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Built 2026-10-19 (19 October 2026)

Hayward Rs Threshold Days by Year (USC00473511)

19 fixed thresholds counted per year at Hayward Rs (USC00473511): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hayward Rs Thresholds

  • Hayward Rs: days with 10 mm (0.39 in) or more of precipitation in 86 years, most in 1951 with 38.
  • Hayward Rs: days with 25 mm (0.98 in) or more of precipitation in 86 years, most in 1900 with 12.
  • Hayward Rs: days with 10 cm (3.9 in) or more of snowfall in 69 years, most in 2014 with 8.
  • Hayward Rs: days with 50 mm (1.97 in) or more of precipitation in 58 years, most in 1954 with 4.
  • 19 fixed thresholds have at least one qualifying day at Hayward Rs.
52 years with a qualifying day
Days at or above 30 C (86 F) per year at Hayward Rs Days per year at Hayward Rs with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 47 in 1894. 02040601894: 471895: 131896: 241898: 281900: 341901: 341902: 181903: 51904: 11906: 121907: 31909: 131910: 341911: 231913: 281914: 231915: 121916: 231917: 181918: 161934: 321935: 231936: 341940: 161998: 201999: 232000: 52001: 302002: 292003: 232004: 92005: 292006: 352007: 452008: 162009: 142010: 302011: 272012: 352013: 212014: 102015: 82017: 132018: 262019: 132020: 262021: 322022: 172023: 312024: 172025: 262026: 38189419021910191719982004201020172023
Days per year at Hayward Rs with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 47 in 1894.
Days at or above 30 C (86 F) per year at Hayward Rs
YearDaysDecade average
18944728
18951328
18962428
18982828
19003415
19013415
19021815
1903515
1904115
19061215
1907315
19091315
19103422.1
19112322.1
19132822.1
19142322.1
19151222.1
19162322.1
19171822.1
19181622.1
19343229.7
19352329.7
19363429.7
19401616
19982021.5
19992321.5
2000523.5
20013023.5
20022923.5
20032323.5
2004923.5
20052923.5
20063523.5
20074523.5
20081623.5
20091423.5
20103020.3
20112720.3
20123520.3
20132120.3
20141020.3
2015820.3
20171320.3
20182620.3
20191320.3
20202626.7
20213226.7
20221726.7
20233126.7
20241726.7
20252626.7
20263826.7
First to last qualifying date each year at Hayward Rs For each year, a bar from the first to the last day at Hayward Rs meeting 30 C (86 F). 1894: 7 June 1894 to 28 September 18941895: 9 May 1895 to 19 September 18951896: 6 May 1896 to 14 August 18961898: 23 May 1898 to 29 September 18981900: 12 May 1900 to 10 September 19001901: 1 May 1901 to 5 September 19011902: 18 May 1902 to 28 August 19021903: 7 July 1903 to 21 August 19031904: 16 July 1904 to 16 July 19041906: 16 June 1906 to 10 September 19061907: 17 June 1907 to 31 August 19071909: 20 June 1909 to 27 August 19091910: 13 June 1910 to 20 August 19101911: 17 May 1911 to 15 August 19111913: 10 June 1913 to 6 September 19131914: 25 May 1914 to 3 October 19141915: 19 April 1915 to 5 September 19151916: 18 July 1916 to 21 August 19161917: 17 June 1917 to 18 August 19171918: 5 May 1918 to 26 August 19181934: 1 May 1934 to 18 August 19341935: 3 July 1935 to 24 September 19351936: 16 May 1936 to 22 September 19361940: 12 May 1940 to 20 September 19401998: 14 May 1998 to 20 September 19981999: 30 May 1999 to 5 September 19992000: 8 June 2000 to 2 August 20002001: 16 May 2001 to 23 August 20012002: 16 April 2002 to 10 September 20022003: 23 June 2003 to 