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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Santa Rosa Threshold Days by Year (BR048001360)

4 fixed thresholds counted per year at Santa Rosa (BR048001360): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Santa Rosa Thresholds

  • Santa Rosa: days with 10 mm (0.39 in) or more of precipitation in 30 years, most in 1964 with 44.
  • Santa Rosa: days with 25 mm (0.98 in) or more of precipitation in 24 years, most in 1964 with 17.
  • Santa Rosa: days with 50 mm (1.97 in) or more of precipitation in 18 years, most in 1964 with 5.
  • Santa Rosa: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1965 with 1.
  • 4 fixed thresholds have at least one qualifying day at Santa Rosa.
30 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Santa Rosa Days per year at Santa Rosa with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 44 in 1964. 02040601944: 141946: 71947: 161950: 111951: 71952: 111953: 51954: 101955: 31956: 71957: 91958: 51959: 31960: 211961: 41962: 71963: 141964: 441965: 151966: 221967: 261968: 251969: 351972: 141975: 231976: 131977: 131979: 101980: 41981: 91944195019531956195919621965196819751979
Days per year at Santa Rosa with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 44 in 1964.
Days with 10 mm (0.39 in) or more of precipitation per year at Santa Rosa
YearDaysDecade average
19441412.3
1946712.3
19471612.3
1950117.1
195177.1
1952117.1
195357.1
1954107.1
195537.1
195677.1
195797.1
195857.1
195937.1
19602121.3
1961421.3
1962721.3
19631421.3
19644421.3
19651521.3
19662221.3
19672621.3
19682521.3
19693521.3
19721414.6
19752314.6
19761314.6
19771314.6
19791014.6
198046.5
198196.5
First to last qualifying date each year at Santa Rosa For each year, a bar from the first to the last day at Santa Rosa meeting 10 mm (0.39 in). 1944: 19 January 1944 to 26 December 19441946: 13 March 1946 to 17 December 19461947: 21 January 1947 to 18 November 19471950: 17 January 1950 to 21 December 19501951: 1 March 1951 to 18 December 19511952: 17 March 1952 to 25 December 19521953: 17 February 1953 to 9 May 19531954: 1 April 1954 to 6 December 19541955: 18 January 1955 to 12 November 19551956: 1 January 1956 to 31 December 19561957: 8 January 1957 to 23 December 19571958: 28 January 1958 to 31 December 19581959: 19 January 1959 to 24 August 19591960: 1 January 1960 to 7 July 19601961: 21 January 1961 to 9 December 19611962: 5 January 1962 to 26 December 19621963: 5 January 1963 to 26 December 19631964: 4 January 1964 to 30 November 19641965: 11 March 1965 to 20 November 19651966: 3 January 1966 to 25 December 19661967: 14 February 1967 to 31 December 19671968: 1 February 1968 to 30 November 19681969: 25 January 1969 to 28 December 19691972: 8 January 1972 to 16 November 19721975: 22 January 1975 to 7 December 19751976: 15 January 1976 to 30 November 19761977: 13 January 1977 to 29 November 19771979: 15 January 1979 to 21 December 19791980: 10 March 1980 to 17 December 19801981: 16 January 1981 to 6 December 198119441951195519591963196719751980JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Santa Rosa meeting 10 mm (0.39 in).
First to last qualifying date each year at Santa Rosa
YearFirst dateLast date
19441944-01-191944-12-26
19461946-03-131946-12-17
19471947-01-211947-11-18
19501950-01-171950-12-21
19511951-03-011951-12-18
19521952-03-171952-12-25
19531953-02-171953-05-09
19541954-04-011954-12-06
19551955-01-181955-11-12
19561956-01-011956-12-31
19571957-01-081957-12-23
19581958-01-281958-12-31
19591959-01-191959-08-24
19601960-01-011960-07-07
19611961-01-211961-12-09
19621962-01-051962-12-26
19631963-01-051963-12-26
19641964-01-041964-11-30
19651965-03-111965-11-20
19661966-01-031966-12-25
19671967-02-141967-12-31
19681968-02-011968-11-30
19691969-01-251969-12-28
19721972-01-081972-11-16
19751975-01-221975-12-07
19761976-01-151976-11-30
19771977-01-131977-11-29
19791979-01-151979-12-21
19801980-03-101980-12-17
19811981-01-161981-12-06

Every Fixed Threshold

Fixed thresholds at Santa Rosa
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain304419649
25 mm (0.98 in): Days with 25 mm or more rain241719643
50 mm (1.97 in): Days with 50 mm or more rain18519641
100 mm (3.94 in): Days with 100 mm or more rain1119651

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1944.

Download the Data

  • Data for Santa Rosa 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).