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Built 2026-10-18 (18 October 2026)

Willesley Threshold Days by Year

5 fixed thresholds counted per year at Willesley (ASN00036072): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Willesley Thresholds

  • Willesley: days with 10 mm (0.39 in) or more of precipitation in 34 years, most in 2000 with 28.
  • Willesley: days with 25 mm (0.98 in) or more of precipitation in 34 years, most in 1974 with 15.
  • Willesley: days with 50 mm (1.97 in) or more of precipitation in 31 years, most in 1975 with 4.
  • Willesley: days with 100 mm (3.94 in) or more of precipitation in 7 years, most in 1987 with 2.
  • 5 fixed thresholds have at least one qualifying day at Willesley.
34 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Willesley Days per year at Willesley with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 28 in 2000. 01020301968: 161971: 161972: 81973: 121974: 261975: 191976: 161977: 151978: 241979: 121980: 71981: 191982: 111983: 191984: 131985: 191986: 111987: 201988: 211989: 211990: 131991: 171992: 61993: 81994: 61995: 131996: 81997: 241998: 181999: 222000: 282001: 122002: 82003: 12196819741978198219861990199419982002
Days per year at Willesley with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 28 in 2000.
Days with 10 mm (0.39 in) or more of precipitation per year at Willesley
YearDaysDecade average
19681616
19711616.4
1972816.4
19731216.4
19742616.4
19751916.4
19761616.4
19771516.4
19782416.4
19791216.4
1980716.1
19811916.1
19821116.1
19831916.1
19841316.1
19851916.1
19861116.1
19872016.1
19882116.1
19892116.1
19901313.5
19911713.5
1992613.5
1993813.5
1994613.5
19951313.5
1996813.5
19972413.5
19981813.5
19992213.5
20002815
20011215
2002815
20031215
First to last qualifying date each year at Willesley For each year, a bar from the first to the last day at Willesley meeting 10 mm (0.39 in). 1968: 5 January 1968 to 4 December 19681971: 24 January 1971 to 27 December 19711972: 18 February 1972 to 1 December 19721973: 8 January 1973 to 14 September 19731974: 7 January 1974 to 29 December 19741975: 2 January 1975 to 28 November 19751976: 15 January 1976 to 28 November 19761977: 6 January 1977 to 22 December 19771978: 29 January 1978 to 26 December 19781979: 7 February 1979 to 29 November 19791980: 22 January 1980 to 28 December 19801981: 2 January 1981 to 30 December 19811982: 1 January 1982 to 31 December 19821983: 1 January 1983 to 2 December 19831984: 5 January 1984 to 15 December 19841985: 24 January 1985 to 31 December 19851986: 7 February 1986 to 2 December 19861987: 24 January 1987 to 31 December 19871988: 8 February 1988 to 28 December 19881989: 6 January 1989 to 5 December 19891990: 23 March 1990 to 30 December 19901991: 3 January 1991 to 18 December 19911992: 24 February 1992 to 21 November 19921993: 11 January 1993 to 24 November 19931994: 2 February 1994 to 2 May 19941995: 20 January 1995 to 21 November 19951996: 3 January 1996 to 9 December 19961997: 27 January 1997 to 28 December 19971998: 17 January 1998 to 30 December 19981999: 3 January 1999 to 28 December 19992000: 10 January 2000 to 29 December 20002001: 20 January 2001 to 17 November 20012002: 2 January 2002 to 22 December 20022003: 2 February 2003 to 13 December 20031968197519801985199019952000JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Willesley meeting 10 mm (0.39 in).
First to last qualifying date each year at Willesley
YearFirst dateLast date
19681968-01-051968-12-04
19711971-01-241971-12-27
19721972-02-181972-12-01
19731973-01-081973-09-14
19741974-01-071974-12-29
19751975-01-021975-11-28
19761976-01-151976-11-28
19771977-01-061977-12-22
19781978-01-291978-12-26
19791979-02-071979-11-29
19801980-01-221980-12-28
19811981-01-021981-12-30
19821982-01-011982-12-31
19831983-01-011983-12-02
19841984-01-051984-12-15
19851985-01-241985-12-31
19861986-02-071986-12-02
19871987-01-241987-12-31
19881988-02-081988-12-28
19891989-01-061989-12-05
19901990-03-231990-12-30
19911991-01-031991-12-18
19921992-02-241992-11-21
19931993-01-111993-11-24
19941994-02-021994-05-02
19951995-01-201995-11-21
19961996-01-031996-12-09
19971997-01-271997-12-28
19981998-01-171998-12-30
19991999-01-031999-12-28
20002000-01-102000-12-29
20012001-01-202001-11-17
20022002-01-022002-12-22
20032003-02-022003-12-13

Every Fixed Threshold

Fixed thresholds at Willesley
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3428200012
25 mm (0.98 in): Days with 25 mm or more rain341519748
50 mm (1.97 in): Days with 50 mm or more rain31419752
100 mm (3.94 in): Days with 100 mm or more rain7219871
200 mm (7.87 in): Days with 200 mm or more rain1119781

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1968.

Download the Data

  • Data for Willesley 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).