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

Grand Forks Af Threshold Days by Year (USW00094925)

15 fixed thresholds counted per year at Grand Forks Af (USW00094925): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Grand Forks Af Thresholds

  • Grand Forks Af: days with a maximum temperature at or above 30 C (86 F) in 10 years, most in 1961 with 39.
  • Grand Forks Af: days with a maximum temperature at or above 90 F (32.2 C) in 10 years, most in 1961 with 25.
  • Grand Forks Af: days with a maximum temperature at or below 0 C (32 F) in 10 years, most in 1970 with 119.
  • Grand Forks Af: nights with a minimum temperature at or below 0 C (32 F) in 10 years, most in 1966 with 197.
  • 15 fixed thresholds have at least one qualifying day at Grand Forks Af.
10 years with a qualifying day
Days at or above 30 C (86 F) per year at Grand Forks Af Days per year at Grand Forks Af with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 39 in 1961. 0102030401960: 281961: 391962: 111963: 301964: 151966: 171967: 201968: 91970: 392025: 241960196119621963196419661967196819702025
Days per year at Grand Forks Af with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 39 in 1961.
Days at or above 30 C (86 F) per year at Grand Forks Af
YearDaysDecade average
19602821.1
19613921.1
19621121.1
19633021.1
19641521.1
19661721.1
19672021.1
1968921.1
19703939
20252424
First to last qualifying date each year at Grand Forks Af For each year, a bar from the first to the last day at Grand Forks Af meeting 30 C (86 F). 1960: 31 May 1960 to 20 September 19601961: 4 June 1961 to 1 September 19611962: 27 June 1962 to 2 September 19621963: 30 May 1963 to 26 September 19631964: 20 May 1964 to 5 August 19641966: 21 May 1966 to 12 September 19661967: 24 May 1967 to 25 September 19671968: 1 May 1968 to 14 September 19681970: 17 May 1970 to 19 September 19702025: 11 May 2025 to 3 October 202519601962196419671970JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Grand Forks Af meeting 30 C (86 F).
First to last qualifying date each year at Grand Forks Af
YearFirst dateLast date
19601960-05-311960-09-20
19611961-06-041961-09-01
19621962-06-271962-09-02
19631963-05-301963-09-26
19641964-05-201964-08-05
19661966-05-211966-09-12
19671967-05-241967-09-25
19681968-05-011968-09-14
19701970-05-171970-09-19
20252025-05-112025-10-03

Every Fixed Threshold

Fixed thresholds at Grand Forks Af
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1039196124
35 C (95 F): Days7819613
90 F (32.2 C): Days102519618
100 F (37.8 C): Days2219611
0 C (32 F): Ice days (max10119197079
0 C (32 F): Frost days (min101971966160
-10 C (14 F): Days with min10129197081
-20 C (-4 F): Days with min1064196634
-30 C (-22 F): Days with min101519671
20 C (68 F): Tropical nights (min7919705
10 mm (0.39 in): Days with 10 mm or more rain1019196617
25 mm (0.98 in): Days with 25 mm or more rain10819665
50 mm (1.97 in): Days with 50 mm or more rain3319641
10 cm (3.9 in): Days with 10 cm or more snowfall8319601
25 cm (9.8 in): Days with 25 cm or more snowfall1119661

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1960.

Download the Data

  • Data for Grand Forks Af 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).