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Built 2026-10-19 (19 October 2026)

Hiko Threshold Days by Year (USC00263671)

16 fixed thresholds counted per year at Hiko (USC00263671): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hiko Thresholds

  • Hiko: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 2005 with 10.
  • Hiko: days with a maximum temperature at or above 30 C (86 F) in 32 years, most in 2024 with 140.
  • Hiko: days with a maximum temperature at or above 35 C (95 F) in 32 years, most in 2024 with 82.
  • Hiko: days with a maximum temperature at or above 90 F (32.2 C) in 32 years, most in 2024 with 122.
  • 16 fixed thresholds have at least one qualifying day at Hiko.
32 years with a qualifying day
Days at or above 30 C (86 F) per year at Hiko Days per year at Hiko with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 140 in 2024. 0501001501990: 851991: 1141992: 1111993: 1121994: 1251995: 1001996: 1291997: 1171998: 802004: 1092005: 932006: 1162007: 1262008: 1182009: 1292010: 1122011: 1072012: 1292013: 1072014: 1132015: 1112016: 992017: 1072018: 1272019: 982020: 1352021: 1212022: 1192023: 972024: 1402025: 1182026: 14119901994199820072011201520192023
Days per year at Hiko with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 140 in 2024.
Days at or above 30 C (86 F) per year at Hiko
YearDaysDecade average
199085108.1
1991114108.1
1992111108.1
1993112108.1
1994125108.1
1995100108.1
1996129108.1
1997117108.1
199880108.1
2004109115.2
200593115.2
2006116115.2
2007126115.2
2008118115.2
2009129115.2
2010112111
2011107111
2012129111
2013107111
2014113111
2015111111
201699111
2017107111
2018127111
201998111
2020135124.4
2021121124.4
2022119124.4
202397124.4
2024140124.4
2025118124.4
2026141124.4
First to last qualifying date each year at Hiko For each year, a bar from the first to the last day at Hiko meeting 30 C (86 F). 1990: 15 April 1990 to 16 September 19901991: 9 May 1991 to 19 October 19911992: 28 April 1992 to 14 October 19921993: 12 May 1993 to 5 October 19931994: 18 April 1994 to 29 September 19941995: 1 June 1995 to 19 October 19951996: 9 April 1996 to 12 October 19961997: 6 May 1997 to 5 October 19971998: 2 June 1998 to 26 September 19982004: 3 May 2004 to 29 September 20042005: 21 May 2005 to 9 September 20052006: 13 May 2006 to 1 October 20062007: 14 March 2007 to 16 September 20072008: 17 May 2008 to 27 October 20082009: 22 April 2009 to 30 September 20092010: 1 June 2010 to 16 October 20102011: 7 May 2011 to 17 October 20112012: 22 April 2012 to 5 October 20122013: 29 April 2013 to 18 September 20132014: 4 May 2014 to 9 October 20142015: 30 May 2015 to 15 October 20152016: 31 May 2016 to 28 September 20162017: 5 May 2017 to 14 September 20172018: 27 April 2018 to 1 October 20182019: 27 April 2019 to 26 September 20192020: 27 April 2020 to 21 October 20202021: 1 May 2021 to 4 October 20212022: 15 May 2022 to 16 October 20222023: 30 April 2023 to 22 October 20232024: 22 April 2024 to 16 October 20242025: 11 April 2025 to 25 September 20252026: 18 March 2026 to 9 October 202619901994199820072011201520192023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hiko meeting 30 C (86 F).
First to last qualifying date each year at Hiko
YearFirst dateLast date
19901990-04-151990-09-16
19911991-05-091991-10-19
19921992-04-281992-10-14
19931993-05-121993-10-05
19941994-04-181994-09-29
19951995-06-011995-10-19
19961996-04-091996-10-12
19971997-05-061997-10-05
19981998-06-021998-09-26
20042004-05-032004-09-29
20052005-05-212005-09-09
20062006-05-132006-10-01
20072007-03-142007-09-16
20082008-05-172008-10-27
20092009-04-222009-09-30
20102010-06-012010-10-16
20112011-05-072011-10-17
20122012-04-222012-10-05
20132013-04-292013-09-18
20142014-05-042014-10-09
20152015-05-302015-10-15
20162016-05-312016-09-28
20172017-05-052017-09-14
20182018-04-272018-10-01
20192019-04-272019-09-26
20202020-04-272020-10-21
20212021-05-012021-10-04
20222022-05-152022-10-16
20232023-04-302023-10-22
20242024-04-222024-10-16
20252025-04-112025-09-25
20262026-03-182026-10-09

Every Fixed Threshold

Fixed thresholds at Hiko
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days321402024141
35 C (95 F): Days3282202464
40 C (104 F): Days231419962
90 F (32.2 C): Days321222024105
100 F (37.8 C): Days3237199422
110 F (43.3 C): Days1119981
0 C (32 F): Ice days (max11619903
0 C (32 F): Frost days (min28146201146
-10 C (14 F): Days with min241819902
-20 C (-4 F): Days with min1319903
20 C (68 F): Tropical nights (min2815202418
25 C (77 F): Days with min1120101
10 mm (0.39 in): Days with 10 mm or more rain351020057
25 mm (0.98 in): Days with 25 mm or more rain19320101
50 mm (1.97 in): Days with 50 mm or more rain3220061
10 cm (3.9 in): Days with 10 cm or more snowfall6220191

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1990.

Download the Data

  • Data for Hiko 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).