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

Hollis Threshold Days by Year (USC00503650)

11 fixed thresholds counted per year at Hollis (USC00503650): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hollis Thresholds

  • Hollis: days with a maximum temperature at or below 0 C (32 F) in 17 years, most in 1956 with 52.
  • Hollis: days with 10 mm (0.39 in) or more of precipitation in 17 years, most in 1991 with 107.
  • Hollis: days with 25 mm (0.98 in) or more of precipitation in 17 years, most in 1991 with 33.
  • Hollis: nights with a minimum temperature at or below 0 C (32 F) in 16 years, most in 1956 with 165.
  • 11 fixed thresholds have at least one qualifying day at Hollis.
6 years with a qualifying day
Days at or above 30 C (86 F) per year at Hollis Days per year at Hollis with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 2 in 1958. 011221958: 21961: 11990: 11992: 12013: 22015: 1195819611990199220132015
Days per year at Hollis with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 2 in 1958.
Days at or above 30 C (86 F) per year at Hollis
YearDaysDecade average
195822
196111
199011
199211
201321.5
201511.5
First to last qualifying date each year at Hollis For each year, a bar from the first to the last day at Hollis meeting 30 C (86 F). 1958: 6 June 1958 to 7 June 19581961: 31 July 1961 to 31 July 19611990: 14 June 1990 to 14 June 19901992: 30 June 1992 to 30 June 19922013: 18 July 2013 to 31 July 20132015: 7 July 2015 to 7 July 2015195819611990199220132015JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hollis meeting 30 C (86 F).
First to last qualifying date each year at Hollis
YearFirst dateLast date
19581958-06-061958-06-07
19611961-07-311961-07-31
19901990-06-141990-06-14
19921992-06-301992-06-30
20132013-07-182013-07-31
20152015-07-072015-07-07

Every Fixed Threshold

Fixed thresholds at Hollis
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days6219581
90 F (32.2 C): Days1119581
0 C (32 F): Ice days (max175219564
0 C (32 F): Frost days (min16165195664
-10 C (14 F): Days with min111919564
10 mm (0.39 in): Days with 10 mm or more rain17107199177
25 mm (0.98 in): Days with 25 mm or more rain1733199115
50 mm (1.97 in): Days with 50 mm or more rain16619583
100 mm (3.94 in): Days with 100 mm or more rain3119611
10 cm (3.9 in): Days with 10 cm or more snowfall81219901
25 cm (9.8 in): Days with 25 cm or more snowfall1120131

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1958.

Download the Data

  • Data for Hollis 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).