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Built 2026-10-19 (19 October 2026)

Derby 1 S Threshold Days by Year (USC00412417)

6 fixed thresholds counted per year at Derby 1 S (USC00412417): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Derby 1 S Thresholds

  • Derby 1 S: days with 10 mm (0.39 in) or more of precipitation in 32 years, most in 2007 with 35.
  • Derby 1 S: days with 25 mm (0.98 in) or more of precipitation in 32 years, most in 2007 with 13.
  • Derby 1 S: days with 50 mm (1.97 in) or more of precipitation in 30 years, most in 1985 with 4.
  • Derby 1 S: days with 100 mm (3.94 in) or more of precipitation in 9 years, most in 1980 with 2.
  • 6 fixed thresholds have at least one qualifying day at Derby 1 S.
32 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Derby 1 S Days per year at Derby 1 S with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 35 in 2007. 0102030401979: 171980: 161981: 271982: 201983: 191984: 221985: 231986: 221987: 211988: 121989: 201990: 201991: 221992: 261993: 171996: 151997: 191998: 201999: 152000: 202001: 182004: 282005: 122006: 82007: 352008: 142009: 152011: 62012: 162013: 162014: 112015: 2119791983198719911997200120072012
Days per year at Derby 1 S with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 35 in 2007.
Days with 10 mm (0.39 in) or more of precipitation per year at Derby 1 S
YearDaysDecade average
19791717
19801620.2
19812720.2
19822020.2
19831920.2
19842220.2
19852320.2
19862220.2
19872120.2
19881220.2
19892020.2
19902019.3
19912219.3
19922619.3
19931719.3
19961519.3
19971919.3
19982019.3
19991519.3
20002018.8
20011818.8
20042818.8
20051218.8
2006818.8
20073518.8
20081418.8
20091518.8
2011614
20121614
20131614
20141114
20152114
First to last qualifying date each year at Derby 1 S For each year, a bar from the first to the last day at Derby 1 S meeting 10 mm (0.39 in). 1979: 11 January 1979 to 29 December 19791980: 13 April 1980 to 15 December 19801981: 19 January 1981 to 31 December 19811982: 20 February 1982 to 27 December 19821983: 20 January 1983 to 6 November 19831984: 9 January 1984 to 31 December 19841985: 27 January 1985 to 27 November 19851986: 8 January 1986 to 23 December 19861987: 18 January 1987 to 20 December 19871988: 17 April 1988 to 29 October 19881989: 20 January 1989 to 2 December 19891990: 21 February 1990 to 8 November 19901991: 18 January 1991 to 22 December 19911992: 5 January 1992 to 15 December 19921993: 7 January 1993 to 19 December 19931996: 29 April 1996 to 29 November 19961997: 12 February 1997 to 12 November 19971998: 7 January 1998 to 29 December 19981999: 2 January 1999 to 17 October 19992000: 7 January 2000 to 24 December 20002001: 2 January 2001 to 8 December 20012004: 13 January 2004 to 23 November 20042005: 24 February 2005 to 28 October 20052006: 20 March 2006 to 30 December 20062007: 6 January 2007 to 30 September 20072008: 11 March 2008 to 16 October 20082009: 12 March 2009 to 30 December 20092011: 9 January 2011 to 22 December 20112012: 18 February 2012 to 27 October 20122013: 9 January 2013 to 26 November 20132014: 10 March 2014 to 6 November 20142015: 15 January 2015 to 31 October 201519791983198719911997200120072012JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Derby 1 S meeting 10 mm (0.39 in).
First to last qualifying date each year at Derby 1 S
YearFirst dateLast date
19791979-01-111979-12-29
19801980-04-131980-12-15
19811981-01-191981-12-31
19821982-02-201982-12-27
19831983-01-201983-11-06
19841984-01-091984-12-31
19851985-01-271985-11-27
19861986-01-081986-12-23
19871987-01-181987-12-20
19881988-04-171988-10-29
19891989-01-201989-12-02
19901990-02-211990-11-08
19911991-01-181991-12-22
19921992-01-051992-12-15
19931993-01-071993-12-19
19961996-04-291996-11-29
19971997-02-121997-11-12
19981998-01-071998-12-29
19991999-01-021999-10-17
20002000-01-072000-12-24
20012001-01-022001-12-08
20042004-01-132004-11-23
20052005-02-242005-10-28
20062006-03-202006-12-30
20072007-01-062007-09-30
20082008-03-112008-10-16
20092009-03-122009-12-30
20112011-01-092011-12-22
20122012-02-182012-10-27
20132013-01-092013-11-26
20142014-03-102014-11-06
20152015-01-152015-10-31

Every Fixed Threshold

Fixed thresholds at Derby 1 S
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3235200721
25 mm (0.98 in): Days with 25 mm or more rain321320079
50 mm (1.97 in): Days with 50 mm or more rain30419851
100 mm (3.94 in): Days with 100 mm or more rain9219801
200 mm (7.87 in): Days with 200 mm or more rain2119801
10 cm (3.9 in): Days with 10 cm or more snowfall1119851

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1979.

Download the Data

  • Data for Derby 1 S 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).