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Built 2026-10-19 (19 October 2026)

Central San Francisco Threshold Days by Year (RQC00662316)

5 fixed thresholds counted per year at Central San Francisco (RQC00662316): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Central San Francisco Thresholds

  • Central San Francisco: days with 10 mm (0.39 in) or more of precipitation in 41 years, most in 1960 with 38.
  • Central San Francisco: days with 25 mm (0.98 in) or more of precipitation in 41 years, most in 1960 with 19.
  • Central San Francisco: days with 50 mm (1.97 in) or more of precipitation in 35 years, most in 1956 with 6.
  • Central San Francisco: days with 100 mm (3.94 in) or more of precipitation in 12 years, most in 1979 with 4.
  • 5 fixed thresholds have at least one qualifying day at Central San Francisco.
41 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Central San Francisco Days per year at Central San Francisco with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 38 in 1960. 0102030401955: 251956: 241957: 161958: 301959: 241960: 381961: 261962: 251963: 231964: 181965: 161966: 231967: 161968: 241969: 301970: 281971: 181972: 191973: 151974: 281975: 181976: 151977: 201978: 161979: 291980: 181981: 271982: 221983: 221984: 251985: 211986: 191987: 281988: 191989: 161990: 271991: 151992: 251993: 171994: 191995: 21195519601965197019751980198519901995
Days per year at Central San Francisco with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 38 in 1960.
Days with 10 mm (0.39 in) or more of precipitation per year at Central San Francisco
YearDaysDecade average
19552523.8
19562423.8
19571623.8
19583023.8
19592423.8
19603823.9
19612623.9
19622523.9
19632323.9
19641823.9
19651623.9
19662323.9
19671623.9
19682423.9
19693023.9
19702820.6
19711820.6
19721920.6
19731520.6
19742820.6
19751820.6
19761520.6
19772020.6
19781620.6
19792920.6
19801821.7
19812721.7
19822221.7
19832221.7
19842521.7
19852121.7
19861921.7
19872821.7
19881921.7
19891621.7
19902720.7
19911520.7
19922520.7
19931720.7
19941920.7
19952120.7
First to last qualifying date each year at Central San Francisco For each year, a bar from the first to the last day at Central San Francisco meeting 10 mm (0.39 in). 1955: 9 April 1955 to 7 December 19551956: 3 February 1956 to 30 December 19561957: 18 March 1957 to 11 December 19571958: 11 January 1958 to 22 November 19581959: 3 March 1959 to 26 December 19591960: 14 January 1960 to 3 December 19601961: 9 January 1961 to 28 November 19611962: 5 February 1962 to 12 December 19621963: 3 January 1963 to 22 November 19631964: 12 January 1964 to 28 December 19641965: 30 April 1965 to 24 December 19651966: 11 January 1966 to 24 November 19661967: 25 March 1967 to 24 November 19671968: 19 January 1968 to 16 December 19681969: 5 January 1969 to 22 December 19691970: 4 May 1970 to 23 November 19701971: 5 February 1971 to 27 November 19711972: 16 January 1972 to 28 November 19721973: 18 January 1973 to 13 November 19731974: 23 January 1974 to 29 December 19741975: 28 March 1975 to 11 December 19751976: 2 February 1976 to 31 October 19761977: 23 February 1977 to 26 November 19771978: 29 January 1978 to 15 November 19781979: 19 January 1979 to 20 December 19791980: 7 January 1980 to 30 December 19801981: 14 February 1981 to 12 December 19811982: 23 February 1982 to 20 December 19821983: 13 March 1983 to 6 November 19831984: 13 January 1984 to 27 November 19841985: 18 March 1985 to 14 November 19851986: 30 January 1986 to 17 December 19861987: 6 January 1987 to 31 December 19871988: 15 February 1988 to 23 November 19881989: 12 February 1989 to 13 November 19891990: 20 April 1990 to 20 November 19901991: 12 February 1991 to 17 November 19911992: 6 January 1992 to 2 December 19921993: 1 January 1993 to 21 November 19931994: 23 January 1994 to 23 December 19941995: 22 February 1995 to 20 December 19951955196119671973197919851991JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Central San Francisco meeting 10 mm (0.39 in).
First to last qualifying date each year at Central San Francisco
YearFirst dateLast date
19551955-04-091955-12-07
19561956-02-031956-12-30
19571957-03-181957-12-11
19581958-01-111958-11-22
19591959-03-031959-12-26
19601960-01-141960-12-03
19611961-01-091961-11-28
19621962-02-051962-12-12
19631963-01-031963-11-22
19641964-01-121964-12-28
19651965-04-301965-12-24
19661966-01-111966-11-24
19671967-03-251967-11-24
19681968-01-191968-12-16
19691969-01-051969-12-22
19701970-05-041970-11-23
19711971-02-051971-11-27
19721972-01-161972-11-28
19731973-01-181973-11-13
19741974-01-231974-12-29
19751975-03-281975-12-11
19761976-02-021976-10-31
19771977-02-231977-11-26
19781978-01-291978-11-15
19791979-01-191979-12-20
19801980-01-071980-12-30
19811981-02-141981-12-12
19821982-02-231982-12-20
19831983-03-131983-11-06
19841984-01-131984-11-27
19851985-03-181985-11-14
19861986-01-301986-12-17
19871987-01-061987-12-31
19881988-02-151988-11-23
19891989-02-121989-11-13
19901990-04-201990-11-20
19911991-02-121991-11-17
19921992-01-061992-12-02
19931993-01-011993-11-21
19941994-01-231994-12-23
19951995-02-221995-12-20

Every Fixed Threshold

Fixed thresholds at Central San Francisco
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4138196021
25 mm (0.98 in): Days with 25 mm or more rain411919605
50 mm (1.97 in): Days with 50 mm or more rain35619562
100 mm (3.94 in): Days with 100 mm or more rain12419791
200 mm (7.87 in): Days with 200 mm or more rain2119821

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1955.

Download the Data

  • Data for Central San Francisco 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).