12 September 20032004: 7 June 2004 to 3 September 20042005: 24 June 2005 to 12 September 20052006: 28 May 2006 to 5 August 20062007: 11 May 2007 to 7 September 20072008: 2 July 2008 to 2 September 20082009: 20 May 2009 to 15 August 20092010: 21 May 2010 to 31 August 20102011: 6 June 2011 to 13 September 20112012: 19 May 2012 to 5 September 20122013: 15 May 2013 to 8 September 20132014: 26 May 2014 to 4 August 20142015: 19 July 2015 to 6 September 20152017: 5 June 2017 to 25 September 20172018: 8 May 2018 to 17 September 20182019: 31 May 2019 to 5 August 20192020: 2 June 2020 to 27 August 20202021: 2 May 2021 to 20 September 20212022: 14 June 2022 to 3 September 20222023: 31 May 2023 to 3 October 20232024: 5 June 2024 to 29 September 20242025: 7 May 2025 to 5 October 20252026: 25 May 2026 to 11 October 202618941903191319352002200920172024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hayward Rs meeting 30 C (86 F).
First to last qualifying date each year at Hayward Rs
YearFirst dateLast date
18941894-06-071894-09-28
18951895-05-091895-09-19
18961896-05-061896-08-14
18981898-05-231898-09-29
19001900-05-121900-09-10
19011901-05-011901-09-05
19021902-05-181902-08-28
19031903-07-071903-08-21
19041904-07-161904-07-16
19061906-06-161906-09-10
19071907-06-171907-08-31
19091909-06-201909-08-27
19101910-06-131910-08-20
19111911-05-171911-08-15
19131913-06-101913-09-06
19141914-05-251914-10-03
19151915-04-191915-09-05
19161916-07-181916-08-21
19171917-06-171917-08-18
19181918-05-051918-08-26
19341934-05-011934-08-18
19351935-07-031935-09-24
19361936-05-161936-09-22
19401940-05-121940-09-20
19981998-05-141998-09-20
19991999-05-301999-09-05
20002000-06-082000-08-02
20012001-05-162001-08-23
20022002-04-162002-09-10
20032003-06-232003-09-12
20042004-06-072004-09-03
20052005-06-242005-09-12
20062006-05-282006-08-05
20072007-05-112007-09-07
20082008-07-022008-09-02
20092009-05-202009-08-15
20102010-05-212010-08-31
20112011-06-062011-09-13
20122012-05-192012-09-05
20132013-05-152013-09-08
20142014-05-262014-08-04
20152015-07-192015-09-06
20172017-06-052017-09-25
20182018-05-082018-09-17
20192019-05-312019-08-05
20202020-06-022020-08-27
20212021-05-022021-09-20
20222022-06-142022-09-03
20232023-05-312023-10-03
20242024-06-052024-09-29
20252025-05-072025-10-05
20262026-05-252026-10-11

Every Fixed Threshold

Fixed thresholds at Hayward Rs
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days5247189438
35 C (95 F): Days241018941
40 C (104 F): Days2519365
90 F (32.2 C): Days512418947
100 F (37.8 C): Days4719362
0 C (32 F): Ice days (max52104189535
0 C (32 F): Frost days (min482221917106
-10 C (14 F): Days with min48113193645
-20 C (-4 F): Days with min4858191720
-30 C (-22 F): Days with min462919364
-40 C (-40 F): Days with min6318953
20 C (68 F): Tropical nights (min462620059
25 C (77 F): Days with min6520051
10 mm (0.39 in): Days with 10 mm or more rain8638195112
25 mm (0.98 in): Days with 25 mm or more rain861219003
50 mm (1.97 in): Days with 50 mm or more rain58419541
100 mm (3.94 in): Days with 100 mm or more rain5119561
10 cm (3.9 in): Days with 10 cm or more snowfall69820144
25 cm (9.8 in): Days with 25 cm or more snowfall18219821

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

  • Data for Hayward Rs 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).