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Built 2026-10-18 (18 October 2026)

Williams Threshold Days by Year

4 fixed thresholds counted per year at Williams (ASN00010655): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Williams Thresholds

  • Williams: days with 10 mm (0.39 in) or more of precipitation in 85 years, most in 1926 with 34.
  • Williams: days with 25 mm (0.98 in) or more of precipitation in 77 years, most in 1945 with 8.
  • Williams: days with 50 mm (1.97 in) or more of precipitation in 17 years, most in 1945 with 2.
  • Williams: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1955 with 1.
  • 4 fixed thresholds have at least one qualifying day at Williams.
85 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Williams Days per year at Williams with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 34 in 1926. 0102030401907: 161908: 121909: 161911: 101912: 161913: 241914: 81915: 171916: 231917: 281918: 191919: 171920: 191921: 151922: 171923: 241924: 191925: 61926: 341927: 161928: 141929: 191930: 191931: 171932: 211933: 161934: 181935: 171936: 131937: 131938: 141939: 251940: 61941: 121942: 191943: 201944: 121945: 251946: 241947: 181948: 91949: 181950: 141951: 181952: 131953: 141954: 91955: 301956: 141957: 161958: 191959: 181960: 191961: 201962: 141963: 251964: 241965: 191966: 111967: 131968: 181969: 101970: 191971: 151972: 131973: 181974: 151975: 141984: 111985: 101986: 111988: 151994: 81995: 151996: 231997: 111998: 151999: 162000: 112001: 62002: 72004: 92005: 132007: 112026: 61907191719261935194419531962197119942004
Days per year at Williams with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 34 in 1926.
Days with 10 mm (0.39 in) or more of precipitation per year at Williams
YearDaysDecade average
19071614.7
19081214.7
19091614.7
19111018
19121618
19132418
1914818
19151718
19162318
19172818
19181918
19191718
19201918.3
19211518.3
19221718.3
19232418.3
19241918.3
1925618.3
19263418.3
19271618.3
19281418.3
19291918.3
19301917.3
19311717.3
19322117.3
19331617.3
19341817.3
19351717.3
19361317.3
19371317.3
19381417.3
19392517.3
1940616.3
19411216.3
19421916.3
19432016.3
19441216.3
19452516.3
19462416.3
19471816.3
1948916.3
19491816.3
19501416.5
19511816.5
19521316.5
19531416.5
1954916.5
19553016.5
19561416.5
19571616.5
19581916.5
19591816.5
19601917.3
19612017.3
19621417.3
19632517.3
19642417.3
19651917.3
19661117.3
19671317.3
19681817.3
19691017.3
19701915.7
19711515.7
19721315.7
19731815.7
19741515.7
19751415.7
19841111.8
19851011.8
19861111.8
19881511.8
1994814.7
19951514.7
19962314.7
19971114.7
19981514.7
19991614.7
2000119.5
200169.5
200279.5
200499.5
2005139.5
2007119.5
202666
First to last qualifying date each year at Williams For each year, a bar from the first to the last day at Williams meeting 10 mm (0.39 in). 1907: 17 May 1907 to 23 September 19071908: 28 March 1908 to 23 September 19081909: 27 March 1909 to 28 September 19091911: 27 April 1911 to 12 October 19111912: 6 May 1912 to 29 December 19121913: 11 April 1913 to 20 December 19131914: 18 February 1914 to 26 August 19141915: 26 February 1915 to 10 October 19151916: 29 January 1916 to 23 November 19161917: 10 February 1917 to 10 October 19171918: 26 January 1918 to 22 October 19181919: 16 April 1919 to 4 November 19191920: 13 March 1920 to 25 November 19201921: 8 May 1921 to 9 December 19211922: 24 February 1922 to 7 December 19221923: 20 January 1923 to 25 September 19231924: 15 May 1924 to 10 November 19241925: 24 January 1925 to 31 December 19251926: 10 March 1926 to 22 October 19261927: 13 March 1927 to 7 October 19271928: 20 April 1928 to 28 September 19281929: 16 February 1929 to 15 November 19291930: 8 March 1930 to 15 September 19301931: 7 April 1931 to 8 September 19311932: 28 March 1932 to 29 October 19321933: 8 January 1933 to 3 October 19331934: 9 March 1934 to 11 September 19341935: 1 February 1935 to 20 October 19351936: 11 January 1936 to 27 December 19361937: 19 April 1937 to 30 August 19371938: 14 March 1938 to 2 November 19381939: 21 January 1939 to 5 October 19391940: 13 June 1940 to 3 December 19401941: 13 April 1941 to 19 September 19411942: 14 March 1942 to 1 December 19421943: 31 January 1943 to 11 October 19431944: 18 May 1944 to 7 December 19441945: 26 March 1945 to 18 September 19451946: 19 April 1946 to 12 November 19461947: 16 April 1947 to 25 October 19471948: 5 June 1948 to 24 December 19481949: 10 May 1949 