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

White Mtn Threshold Days by Year (USC00509798)

12 fixed thresholds counted per year at White Mtn (USC00509798): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for White Mtn Thresholds

  • White Mtn: nights with a minimum temperature at or below 0 C (32 F) in 14 years, most in 1930 with 281.
  • White Mtn: nights with a minimum temperature at or below -10 C (14 F) in 14 years, most in 1930 with 174.
  • White Mtn: nights with a minimum temperature at or below -20 C (-4 F) in 14 years, most in 1933 with 98.
  • White Mtn: nights with a minimum temperature at or below -30 C (-22 F) in 14 years, most in 1925 with 35.
  • 12 fixed thresholds have at least one qualifying day at White Mtn.
14 years with a qualifying day
Nights at or below 0 C (32 F) per year at White Mtn Days per year at White Mtn with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 281 in 1930. 01002003001922: 2461924: 2741925: 2311926: 2421927: 2211929: 2221930: 2811931: 2501933: 2541937: 2331940: 2261943: 2112024: 2232025: 2181922192519271930193319402024
Days per year at White Mtn with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 281 in 1930.
Nights at or below 0 C (32 F) per year at White Mtn
YearDaysDecade average
1922246239.3
1924274239.3
1925231239.3
1926242239.3
1927221239.3
1929222239.3
1930281254.5
1931250254.5
1933254254.5
1937233254.5
1940226218.5
1943211218.5
2024223220.5
2025218220.5
First to last qualifying date each year at White Mtn For each year, a bar from the first to the last day at White Mtn meeting 0 C (32 F). 1922: 4 January 1922 to 31 December 19221924: 1 January 1924 to 31 December 19241925: 1 January 1925 to 31 December 19251926: 1 January 1926 to 31 December 19261927: 4 January 1927 to 31 December 19271929: 1 January 1929 to 31 December 19291930: 1 January 1930 to 31 December 19301931: 1 January 1931 to 31 December 19311933: 1 January 1933 to 31 December 19331937: 1 January 1937 to 29 December 19371940: 1 January 1940 to 31 December 19401943: 1 January 1943 to 31 December 19432024: 1 January 2024 to 31 December 20242025: 1 January 2025 to 31 December 20251922192519271930193319402024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at White Mtn meeting 0 C (32 F).
First to last qualifying date each year at White Mtn
YearFirst dateLast date
19221922-01-041922-12-31
19241924-01-011924-12-31
19251925-01-011925-12-31
19261926-01-011926-12-31
19271927-01-041927-12-31
19291929-01-011929-12-31
19301930-01-011930-12-31
19311931-01-011931-12-31
19331933-01-011933-12-31
19371937-01-011937-12-29
19401940-01-011940-12-31
19431943-01-011943-12-31
20242024-01-012024-12-31
20252025-01-012025-12-31

Every Fixed Threshold

Fixed thresholds at White Mtn
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2619261
90 F (32.2 C): Days1119291
0 C (32 F): Ice days (max131911924151
0 C (32 F): Frost days (min142811930218
-10 C (14 F): Days with min141741930121
-20 C (-4 F): Days with min1498193335
-30 C (-22 F): Days with min143519252
-40 C (-40 F): Days with min8619332
20 C (68 F): Tropical nights (min10n/a1
10 mm (0.39 in): Days with 10 mm or more rain101319241
25 mm (0.98 in): Days with 25 mm or more rain6619292
50 mm (1.97 in): Days with 50 mm or more rain2119241

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1926.

Download the Data

  • Data for White Mtn 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).