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

Colebrook Threshold Days by Year (USC00331755)

13 fixed thresholds counted per year at Colebrook (USC00331755): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Colebrook Thresholds

  • Colebrook: days with a maximum temperature at or above 30 C (86 F) in 7 years, most in 1900 with 71.
  • Colebrook: days with a maximum temperature at or below 0 C (32 F) in 7 years, most in 1895 with 52.
  • Colebrook: days with a maximum temperature at or above 90 F (32.2 C) in 6 years, most in 1900 with 23.
  • Colebrook: days with 10 mm (0.39 in) or more of precipitation in 6 years, most in 1905 with 36.
  • 13 fixed thresholds have at least one qualifying day at Colebrook.
7 years with a qualifying day
Days at or above 30 C (86 F) per year at Colebrook Days per year at Colebrook with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 71 in 1900. 0204060801895: 371896: 231897: 231899: 401900: 711901: 351905: 31895189618971899190019011905
Days per year at Colebrook with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 71 in 1900.
Days at or above 30 C (86 F) per year at Colebrook
YearDaysDecade average
18953730.8
18962330.8
18972330.8
18994030.8
19007136.3
19013536.3
1905336.3
First to last qualifying date each year at Colebrook For each year, a bar from the first to the last day at Colebrook meeting 30 C (86 F). 1895: 4 May 1895 to 22 September 18951896: 18 April 1896 to 12 September 18961897: 24 June 1897 to 16 September 18971899: 30 April 1899 to 7 September 18991900: 15 May 1900 to 7 October 19001901: 5 June 1901 to 19 August 19011905: 18 June 1905 to 18 July 19051895189618971899190019011905JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Colebrook meeting 30 C (86 F).
First to last qualifying date each year at Colebrook
YearFirst dateLast date
18951895-05-041895-09-22
18961896-04-181896-09-12
18971897-06-241897-09-16
18991899-04-301899-09-07
19001900-05-151900-10-07
19011901-06-051901-08-19
19051905-06-181905-07-18

Every Fixed Threshold

Fixed thresholds at Colebrook
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days77119003
35 C (95 F): Days3418971
90 F (32.2 C): Days623190019
0 C (32 F): Ice days (max752189541
0 C (32 F): Frost days (min51671895142
-10 C (14 F): Days with min562189543
-20 C (-4 F): Days with min51518958
-30 C (-22 F): Days with min2218992
20 C (68 F): Tropical nights (min52918965
10 mm (0.39 in): Days with 10 mm or more rain636190536
25 mm (0.98 in): Days with 25 mm or more rain6719057
50 mm (1.97 in): Days with 50 mm or more rain5218932
100 mm (3.94 in): Days with 100 mm or more rain10n/a1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1895.

Download the Data

  • Data for Colebrook 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).