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Built 2026-10-19 (19 October 2026)

Imperial Co AP Threshold Days by Year (USW00003144)

15 fixed thresholds counted per year at Imperial Co AP (USW00003144): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Imperial Co AP Thresholds

  • Imperial Co AP: days with a maximum temperature at or above 30 C (86 F) in 43 years, most in 2016 with 237.
  • Imperial Co AP: days with a maximum temperature at or above 35 C (95 F) in 43 years, most in 2020 with 169.
  • Imperial Co AP: days with a maximum temperature at or above 40 C (104 F) in 43 years, most in 2020 with 109.
  • Imperial Co AP: days with a maximum temperature at or above 45 C (113 F) in 43 years, most in 2016 with 29.
  • 15 fixed thresholds have at least one qualifying day at Imperial Co AP.
43 years with a qualifying day
Days at or above 30 C (86 F) per year at Imperial Co AP Days per year at Imperial Co AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 237 in 2016. 01002003001962: 2061963: 2011964: 1931965: 1971966: 2151967: 1981968: 2091969: 1951970: 1931971: 1851972: 2101973: 1921974: 1901975: 1661976: 1791977: 1851978: 1801979: 1821980: 1772001: 2132002: 1902003: 1942004: 2092005: 1772006: 1992007: 2222008: 2152009: 2052010: 1842011: 1982012: 2082013: 2142014: 2232015: 2142016: 2372017: 2212018: 2082019: 1992020: 1982021: 2122022: 2092023: 1842026: 210196219671972197720022007201220172022
Days per year at Imperial Co AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 237 in 2016.
Days at or above 30 C (86 F) per year at Imperial Co AP
YearDaysDecade average
1962206201.8
1963201201.8
1964193201.8
1965197201.8
1966215201.8
1967198201.8
1968209201.8
1969195201.8
1970193186.2
1971185186.2
1972210186.2
1973192186.2
1974190186.2
1975166186.2
1976179186.2
1977185186.2
1978180186.2
1979182186.2
1980177177
2001213202.7
2002190202.7
2003194202.7
2004209202.7
2005177202.7
2006199202.7
2007222202.7
2008215202.7
2009205202.7
2010184210.6
2011198210.6
2012208210.6
2013214210.6
2014223210.6
2015214210.6
2016237210.6
2017221210.6
2018208210.6
2019199210.6
2020198202.6
2021212202.6
2022209202.6
2023184202.6
2026210202.6
First to last qualifying date each year at Imperial Co AP For each year, a bar from the first to the last day at Imperial Co AP meeting 30 C (86 F). 1962: 26 March 1962 to 21 November 19621963: 3 February 1963 to 13 November 19631964: 18 March 1964 to 24 December 19641965: 20 February 1965 to 8 November 19651966: 11 March 1966 to 3 November 19661967: 1 March 1967 to 18 November 19671968: 20 February 1968 to 23 November 19681969: 18 March 1969 to 4 November 19691970: 14 March 1970 to 2 November 19701971: 18 January 1971 to 4 November 19711972: 27 February 1972 to 24 October 19721973: 6 April 1973 to 12 November 19731974: 14 March 1974 to 21 October 19741975: 21 April 1975 to 6 November 19751976: 16 January 1976 to 7 November 19761977: 16 February 1977 to 25 November 19771978: 25 March 1978 to 8 November 19781979: 8 March 1979 to 28 October 19791980: 8 April 1980 to 9 November 19802001: 19 March 2001 to 9 November 20012002: 23 February 2002 to 23 November 20022003: 31 January 2003 to 29 October 20032004: 8 March 2004 to 16 October 20042005: 8 March 2005 to 14 November 20052006: 24 March 2006 to 20 November 20062007: 7 March 2007 to 19 November 20072008: 11 March 2008 to 20 November 20082009: 25 February 2009 to 10 November 20092010: 17 March 2010 to 15 November 20102011: 17 January 2011 to 1 November 20112012: 23 February 2012 to 24 November 20122013: 3 March 2013 to 14 November 20132014: 13 February 2014 to 10 November 20142015: 9 February 2015 to 2 November 20152016: 9 February 2016 to 15 November 20162017: 9 March 2017 to 26 November 20172018: 4 February 2018 to 6 November 20182019: 18 March 2019 to 18 November 20192020: 6 March 2020 to 18 November 20202021: 19 March 2021 to 15 November 20212022: 11 February 2022 to 1 November 20222023: 2 April 2023 to 6 November 20232026: 4 February 2026 to 10 October 202619621968197419802006201220182026JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Imperial Co AP meeting 30 C (86 F).
First to last qualifying date each year at Imperial Co AP
YearFirst dateLast date
19621962-03-261962-11-21
19631963-02-031963-11-13
19641964-03-181964-12-24
19651965-02-201965-11-08
19661966-03-111966-11-03
19671967-03-011967-11-18
19681968-02-201968-11-23
19691969-03-181969-11-04
19701970-03-141970-11-02
19711971-01-181971-11-04
19721972-02-271972-10-24
19731973-04-061973-11-12
19741974-03-141974-10-21
19751975-04-211975-11-06
19761976-01-161976-11-07
19771977-02-161977-11-25
19781978-03-251978-11-08
19791979-03-081979-10-28
19801980-04-081980-11-09
20012001-03-192001-11-09
20022002-02-232002-11-23
20032003-01-312003-10-29
20042004-03-082004-10-16
20052005-03-082005-11-14
20062006-03-242006-11-20
20072007-03-072007-11-19
20082008-03-112008-11-20
20092009-02-252009-11-10
20102010-03-172010-11-15
20112011-01-172011-11-01
20122012-02-232012-11-24
20132013-03-032013-11-14
20142014-02-132014-11-10
20152015-02-092015-11-02
20162016-02-092016-11-15
20172017-03-092017-11-26
20182018-02-042018-11-06
20192019-03-182019-11-18
20202020-03-062020-11-18
20212021-03-192021-11-15
20222022-02-112022-11-01
20232023-04-022023-11-06
20262026-02-042026-10-10

Every Fixed Threshold

Fixed thresholds at Imperial Co AP
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days432372016210
35 C (95 F): Days431692020170
40 C (104 F): Days431092020104
45 C (113 F): Days4329201625
50 C (122 F): Days1120171
90 F (32.2 C): Days431962017192
100 F (37.8 C): Days431442020140
110 F (43.3 C): Days4353201651
120 F (48.9 C): Days8220171
0 C (32 F): Frost days (min382619641
20 C (68 F): Tropical nights (min431362015138
25 C (77 F): Days with min4387202282
10 mm (0.39 in): Days with 10 mm or more rain33419761
25 mm (0.98 in): Days with 25 mm or more rain11219771
50 mm (1.97 in): Days with 50 mm or more rain2119761

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1962.

Download the Data

  • Data for Imperial Co 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).