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Built 2026-10-19 (19 October 2026)

Blue Hill 4 SW Threshold Days by Year (USC00250961)

6 fixed thresholds counted per year at Blue Hill 4 SW (USC00250961): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Blue Hill 4 SW Thresholds

  • Blue Hill 4 SW: days with 10 mm (0.39 in) or more of precipitation in 66 years, most in 1993 with 40.
  • Blue Hill 4 SW: days with 25 mm (0.98 in) or more of precipitation in 66 years, most in 1993 with 13.
  • Blue Hill 4 SW: days with 10 cm (3.9 in) or more of snowfall in 54 years, most in 1961 with 5.
  • Blue Hill 4 SW: days with 50 mm (1.97 in) or more of precipitation in 45 years, most in 1977 with 4.
  • 6 fixed thresholds have at least one qualifying day at Blue Hill 4 SW.
66 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Blue Hill 4 SW Days per year at Blue Hill 4 SW with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1993. 0102030401957: 201958: 161959: 241960: 251961: 251962: 161963: 171964: 171965: 311966: 141967: 121968: 221969: 301970: 201971: 221972: 231973: 291974: 131975: 181976: 211977: 261978: 201979: 281980: 171981: 311982: 191983: 281984: 241985: 161986: 201987: 261988: 121989: 161990: 231991: 161992: 261993: 401994: 221995: 181996: 201997: 211998: 221999: 172000: 182001: 282002: 212003: 142004: 202005: 202006: 232007: 272008: 302009: 132010: 262012: 192013: 172014: 172015: 192016: 192017: 242018: 222022: 162023: 182024: 272025: 202026: 201957196419711978198519921999200620142024
Days per year at Blue Hill 4 SW with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1993.
Days with 10 mm (0.39 in) or more of precipitation per year at Blue Hill 4 SW
YearDaysDecade average
19572020
19581620
19592420
19602520.9
19612520.9
19621620.9
19631720.9
19641720.9
19653120.9
19661420.9
19671220.9
19682220.9
19693020.9
19702022
19712222
19722322
19732922
19741322
19751822
19762122
19772622
19782022
19792822
19801720.9
19813120.9
19821920.9
19832820.9
19842420.9
19851620.9
19862020.9
19872620.9
19881220.9
19891620.9
19902322.5
19911622.5
19922622.5
19934022.5
19942222.5
19951822.5
19962022.5
19972122.5
19982222.5
19991722.5
20001821.4
20012821.4
20022121.4
20031421.4
20042021.4
20052021.4
20062321.4
20072721.4
20083021.4
20091321.4
20102620.4
20121920.4
20131720.4
20141720.4
20151920.4
20161920.4
20172420.4
20182220.4
20221620.2
20231820.2
20242720.2
20252020.2
20262020.2
First to last qualifying date each year at Blue Hill 4 SW For each year, a bar from the first to the last day at Blue Hill 4 SW meeting 10 mm (0.39 in). 1957: 18 March 1957 to 31 December 19571958: 27 February 1958 to 6 September 19581959: 21 March 1959 to 31 October 19591960: 2 January 1960 to 30 October 19601961: 6 March 1961 to 17 December 19611962: 18 February 1962 to 20 October 19621963: 13 March 1963 to 17 October 19631964: 15 February 1964 to 15 November 19641965: 23 January 1965 to 19 October 19651966: 9 February 1966 to 28 December 19661967: 6 May 1967 to 18 September 19671968: 3 April 1968 to 22 December 19681969: 14 February 1969 to 30 October 19691970: 18 April 1970 to 24 October 19701971: 3 January 1971 to 17 November 19711972: 24 March 1972 to 14 November 19721973: 4 March 1973 to 24 December 19731974: 11 April 1974 to 3 November 19741975: 10 March 1975 to 20 November 19751976: 21 February 1976 to 7 October 19761977: 11 March 1977 to 9 November 19771978: 13 February 1978 to 26 November 19781979: 13 January 1979 to 29 December 19791980: 16 January 1980 to 27 October 19801981: 4 March 1981 to 1 December 19811982: 4 March 1982 to 28 December 19821983: 2 February 1983 to 28 November 19831984: 18 February 1984 to 16 December 19841985: 4 March 1985 to 19 October 19851986: 12 March 1986 to 7 December 19861987: 17 March 1987 to 27 December 19871988: 17 