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Built 2026-10-18 (18 October 2026)

Parkfield Threshold Days by Year

4 fixed thresholds counted per year at Parkfield (ASN00009634): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Parkfield Thresholds

  • Parkfield: days with 10 mm (0.39 in) or more of precipitation in 57 years, most in 1917 with 47.
  • Parkfield: days with 25 mm (0.98 in) or more of precipitation in 57 years, most in 1921 with 13.
  • Parkfield: days with 50 mm (1.97 in) or more of precipitation in 27 years, most in 1947 with 4.
  • Parkfield: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1982 with 1.
  • 4 fixed thresholds have at least one qualifying day at Parkfield.
57 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Parkfield Days per year at Parkfield with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 47 in 1917. 02040601914: 161915: 351916: 251917: 471918: 351919: 251920: 311921: 391922: 361923: 331947: 261948: 221949: 211950: 201964: 391965: 311966: 351967: 351968: 221969: 211970: 321971: 201973: 381974: 351975: 261976: 251977: 191978: 271979: 221980: 261981: 261982: 261983: 271984: 221986: 231987: 151988: 331989: 191990: 241991: 291992: 281993: 231994: 201995: 281996: 281997: 281998: 241999: 262000: 262001: 162002: 242003: 242004: 262005: 272007: 222008: 222009: 251914192019491968197519811988199420002007
Days per year at Parkfield with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 47 in 1917.
Days with 10 mm (0.39 in) or more of precipitation per year at Parkfield
YearDaysDecade average
19141630.5
19153530.5
19162530.5
19174730.5
19183530.5
19192530.5
19203134.8
19213934.8
19223634.8
19233334.8
19472623
19482223
19492123
19502020
19643930.5
19653130.5
19663530.5
19673530.5
19682230.5
19692130.5
19703227.1
19712027.1
19733827.1
19743527.1
19752627.1
19762527.1
19771927.1
19782727.1
19792227.1
19802624.1
19812624.1
19822624.1
19832724.1
19842224.1
19862324.1
19871524.1
19883324.1
19891924.1
19902425.8
19912925.8
19922825.8
19932325.8
19942025.8
19952825.8
19962825.8
19972825.8
19982425.8
19992625.8
20002623.6
20011623.6
20022423.6
20032423.6
20042623.6
20052723.6
20072223.6
20082223.6
20092523.6
First to last qualifying date each year at Parkfield For each year, a bar from the first to the last day at Parkfield meeting 10 mm (0.39 in). 1914: 16 February 1914 to 22 November 19141915: 21 February 1915 to 20 October 19151916: 16 April 1916 to 23 November 19161917: 10 February 1917 to 19 December 19171918: 20 January 1918 to 28 October 19181919: 17 January 1919 to 15 October 19191920: 29 March 1920 to 10 October 19201921: 19 February 1921 to 4 November 19211922: 23 February 1922 to 7 December 19221923: 20 January 1923 to 8 October 19231947: 16 April 1947 to 25 October 19471948: 29 March 1948 to 24 December 19481949: 27 April 1949 to 20 October 19491950: 5 May 1950 to 3 October 19501964: 7 May 1964 to 19 December 19641965: 26 March 1965 to 1 December 19651966: 2 January 1966 to 27 December 19661967: 18 February 1967 to 24 December 19671968: 27 January 1968 to 15 October 19681969: 13 March 1969 to 3 November 19691970: 5 February 1970 to 6 October 19701971: 7 January 1971 to 23 November 19711973: 10 January 1973 to 31 October 19731974: 4 April 1974 to 14 December 19741975: 1 April 1975 to 26 September 19751976: 6 January 1976 to 12 November 19761977: 16 May 1977 to 8 October 19771978: 2 May 1978 to 22 December 19781979: 19 April 1979 to 13 November 19791980: 11 February 1980 to 31 December 19801981: 6 March 1981 to 26 November 19811982: 21 January 1982 to 4 October 19821983: 6 February 1983 to 7 November 19831984: 26 February 1984 to 28 December 19841986: 27 February 1986 to 12 October 19861987: 8 April 1987 to 29 November 19871988: 21 April 1988 to 29 September 19881989: 26 February 1989 to 18 October 19891990: 26 March 1990 to 29 October 19901991: 20 May 1991 to 25 December 19911992: 9 February 1992 to 9 December 19921993: 19 March 1993 to 9 November 19931994: 12 May 1994 to 30 September 19941995: 17 April 1995 to 31 October 19951996: 8 May 1996 to 12 December 19961997: 24 February 1997 to 9 October 19971998: 9 March 1998 to 22 September 19981999: 17 April 1999 to 14 October 19992000: 15 January 2000 to 8 November 20002001: 6 May 2001 to 4 December 20012002: 16 April 2002 to 1 November 20022003: 17 February 2003 to 18 December 20032004: 5 January 2004 to 27 November 20042005: 31 March 2005 to 11 December 20052007: 3 January 2007 to 16 December 20072008: 1 April 2008 to 22 October 20082009: 21 May 2009 to 18 November 200919141922196619751983199220002009JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Parkfield meeting 10 mm (0.39 in).
First to last qualifying date each year at Parkfield
YearFirst dateLast date
19141914-02-161914-11-22
19151915-02-211915-10-20
19161916-04-161916-11-23
19171917-02-101917-12-19
19181918-01-201918-10-28
19191919-01-171919-10-15
19201920-03-291920-10-10
19211921-02-191921-11-04
19221922-02-231922-12-07
19231923-01-201923-10-08
19471947-04-161947-10-25
19481948-03-291948-12-24
19491949-04-271949-10-20
19501950-05-051950-10-03
19641964-05-071964-12-19
19651965-03-261965-12-01
19661966-01-021966-12-27
19671967-02-181967-12-24
19681968-01-271968-10-15
19691969-03-131969-11-03
19701970-02-051970-10-06
19711971-01-071971-11-23
19731973-01-101973-10-31
19741974-04-041974-12-14
19751975-04-011975-09-26
19761976-01-061976-11-12
19771977-05-161977-10-08
19781978-05-021978-12-22
19791979-04-191979-11-13
19801980-02-111980-12-31
19811981-03-061981-11-26
19821982-01-211982-10-04
19831983-02-061983-11-07
19841984-02-261984-12-28
19861986-02-271986-10-12
19871987-04-081987-11-29
19881988-04-211988-09-29
19891989-02-261989-10-18
19901990-03-261990-10-29
19911991-05-201991-12-25
19921992-02-091992-12-09
19931993-03-191993-11-09
19941994-05-121994-09-30
19951995-04-171995-10-31
19961996-05-081996-12-12
19971997-02-241997-10-09
19981998-03-091998-09-22
19991999-04-171999-10-14
20002000-01-152000-11-08
20012001-05-062001-12-04
20022002-04-162002-11-01
20032003-02-172003-12-18
20042004-01-052004-11-27
20052005-03-312005-12-11
20072007-01-032007-12-16
20082008-04-012008-10-22
20092009-05-212009-11-18

Every Fixed Threshold

Fixed thresholds at Parkfield
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain5747191725
25 mm (0.98 in): Days with 25 mm or more rain571319215
50 mm (1.97 in): Days with 50 mm or more rain27419471
100 mm (3.94 in): Days with 100 mm or more rain1119821

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 Parkfield 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).