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

Zap Threshold Days by Year (USC00329650)

18 fixed thresholds counted per year at Zap (USC00329650): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Zap Thresholds

  • Zap: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 1986 with 21.
  • Zap: days with 25 mm (0.98 in) or more of precipitation in 32 years, most in 1986 with 8.
  • Zap: days with 10 cm (3.9 in) or more of snowfall in 24 years, most in 1985 with 6.
  • Zap: days with 50 mm (1.97 in) or more of precipitation in 9 years, most in 1990 with 4.
  • 18 fixed thresholds have at least one qualifying day at Zap.
5 years with a qualifying day
Days at or above 30 C (86 F) per year at Zap Days per year at Zap with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 40 in 1917. 0102030401914: 221915: 91916: 271917: 401918: 2019141915191619171918
Days per year at Zap with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 40 in 1917.
Days at or above 30 C (86 F) per year at Zap
YearDaysDecade average
19142223.6
1915923.6
19162723.6
19174023.6
19182023.6
First to last qualifying date each year at Zap For each year, a bar from the first to the last day at Zap meeting 30 C (86 F). 1914: 8 July 1914 to 18 September 19141915: 14 April 1915 to 4 September 19151916: 3 July 1916 to 3 September 19161917: 10 June 1917 to 23 September 19171918: 4 May 1918 to 22 September 191819141915191619171918JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Zap meeting 30 C (86 F).
First to last qualifying date each year at Zap
YearFirst dateLast date
19141914-07-081914-09-18
19151915-04-141915-09-04
19161916-07-031916-09-03
19171917-06-101917-09-23
19181918-05-041918-09-22

Every Fixed Threshold

Fixed thresholds at Zap
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days540191720
35 C (95 F): Days416191716
40 C (104 F): Days1119171
90 F (32.2 C): Days533191711
100 F (37.8 C): Days1419174
0 C (32 F): Ice days (max5100191775
0 C (32 F): Frost days (min52281917204
-10 C (14 F): Days with min599191591
-20 C (-4 F): Days with min569191637
-30 C (-22 F): Days with min528191617
-40 C (-40 F): Days with min3419163
20 C (68 F): Tropical nights (min3819178
25 C (77 F): Days with min1119171
10 mm (0.39 in): Days with 10 mm or more rain3521198614
25 mm (0.98 in): Days with 25 mm or more rain32819863
50 mm (1.97 in): Days with 50 mm or more rain9419901
10 cm (3.9 in): Days with 10 cm or more snowfall24619854
25 cm (9.8 in): Days with 25 cm or more snowfall3119911

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1914.

Download the Data

  • Data for Zap 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).