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Built 2026-10-19 (19 October 2026)

High Level A Threshold Days by Year (CA003073146)

13 fixed thresholds counted per year at High Level A (CA003073146): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for High Level A Thresholds

  • High Level A: days with a maximum temperature at or below 0 C (32 F) in 12 years, most in 1972 with 153.
  • High Level A: nights with a minimum temperature at or below 0 C (32 F) in 12 years, most in 1972 with 244.
  • High Level A: nights with a minimum temperature at or below -10 C (14 F) in 12 years, most in 1972 with 158.
  • High Level A: nights with a minimum temperature at or below -20 C (-4 F) in 12 years, most in 1982 with 114.
  • 13 fixed thresholds have at least one qualifying day at High Level A.
10 years with a qualifying day
Days at or above 30 C (86 F) per year at High Level A Days per year at High Level A with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 7 in 1981. 024681971: 61972: 21973: 11974: 21975: 51977: 11978: 11981: 71982: 41983: 21971197219731974197519771978198119821983
Days per year at High Level A with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 7 in 1981.
Days at or above 30 C (86 F) per year at High Level A
YearDaysDecade average
197162.6
197222.6
197312.6
197422.6
197552.6
197712.6
197812.6
198174.3
198244.3
198324.3
First to last qualifying date each year at High Level A For each year, a bar from the first to the last day at High Level A meeting 30 C (86 F). 1971: 12 May 1971 to 2 August 19711972: 21 May 1972 to 29 May 19721973: 20 July 1973 to 20 July 19731974: 21 June 1974 to 4 August 19741975: 2 July 1975 to 12 July 19751977: 25 April 1977 to 25 April 19771978: 3 August 1978 to 3 August 19781981: 12 July 1981 to 26 August 19811982: 12 June 1982 to 28 July 19821983: 30 May 1983 to 10 August 198319711973197519781982JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at High Level A meeting 30 C (86 F).
First to last qualifying date each year at High Level A
YearFirst dateLast date
19711971-05-121971-08-02
19721972-05-211972-05-29
19731973-07-201973-07-20
19741974-06-211974-08-04
19751975-07-021975-07-12
19771977-04-251977-04-25
19781978-08-031978-08-03
19811981-07-121981-08-26
19821982-06-121982-07-28
19831983-05-301983-08-10

Every Fixed Threshold

Fixed thresholds at High Level A
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days10719812
35 C (95 F): Days1119811
90 F (32.2 C): Days3319712
0 C (32 F): Ice days (max121531972148
0 C (32 F): Frost days (min122441972237
-10 C (14 F): Days with min121581972142
-20 C (-4 F): Days with min12114198295
-30 C (-22 F): Days with min1261197228
-40 C (-40 F): Days with min121919725
10 mm (0.39 in): Days with 10 mm or more rain121519737
25 mm (0.98 in): Days with 25 mm or more rain8219711
50 mm (1.97 in): Days with 50 mm or more rain1119731
10 cm (3.9 in): Days with 10 cm or more snowfall12419732

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1971.

Download the Data

  • Data for High Level A 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).