March 1988 to 28 September 19881989: 27 January 1989 to 27 October 19891990: 20 January 1990 to 3 November 19901991: 17 March 1991 to 12 December 19911992: 1 January 1992 to 14 December 19921993: 10 January 1993 to 13 December 19931994: 26 January 1994 to 6 December 19941995: 26 January 1995 to 4 October 19951996: 15 April 1996 to 17 November 19961997: 30 April 1997 to 30 November 19971998: 10 February 1998 to 10 November 19981999: 9 March 1999 to 23 November 19992000: 24 February 2000 to 12 November 20002001: 9 February 2001 to 24 November 20012002: 31 January 2002 to 30 October 20022003: 6 April 2003 to 3 November 20032004: 26 January 2004 to 19 November 20042005: 5 January 2005 to 28 November 20052006: 19 March 2006 to 31 December 20062007: 21 January 2007 to 11 December 20072008: 17 March 2008 to 11 November 20082009: 29 April 2009 to 9 December 20092010: 6 March 2010 to 17 November 20102012: 3 February 2012 to 20 December 20122013: 22 February 2013 to 6 November 20132014: 24 April 2014 to 23 October 20142015: 1 February 2015 to 14 December 20152016: 2 February 2016 to 26 December 20162017: 17 January 2017 to 7 October 20172018: 19 March 2018 to 27 December 20182022: 22 March 2022 to 13 December 20222023: 19 January 2023 to 16 December 20232024: 9 January 2024 to 19 November 20242025: 19 March 2025 to 25 October 20252026: 8 January 2026 to 1 October 202619571966197519841993200220122024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Blue Hill 4 SW meeting 10 mm (0.39 in).
First to last qualifying date each year at Blue Hill 4 SW
YearFirst dateLast date
19571957-03-181957-12-31
19581958-02-271958-09-06
19591959-03-211959-10-31
19601960-01-021960-10-30
19611961-03-061961-12-17
19621962-02-181962-10-20
19631963-03-131963-10-17
19641964-02-151964-11-15
19651965-01-231965-10-19
19661966-02-091966-12-28
19671967-05-061967-09-18
19681968-04-031968-12-22
19691969-02-141969-10-30
19701970-04-181970-10-24
19711971-01-031971-11-17
19721972-03-241972-11-14
19731973-03-041973-12-24
19741974-04-111974-11-03
19751975-03-101975-11-20
19761976-02-211976-10-07
19771977-03-111977-11-09
19781978-02-131978-11-26
19791979-01-131979-12-29
19801980-01-161980-10-27
19811981-03-041981-12-01
19821982-03-041982-12-28
19831983-02-021983-11-28
19841984-02-181984-12-16
19851985-03-041985-10-19
19861986-03-121986-12-07
19871987-03-171987-12-27
19881988-03-171988-09-28
19891989-01-271989-10-27
19901990-01-201990-11-03
19911991-03-171991-12-12
19921992-01-011992-12-14
19931993-01-101993-12-13
19941994-01-261994-12-06
19951995-01-261995-10-04
19961996-04-151996-11-17
19971997-04-301997-11-30
19981998-02-101998-11-10
19991999-03-091999-11-23
20002000-02-242000-11-12
20012001-02-092001-11-24
20022002-01-312002-10-30
20032003-04-062003-11-03
20042004-01-262004-11-19
20052005-01-052005-11-28
20062006-03-192006-12-31
20072007-01-212007-12-11
20082008-03-172008-11-11
20092009-04-292009-12-09
20102010-03-062010-11-17
20122012-02-032012-12-20
20132013-02-222013-11-06
20142014-04-242014-10-23
20152015-02-012015-12-14
20162016-02-022016-12-26
20172017-01-172017-10-07
20182018-03-192018-12-27
20222022-03-222022-12-13
20232023-01-192023-12-16
20242024-01-092024-11-19
20252025-03-192025-10-25
20262026-01-082026-10-01

Every Fixed Threshold

Fixed thresholds at Blue Hill 4 SW
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain6640199320
25 mm (0.98 in): Days with 25 mm or more rain661319938
50 mm (1.97 in): Days with 50 mm or more rain45419773
100 mm (3.94 in): Days with 100 mm or more rain8119651
10 cm (3.9 in): Days with 10 cm or more snowfall54519611
25 cm (9.8 in): Days with 25 cm or more snowfall12119781

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1957.

Download the Data

  • Data for Blue Hill 4 SW 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).