hayward Muni AP.
30 years with a qualifying day
Days at or above 30 C (86 F) per year at Hayward Muni AP Days per year at Hayward Muni AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 50 in 2006. 02040601997: 51998: 91999: 132000: 42001: 182002: 142003: 122004: 62005: 342006: 502007: 472008: 182009: 72010: 122011: 132012: 252013: 182014: 52015: 52016: 102017: 42018: 152019: 92020: 172021: 202022: 112023: 192024: 72025: 112026: 141997200020032006200920122015201820212024
Days per year at Hayward Muni AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 50 in 2006.
Days at or above 30 C (86 F) per year at Hayward Muni AP
YearDaysDecade average
199759
199899
1999139
2000421
20011821
20021421
20031221
2004621
20053421
20065021
20074721
20081821
2009721
20101211.6
20111311.6
20122511.6
20131811.6
2014511.6
2015511.6
20161011.6
2017411.6
20181511.6
2019911.6
20201714.1
20212014.1
20221114.1
20231914.1
2024714.1
20251114.1
20261414.1
First to last qualifying date each year at Hayward Muni AP For each year, a bar from the first to the last day at Hayward Muni AP meeting 30 C (86 F). 1997: 12 June 1997 to 2 August 19971998: 14 May 1998 to 19 September 19981999: 6 June 1999 to 3 September 19992000: 8 June 2000 to 31 July 20002001: 15 May 2001 to 22 August 20012002: 30 May 2002 to 8 September 20022003: 26 July 2003 to 8 September 20032004: 7 June 2004 to 2 September 20042005: 7 June 2005 to 11 September 20052006: 27 May 2006 to 5 September 20062007: 29 April 2007 to 6 September 20072008: 25 June 2008 to 2 September 20082009: 20 May 2009 to 14 August 20092010: 24 May 2010 to 30 August 20102011: 6 June 2011 to 31 July 20112012: 18 May 2012 to 4 September 20122013: 5 July 2013 to 7 September 20132014: 26 May 2014 to 26 July 20142015: 26 July 2015 to 5 September 20152016: 6 May 2016 to 10 August 20162017: 10 June 2017 to 23 September 20172018: 16 May 2018 to 15 September 20182019: 31 May 2019 to 4 August 20192020: 2 June 2020 to 26 August 20202021: 4 June 2021 to 23 August 20212022: 14 June 2022 to 22 July 20222023: 31 May 2023 to 1 October 20232024: 14 July 2024 to 16 September 20242025: 2 June 2025 to 8 August 20252026: 26 May 2026 to 3 September 202619972001200520092013201720212025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hayward Muni AP meeting 30 C (86 F).
First to last qualifying date each year at Hayward Muni AP
YearFirst dateLast date
19971997-06-121997-08-02
19981998-05-141998-09-19
19991999-06-061999-09-03
20002000-06-082000-07-31
20012001-05-152001-08-22
20022002-05-302002-09-08
20032003-07-262003-09-08
20042004-06-072004-09-02
20052005-06-072005-09-11
20062006-05-272006-09-05
20072007-04-292007-09-06
20082008-06-252008-09-02
20092009-05-202009-08-14
20102010-05-242010-08-30
20112011-06-062011-07-31
20122012-05-182012-09-04
20132013-07-052013-09-07
20142014-05-262014-07-26
20152015-07-262015-09-05
20162016-05-062016-08-10
20172017-06-102017-09-23
20182018-05-162018-09-15
20192019-05-312019-08-04
20202020-06-022020-08-26
20212021-06-042021-08-23
20222022-06-142022-07-22
20232023-05-312023-10-01
20242024-07-142024-09-16
20252025-06-022025-08-08
20262026-05-262026-09-03

Every Fixed Threshold

Fixed thresholds at Hayward Muni AP
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3050200614
35 C (95 F): Days101120061
40 C (104 F): Days1220062
90 F (32.2 C): Days273020063
100 F (37.8 C): Days2420064
0 C (32 F): Ice days (max30113201445
0 C (32 F): Frost days (min302092002111
-10 C (14 F): Days with min30103201347
-20 C (-4 F): Days with min3058201419
-30 C (-22 F): Days with min251620144
20 C (68 F): Tropical nights (min231320057
25 C (77 F): Days with min3120051
10 mm (0.39 in): Days with 10 mm or more rain273620144
25 mm (0.98 in): Days with 25 mm or more rain271320191
50 mm (1.97 in): Days with 50 mm or more rain16420161
100 mm (3.94 in): Days with 100 mm or more rain2120051

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1997.

Download the Data

  • Data for Hayward Muni AP 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).