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Built 2026-10-19 (19 October 2026)

London State Police Threshold Days by Year (USC00154905)

5 fixed thresholds counted per year at London State Police (USC00154905): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for London State Police Thresholds

  • London State Police: days with 10 mm (0.39 in) or more of precipitation in 26 years, most in 1996 with 62.
  • London State Police: days with 25 mm (0.98 in) or more of precipitation in 26 years, most in 1995 with 21.
  • London State Police: days with 50 mm (1.97 in) or more of precipitation in 23 years, most in 1989 with 5.
  • London State Police: days with 10 cm (3.9 in) or more of snowfall in 8 years, most in 1985 with 4.
  • 5 fixed thresholds have at least one qualifying day at London State Police.
26 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at London State Police Days per year at London State Police with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 62 in 1996. 0204060801982: 491983: 471984: 471985: 471986: 401987: 341988: 391989: 491990: 511991: 391992: 371993: 461994: 391995: 471996: 621997: 521998: 541999: 382000: 302005: 302006: 402007: 192011: 532015: 462016: 462017: 49198219851988199119941997200020072016
Days per year at London State Police with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 62 in 1996.
Days with 10 mm (0.39 in) or more of precipitation per year at London State Police
YearDaysDecade average
19824944
19834744
19844744
19854744
19864044
19873444
19883944
19894944
19905146.5
19913946.5
19923746.5
19934646.5
19943946.5
19954746.5
19966246.5
19975246.5
19985446.5
19993846.5
20003029.8
20053029.8
20064029.8
20071929.8
20115348.5
20154648.5
20164648.5
20174948.5
First to last qualifying date each year at London State Police For each year, a bar from the first to the last day at London State Police meeting 10 mm (0.39 in). 1982: 1 January 1982 to 26 December 19821983: 22 January 1983 to 28 December 19831984: 5 January 1984 to 31 December 19841985: 2 January 1985 to 13 December 19851986: 19 January 1986 to 24 December 19861987: 19 January 1987 to 28 December 19871988: 1 January 1988 to 28 December 19881989: 6 January 1989 to 31 December 19891990: 1 January 1990 to 31 December 19901991: 7 January 1991 to 29 December 19911992: 3 January 1992 to 23 December 19921993: 8 January 1993 to 16 December 19931994: 2 January 1994 to 11 December 19941995: 7 January 1995 to 19 December 19951996: 1 January 1996 to 24 December 19961997: 5 January 1997 to 25 December 19971998: 6 January 1998 to 27 December 19981999: 3 January 1999 to 13 December 19992000: 4 January 2000 to 13 December 20002005: 5 January 2005 to 25 December 20052006: 3 January 2006 to 26 December 20062007: 2 January 2007 to 16 December 20072011: 2 January 2011 to 27 December 20112015: 4 January 2015 to 25 December 20152016: 23 January 2016 to 27 December 20162017: 4 January 2017 to 24 December 20171982198619901994199820062016JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at London State Police meeting 10 mm (0.39 in).
First to last qualifying date each year at London State Police
YearFirst dateLast date
19821982-01-011982-12-26
19831983-01-221983-12-28
19841984-01-051984-12-31
19851985-01-021985-12-13
19861986-01-191986-12-24
19871987-01-191987-12-28
19881988-01-011988-12-28
19891989-01-061989-12-31
19901990-01-011990-12-31
19911991-01-071991-12-29
19921992-01-031992-12-23
19931993-01-081993-12-16
19941994-01-021994-12-11
19951995-01-071995-12-19
19961996-01-011996-12-24
19971997-01-051997-12-25
19981998-01-061998-12-27
19991999-01-031999-12-13
20002000-01-042000-12-13
20052005-01-052005-12-25
20062006-01-032006-12-26
20072007-01-022007-12-16
20112011-01-022011-12-27
20152015-01-042015-12-25
20162016-01-232016-12-27
20172017-01-042017-12-24

Every Fixed Threshold

Fixed thresholds at London State Police
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2662199649
25 mm (0.98 in): Days with 25 mm or more rain2621199515
50 mm (1.97 in): Days with 50 mm or more rain23519892
100 mm (3.94 in): Days with 100 mm or more rain4119861
10 cm (3.9 in): Days with 10 cm or more snowfall8419851

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1982.

Download the Data

  • Data for London State Police 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).