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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Grand Haven Wwtp Threshold Days by Year (USC00203295)

14 fixed thresholds counted per year at Grand Haven Wwtp (USC00203295): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Grand Haven Wwtp Thresholds

  • Grand Haven Wwtp: days with 10 mm (0.39 in) or more of precipitation in 18 years, most in 2019 with 37.
  • Grand Haven Wwtp: days with 25 mm (0.98 in) or more of precipitation in 18 years, most in 2013 with 11.
  • Grand Haven Wwtp: days with 10 cm (3.9 in) or more of snowfall in 14 years, most in 2013 with 9.
  • Grand Haven Wwtp: days with 50 mm (1.97 in) or more of precipitation in 13 years, most in 1949 with 2.
  • 14 fixed thresholds have at least one qualifying day at Grand Haven Wwtp.
12 years with a qualifying day
Days at or above 30 C (86 F) per year at Grand Haven Wwtp Days per year at Grand Haven Wwtp with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 29 in 2012. 01020302009: 22010: 82011: 162012: 292013: 132014: 22015: 62016: 142017: 122018: 282019: 62021: 13200920112013201520172019
Days per year at Grand Haven Wwtp with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 29 in 2012.
Days at or above 30 C (86 F) per year at Grand Haven Wwtp
YearDaysDecade average
200922
2010813.4
20111613.4
20122913.4
20131313.4
2014213.4
2015613.4
20161413.4
20171213.4
20182813.4
2019613.4
20211313
First to last qualifying date each year at Grand Haven Wwtp For each year, a bar from the first to the last day at Grand Haven Wwtp meeting 30 C (86 F). 2009: 25 June 2009 to 17 August 20092010: 25 May 2010 to 31 August 20102011: 31 May 2011 to 3 September 20112012: 21 May 2012 to 4 September 20122013: 20 May 2013 to 30 September 20132014: 2 June 2014 to 28 June 20142015: 19 July 2015 to 7 September 20152016: 20 June 2016 to 7 September 20162017: 12 June 2017 to 27 September 20172018: 28 May 2018 to 5 September 20182019: 5 July 2019 to 20 July 20192021: 7 June 2021 to 20 September 2021200920112013201520172019JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Grand Haven Wwtp meeting 30 C (86 F).
First to last qualifying date each year at Grand Haven Wwtp
YearFirst dateLast date
20092009-06-252009-08-17
20102010-05-252010-08-31
20112011-05-312011-09-03
20122012-05-212012-09-04
20132013-05-202013-09-30
20142014-06-022014-06-28
20152015-07-192015-09-07
20162016-06-202016-09-07
20172017-06-122017-09-27
20182018-05-282018-09-05
20192019-07-052019-07-20
20212021-06-072021-09-20

Every Fixed Threshold

Fixed thresholds at Grand Haven Wwtp
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1229201213
35 C (95 F): Days2220182
90 F (32.2 C): Days611201811
0 C (32 F): Ice days (max1282201433
0 C (32 F): Frost days (min81502010126
-10 C (14 F): Days with min857201414
-20 C (-4 F): Days with min4520152
20 C (68 F): Tropical nights (min720201119
25 C (77 F): Days with min2120131
10 mm (0.39 in): Days with 10 mm or more rain1837201924
25 mm (0.98 in): Days with 25 mm or more rain181120135
50 mm (1.97 in): Days with 50 mm or more rain13219491
10 cm (3.9 in): Days with 10 cm or more snowfall14920135
25 cm (9.8 in): Days with 25 cm or more snowfall4120091

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2009.

Download the Data

  • Data for Grand Haven Wwtp 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 (2025-12-31).