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Built 2026-10-18 (18 October 2026)

Cowalla Threshold Days by Year

4 fixed thresholds counted per year at Cowalla (ASN00009013): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Cowalla Thresholds

  • Cowalla: days with 10 mm (0.39 in) or more of precipitation in 60 years, most in 1963 with 39.
  • Cowalla: days with 25 mm (0.98 in) or more of precipitation in 59 years, most in 1917 with 10.
  • Cowalla: days with 50 mm (1.97 in) or more of precipitation in 20 years, most in 1917 with 2.
  • Cowalla: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1945 with 1.
  • 4 fixed thresholds have at least one qualifying day at Cowalla.
60 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Cowalla Days per year at Cowalla with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 39 in 1963. 0102030401909: 271910: 371911: 181912: 241913: 271914: 101915: 321916: 251917: 341918: 201919: 171920: 271921: 281922: 191923: 311924: 201925: 201926: 331927: 221928: 261929: 241930: 261931: 311932: 291933: 221934: 221935: 171936: 171937: 171938: 141939: 341940: 161941: 181942: 211943: 191944: 221945: 291946: 381947: 241948: 191949: 171950: 211951: 221952: 191953: 261954: 141955: 331956: 301957: 211958: 221959: 171960: 211961: 211962: 211963: 391964: 261965: 301966: 241967: 181968: 161909191519211927193319391945195119571963
Days per year at Cowalla with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 39 in 1963.
Days with 10 mm (0.39 in) or more of precipitation per year at Cowalla
YearDaysDecade average
19092727
19103724.4
19111824.4
19122424.4
19132724.4
19141024.4
19153224.4
19162524.4
19173424.4
19182024.4
19191724.4
19202725
19212825
19221925
19233125
19242025
19252025
19263325
19272225
19282625
19292425
19302622.9
19313122.9
19322922.9
19332222.9
19342222.9
19351722.9
19361722.9
19371722.9
19381422.9
19393422.9
19401622.3
19411822.3
19422122.3
19431922.3
19442222.3
19452922.3
19463822.3
19472422.3
19481922.3
19491722.3
19502122.5
19512222.5
19521922.5
19532622.5
19541422.5
19553322.5
19563022.5
19572122.5
19582222.5
19591722.5
19602124
19612124
19622124
19633924
19642624
19653024
19662424
19671824
19681624
First to last qualifying date each year at Cowalla For each year, a bar from the first to the last day at Cowalla meeting 10 mm (0.39 in). 1909: 9 April 1909 to 9 October 19091910: 14 April 1910 to 16 October 19101911: 23 April 1911 to 12 October 19111912: 14 February 1912 to 28 December 19121913: 1 May 1913 to 20 December 19131914: 18 February 1914 to 26 August 19141915: 21 February 1915 to 20 October 19151916: 20 January 1916 to 24 November 19161917: 19 March 1917 to 19 December 19171918: 28 February 1918 to 28 October 19181919: 18 April 1919 to 5 October 19191920: 11 May 1920 to 8 September 19201921: 19 February 1921 to 12 October 19211922: 16 April 1922 to 9 December 19221923: 13 February 1923 to 16 December 19231924: 12 May 1924 to 27 October 19241925: 24 January 1925 to 12 October 19251926: 16 April 1926 to 25 November 19261927: 13 March 1927 to 13 October 19271928: 20 April 1928 to 21 October 19281929: 2 May 1929 to 4 September 19291930: 15 April 1930 to 13 December 19301931: 24 April 1931 to 6 October 19311932: 28 March 1932 to 29 October 19321933: 9 April 1933 to 7 October 19331934: 8 March 1934 to 24 September 19341935: 6 January 1935 to 22 October 19351936: 4 March 1936 to 1 October 19361937: 19 April 1937 to 17 September 19371938: 20 April 1938 to 2 November 19381939: 19 January 1939 to 1 November 19391940: 23 January 1940 to 3 December 19401941: 31 March 1941 to 19 September 19411942: 13 March 1942 to 27 October 19421943: 13 February 1943 to 11 October 19431944: 18 May 1944 to 24 September 19441945: 16 May 1945 to 13 November 19451946: 19 April 1946 to 13 November 19461947: 6 March 1947 to 25 October 19471948: 19 March 1948 to 15 November 19481949: 29 April 1949 to 1 September 19491950: 5 May 1950 to 10 October 19501951: 17 April 1951 to 5 December 19511952: 29 March 1952 to 14 October 19521953: 2 February 1953 to 16 November 19531954: 23 April 1954 to 29 October 19541955: 6 February 1955 to 28 October 19551956: 4 March 1956 to 29 November 19561957: 19 March 1957 to 5 September 19571958: 22 January 1958 to 14 October 19581959: 31 May 1959 to 22 November 19591960: 1 January 1960 to 12 September 19601961: 28 March 1961 to 16 December 19611962: 30 January 1962 to 9 November 19621963: 29 January 1963 to 31 October 19631964: 24 February 1964 to 19 December 19641965: 1 May 1965 to 8 November 19651966: 12 February 1966 to 9 October 19661967: 22 April 1967 to 9 December 19671968: 27 January 1968 to 28 September 196819091917192519331941194919571965JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Cowalla meeting 10 mm (0.39 in).
First to last qualifying date each year at Cowalla
YearFirst dateLast date
19091909-04-091909-10-09
19101910-04-141910-10-16
19111911-04-231911-10-12
19121912-02-141912-12-28
19131913-05-011913-12-20
19141914-02-181914-08-26
19151915-02-211915-10-20
19161916-01-201916-11-24
19171917-03-191917-12-19
19181918-02-281918-10-28
19191919-04-181919-10-05
19201920-05-111920-09-08
19211921-02-191921-10-12
19221922-04-161922-12-09
19231923-02-131923-12-16
19241924-05-121924-10-27
19251925-01-241925-10-12
19261926-04-161926-11-25
19271927-03-131927-10-13
19281928-04-201928-10-21
19291929-05-021929-09-04
19301930-04-151930-12-13
19311931-04-241931-10-06
19321932-03-281932-10-29
19331933-04-091933-10-07
19341934-03-081934-09-24
19351935-01-061935-10-22
19361936-03-041936-10-01
19371937-04-191937-09-17
19381938-04-201938-11-02
19391939-01-191939-11-01
19401940-01-231940-12-03
19411941-03-311941-09-19
19421942-03-131942-10-27
19431943-02-131943-10-11
19441944-05-181944-09-24
19451945-05-161945-11-13
19461946-04-191946-11-13
19471947-03-061947-10-25
19481948-03-191948-11-15
19491949-04-291949-09-01
19501950-05-051950-10-10
19511951-04-171951-12-05
19521952-03-291952-10-14
19531953-02-021953-11-16
19541954-04-231954-10-29
19551955-02-061955-10-28
19561956-03-041956-11-29
19571957-03-191957-09-05
19581958-01-221958-10-14
19591959-05-311959-11-22
19601960-01-011960-09-12
19611961-03-281961-12-16
19621962-01-301962-11-09
19631963-01-291963-10-31
19641964-02-241964-12-19
19651965-05-011965-11-08
19661966-02-121966-10-09
19671967-04-221967-12-09
19681968-01-271968-09-28

Every Fixed Threshold

Fixed thresholds at Cowalla
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain6039196316
25 mm (0.98 in): Days with 25 mm or more rain591019174
50 mm (1.97 in): Days with 50 mm or more rain20219171
100 mm (3.94 in): Days with 100 mm or more rain1119451

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1909.

Download the Data

  • Data for Cowalla 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).