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Built 2026-10-18 (18 October 2026)

Wilroy Threshold Days by Year

3 fixed thresholds counted per year at Wilroy (ASN00008155): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wilroy Thresholds

  • Wilroy: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 1917 with 18.
  • Wilroy: days with 25 mm (0.98 in) or more of precipitation in 27 years, most in 1917 with 7.
  • Wilroy: days with 50 mm (1.97 in) or more of precipitation in 8 years, most in 1965 with 2.
  • 3 fixed thresholds have at least one qualifying day at Wilroy.
35 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Wilroy Days per year at Wilroy with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 18 in 1917. 051015201914: 51915: 121916: 81917: 181918: 131919: 131920: 81921: 131922: 61923: 101924: 81925: 111926: 141927: 111928: 91929: 121930: 81931: 91932: 71933: 91934: 131935: 101936: 41937: 81938: 11939: 121940: 71951: 121952: 31959: 141962: 91963: 141964: 41965: 81966: 10191419181922192619301934193819521964
Days per year at Wilroy with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 18 in 1917.
Days with 10 mm (0.39 in) or more of precipitation per year at Wilroy
YearDaysDecade average
1914511.5
19151211.5
1916811.5
19171811.5
19181311.5
19191311.5
1920810.2
19211310.2
1922610.2
19231010.2
1924810.2
19251110.2
19261410.2
19271110.2
1928910.2
19291210.2
193088.1
193198.1
193278.1
193398.1
1934138.1
1935108.1
193648.1
193788.1
193818.1
1939128.1
194077
1951129.7
195239.7
1959149.7
196299
1963149
196449
196589
1966109
First to last qualifying date each year at Wilroy For each year, a bar from the first to the last day at Wilroy meeting 10 mm (0.39 in). 1914: 15 January 1914 to 12 November 19141915: 21 February 1915 to 7 August 19151916: 20 January 1916 to 5 October 19161917: 22 January 1917 to 25 December 19171918: 10 February 1918 to 16 September 19181919: 17 April 1919 to 10 December 19191920: 8 May 1920 to 14 August 19201921: 14 February 1921 to 23 September 19211922: 26 February 1922 to 24 September 19221923: 3 March 1923 to 11 July 19231924: 12 May 1924 to 18 October 19241925: 15 January 1925 to 31 December 19251926: 16 March 1926 to 19 November 19261927: 1 March 1927 to 8 August 19271928: 29 March 1928 to 5 December 19281929: 14 February 1929 to 24 November 19291930: 27 March 1930 to 6 September 19301931: 27 February 1931 to 29 December 19311932: 13 April 1932 to 27 August 19321933: 8 March 1933 to 30 August 19331934: 11 January 1934 to 6 August 19341935: 6 January 1935 to 3 September 19351936: 22 May 1936 to 2 August 19361937: 19 April 1937 to 27 August 19371938: 19 April 1938 to 19 April 19381939: 13 February 1939 to 11 November 19391940: 14 May 1940 to 12 October 19401951: 4 February 1951 to 25 July 19511952: 18 February 1952 to 10 July 19521959: 21 January 1959 to 26 November 19591962: 16 February 1962 to 1 October 19621963: 29 January 1963 to 20 August 19631964: 27 April 1964 to 21 July 19641965: 15 March 1965 to 27 November 19651966: 23 March 1966 to 14 September 19661914191919241929193419391962JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Wilroy meeting 10 mm (0.39 in).
First to last qualifying date each year at Wilroy
YearFirst dateLast date
19141914-01-151914-11-12
19151915-02-211915-08-07
19161916-01-201916-10-05
19171917-01-221917-12-25
19181918-02-101918-09-16
19191919-04-171919-12-10
19201920-05-081920-08-14
19211921-02-141921-09-23
19221922-02-261922-09-24
19231923-03-031923-07-11
19241924-05-121924-10-18
19251925-01-151925-12-31
19261926-03-161926-11-19
19271927-03-011927-08-08
19281928-03-291928-12-05
19291929-02-141929-11-24
19301930-03-271930-09-06
19311931-02-271931-12-29
19321932-04-131932-08-27
19331933-03-081933-08-30
19341934-01-111934-08-06
19351935-01-061935-09-03
19361936-05-221936-08-02
19371937-04-191937-08-27
19381938-04-191938-04-19
19391939-02-131939-11-11
19401940-05-141940-10-12
19511951-02-041951-07-25
19521952-02-181952-07-10
19591959-01-211959-11-26
19621962-02-161962-10-01
19631963-01-291963-08-20
19641964-04-271964-07-21
19651965-03-151965-11-27
19661966-03-231966-09-14

Every Fixed Threshold

Fixed thresholds at Wilroy
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3518191710
25 mm (0.98 in): Days with 25 mm or more rain27719171
50 mm (1.97 in): Days with 50 mm or more rain8219651

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1914.

Download the Data

  • Data for Wilroy 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).