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Built 2026-10-19 (19 October 2026)

Hollis Threshold Days by Year (USC00173862)

16 fixed thresholds counted per year at Hollis (USC00173862): 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 above 30 C (86 F) in 32 years, most in 2002 with 35.
  • Hollis: days with a maximum temperature at or above 90 F (32.2 C) in 32 years, most in 2002 with 23.
  • Hollis: days with a maximum temperature at or below 0 C (32 F) in 32 years, most in 2003 with 69.
  • Hollis: nights with a minimum temperature at or below 0 C (32 F) in 32 years, most in 1997 with 197.
  • 16 fixed thresholds have at least one qualifying day at Hollis.
32 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 35 in 2002. 0102030401995: 321996: 161997: 231998: 141999: 342000: 82001: 342002: 352003: 192004: 82005: 272006: 162007: 222008: 92009: 102010: 292011: 212012: 212013: 212014: 122015: 212016: 272017: 152018: 242019: 172020: 272021: 192022: 292023: 112024: 252025: 272026: 1819951999200320072011201520192023
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 35 in 2002.
Days at or above 30 C (86 F) per year at Hollis
YearDaysDecade average
19953223.8
19961623.8
19972323.8
19981423.8
19993423.8
2000818.8
20013418.8
20023518.8
20031918.8
2004818.8
20052718.8
20061618.8
20072218.8
2008918.8
20091018.8
20102920.8
20112120.8
20122120.8
20132120.8
20141220.8
20152120.8
20162720.8
20171520.8
20182420.8
20191720.8
20202722.3
20211922.3
20222922.3
20231122.3
20242522.3
20252722.3
20261822.3
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). 1995: 1 June 1995 to 22 August 19951996: 12 June 1996 to 6 September 19961997: 11 June 1997 to 18 August 19971998: 1 April 1998 to 11 August 19981999: 31 May 1999 to 10 September 19992000: 8 May 2000 to 2 September 20002001: 25 April 2001 to 10 September 20012002: 18 April 2002 to 11 September 20022003: 21 May 2003 to 23 August 20032004: 20 April 2004 to 29 August 20042005: 5 June 2005 to 13 September 20052006: 30 May 2006 to 3 August 20062007: 10 May 2007 to 27 September 20072008: 28 May 2008 to 17 July 20082009: 26 April 2009 to 20 August 20092010: 25 May 2010 to 4 September 20102011: 28 May 2011 to 5 September 20112012: 17 April 2012 to 10 August 20122013: 31 May 2013 to 12 September 20132014: 10 June 2014 to 28 August 20142015: 11 May 2015 to 10 September 20152016: 26 May 2016 to 10 September 20162017: 18 May 2017 to 23 August 20172018: 3 May 2018 to 7 September 20182019: 29 June 2019 to 20 August 20192020: 23 May 2020 to 25 August 20202021: 27 May 2021 to 27 August 20212022: 13 May 2022 to 31 August 20222023: 29 May 2023 to 8 September 20232024: 23 May 2024 to 3 August 20242025: 6 June 2025 to 18 August 20252026: 20 May 2026 to 10 August 202619951999200320072011201520192023JanFebMarAprMayJunJulAugSepOctNovDec
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
19951995-06-011995-08-22
19961996-06-121996-09-06
19971997-06-111997-08-18
19981998-04-011998-08-11
19991999-05-311999-09-10
20002000-05-082000-09-02
20012001-04-252001-09-10
20022002-04-182002-09-11
20032003-05-212003-08-23
20042004-04-202004-08-29
20052005-06-052005-09-13
20062006-05-302006-08-03
20072007-05-102007-09-27
20082008-05-282008-07-17
20092009-04-262009-08-20
20102010-05-252010-09-04
20112011-05-282011-09-05
20122012-04-172012-08-10
20132013-05-312013-09-12
20142014-06-102014-08-28
20152015-05-112015-09-10
20162016-05-262016-09-10
20172017-05-182017-08-23
20182018-05-032018-09-07
20192019-06-292019-08-20
20202020-05-232020-08-25
20212021-05-272021-08-27
20222022-05-132022-08-31
20232023-05-292023-09-08
20242024-05-232024-08-03
20252025-06-062025-08-18
20262026-05-202026-08-10

Every Fixed Threshold

Fixed thresholds at Hollis
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3235200218
35 C (95 F): Days13520021
90 F (32.2 C): Days322320027
0 C (32 F): Ice days (max3269200336
0 C (32 F): Frost days (min321971997120
-10 C (14 F): Days with min3284201953
-20 C (-4 F): Days with min3136201513
-30 C (-22 F): Days with min6320033
20 C (68 F): Tropical nights (min24620034
10 mm (0.39 in): Days with 10 mm or more rain3262200522
25 mm (0.98 in): Days with 25 mm or more rain322220056
50 mm (1.97 in): Days with 50 mm or more rain29820062
100 mm (3.94 in): Days with 100 mm or more rain12319961
10 cm (3.9 in): Days with 10 cm or more snowfall321219964
25 cm (9.8 in): Days with 25 cm or more snowfall21520051
50 cm (19.7 in): Days with 50 cm or more snowfall3120131

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1995.

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 (2026-10-17).