to 14 November 19491950: 6 May 1950 to 8 November 19501951: 22 February 1951 to 5 December 19511952: 28 March 1952 to 13 October 19521953: 24 April 1953 to 25 September 19531954: 23 May 1954 to 23 August 19541955: 7 February 1955 to 17 October 19551956: 5 March 1956 to 29 November 19561957: 21 January 1957 to 5 September 19571958: 13 February 1958 to 22 December 19581959: 9 February 1959 to 31 December 19591960: 1 January 1960 to 23 September 19601961: 26 January 1961 to 30 September 19611962: 14 May 1962 to 9 November 19621963: 18 February 1963 to 31 October 19631964: 1 April 1964 to 21 October 19641965: 26 March 1965 to 29 November 19651966: 3 June 1966 to 27 December 19661967: 22 April 1967 to 22 December 19671968: 3 February 1968 to 23 September 19681969: 9 April 1969 to 4 November 19691970: 7 February 1970 to 5 October 19701971: 31 January 1971 to 23 November 19711972: 20 April 1972 to 25 August 19721973: 8 January 1973 to 15 October 19731974: 4 April 1974 to 18 November 19741975: 15 April 1975 to 26 September 19751984: 8 May 1984 to 16 November 19841985: 10 April 1985 to 27 August 19851986: 14 May 1986 to 13 October 19861988: 24 March 1988 to 2 December 19881994: 24 May 1994 to 14 October 19941995: 22 May 1995 to 30 October 19951996: 22 April 1996 to 2 December 19961997: 1 April 1997 to 24 November 19971998: 10 March 1998 to 18 November 19981999: 6 May 1999 to 20 December 19992000: 7 January 2000 to 6 September 20002001: 30 May 2001 to 19 November 20012002: 17 April 2002 to 12 July 20022004: 22 May 2004 to 3 November 20042005: 31 March 2005 to 9 September 20052007: 3 January 2007 to 13 November 20072026: 28 April 2026 to 27 August 202619071919193019411952196319741999JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Williams meeting 10 mm (0.39 in).
First to last qualifying date each year at Williams
YearFirst dateLast date
19071907-05-171907-09-23
19081908-03-281908-09-23
19091909-03-271909-09-28
19111911-04-271911-10-12
19121912-05-061912-12-29
19131913-04-111913-12-20
19141914-02-181914-08-26
19151915-02-261915-10-10
19161916-01-291916-11-23
19171917-02-101917-10-10
19181918-01-261918-10-22
19191919-04-161919-11-04
19201920-03-131920-11-25
19211921-05-081921-12-09
19221922-02-241922-12-07
19231923-01-201923-09-25
19241924-05-151924-11-10
19251925-01-241925-12-31
19261926-03-101926-10-22
19271927-03-131927-10-07
19281928-04-201928-09-28
19291929-02-161929-11-15
19301930-03-081930-09-15
19311931-04-071931-09-08
19321932-03-281932-10-29
19331933-01-081933-10-03
19341934-03-091934-09-11
19351935-02-011935-10-20
19361936-01-111936-12-27
19371937-04-191937-08-30
19381938-03-141938-11-02
19391939-01-211939-10-05
19401940-06-131940-12-03
19411941-04-131941-09-19
19421942-03-141942-12-01
19431943-01-311943-10-11
19441944-05-181944-12-07
19451945-03-261945-09-18
19461946-04-191946-11-12
19471947-04-161947-10-25
19481948-06-051948-12-24
19491949-05-101949-11-14
19501950-05-061950-11-08
19511951-02-221951-12-05
19521952-03-281952-10-13
19531953-04-241953-09-25
19541954-05-231954-08-23
19551955-02-071955-10-17
19561956-03-051956-11-29
19571957-01-211957-09-05
19581958-02-131958-12-22
19591959-02-091959-12-31
19601960-01-011960-09-23
19611961-01-261961-09-30
19621962-05-141962-11-09
19631963-02-181963-10-31
19641964-04-011964-10-21
19651965-03-261965-11-29
19661966-06-031966-12-27
19671967-04-221967-12-22
19681968-02-031968-09-23
19691969-04-091969-11-04
19701970-02-071970-10-05
19711971-01-311971-11-23
19721972-04-201972-08-25
19731973-01-081973-10-15
19741974-04-041974-11-18
19751975-04-151975-09-26
19841984-05-081984-11-16
19851985-04-101985-08-27
19861986-05-141986-10-13
19881988-03-241988-12-02
19941994-05-241994-10-14
19951995-05-221995-10-30
19961996-04-221996-12-02
19971997-04-011997-11-24
19981998-03-101998-11-18
19991999-05-061999-12-20
20002000-01-072000-09-06
20012001-05-302001-11-19
20022002-04-172002-07-12
20042004-05-222004-11-03
20052005-03-312005-09-09
20072007-01-032007-11-13
20262026-04-282026-08-27

Every Fixed Threshold

Fixed thresholds at Williams
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain853419266
25 mm (0.98 in): Days with 25 mm or more rain77819452
50 mm (1.97 in): Days with 50 mm or more rain17219451
100 mm (3.94 in): Days with 100 mm or more rain1119551

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1907.

Download the Data

  • Data for Williams 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).