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

H4 Threshold Days by Year (JOM00040250)

5 fixed thresholds counted per year at H4 (JOM00040250): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for H4 Thresholds

  • H4: days with a maximum temperature at or above 30 C (86 F) in 1 years, most in 2006 with 159.
  • H4: days with a maximum temperature at or above 35 C (95 F) in 1 years, most in 2006 with 108.
  • H4: days with a maximum temperature at or above 40 C (104 F) in 1 years, most in 2006 with 27.
  • H4: days with a maximum temperature at or above 90 F (32.2 C) in 1 years, most in 2006 with 143.
  • 5 fixed thresholds have at least one qualifying day at H4.
1 years with a qualifying day
Days at or above 30 C (86 F) per year at H4 Days per year at H4 with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 159 in 2006. 0501001502002006: 1592006
Days per year at H4 with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 159 in 2006.
Days at or above 30 C (86 F) per year at H4
YearDaysDecade average
2006159159
First to last qualifying date each year at H4 For each year, a bar from the first to the last day at H4 meeting 30 C (86 F). 2006: 9 April 2006 to 24 October 20062006JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at H4 meeting 30 C (86 F).
First to last qualifying date each year at H4
YearFirst dateLast date
20062006-04-092006-10-24

Every Fixed Threshold

Fixed thresholds at H4
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days11592006159
35 C (95 F): Days11082006108
40 C (104 F): Days127200627
90 F (32.2 C): Days11432006143
100 F (37.8 C): Days164200664

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2006.

Download the Data

  • Data for H4 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).