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

Parkfield Threshold Days by Year (USC00046703)

5 fixed thresholds counted per year at Parkfield (USC00046703): 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 30 years, most in 1958 with 21.
  • Parkfield: days with 25 mm (0.98 in) or more of precipitation in 29 years, most in 1969 with 11.
  • Parkfield: days with 50 mm (1.97 in) or more of precipitation in 13 years, most in 1958 with 2.
  • Parkfield: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1966 with 1.
  • 5 fixed thresholds have at least one qualifying day at Parkfield.
30 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 21 in 1958. 01020301943: 101944: 151945: 131946: 121947: 31948: 91949: 111950: 111951: 121952: 151953: 41954: 141955: 201956: 51957: 181958: 211959: 71960: 121961: 51962: 161963: 141964: 101965: 191966: 51967: 181969: 181970: 131971: 61972: 61974: 81943194619491952195519581961196419671971
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 21 in 1958.
Days with 10 mm (0.39 in) or more of precipitation per year at Parkfield
YearDaysDecade average
19431010.4
19441510.4
19451310.4
19461210.4
1947310.4
1948910.4
19491110.4
19501112.7
19511212.7
19521512.7
1953412.7
19541412.7
19552012.7
1956512.7
19571812.7
19582112.7
1959712.7
19601213
1961513
19621613
19631413
19641013
19651913
1966513
19671813
19691813
1970138.3
197168.3
197268.3
197488.3
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). 1943: 21 February 1943 to 30 December 19431944: 24 January 1944 to 12 November 19441945: 31 January 1945 to 25 December 19451946: 3 February 1946 to 27 December 19461947: 28 January 1947 to 28 March 19471948: 5 February 1948 to 27 December 19481949: 19 January 1949 to 18 December 19491950: 9 January 1950 to 4 December 19501951: 10 January 1951 to 30 December 19511952: 7 January 1952 to 31 December 19521953: 8 January 1953 to 14 November 19531954: 20 January 1954 to 10 December 19541955: 2 January 1955 to 31 December 19551956: 25 January 1956 to 5 October 19561957: 5 January 1957 to 17 December 19571958: 24 January 1958 to 7 September 19581959: 6 January 1959 to 18 September 19591960: 10 January 1960 to 2 December 19601961: 26 January 1961 to 2 December 19611962: 20 January 1962 to 17 December 19621963: 30 January 1963 to 20 November 19631964: 21 January 1964 to 28 December 19641965: 4 January 1965 to 30 December 19651966: 30 January 1966 to 7 December 19661967: 22 January 1967 to 5 December 19671969: 14 January 1969 to 20 December 19691970: 9 January 1970 to 21 December 19701971: 12 January 1971 to 27 December 19711972: 15 October 1972 to 16 November 19721974: 4 January 1974 to 4 December 197419431947195119551959196319671972JanFebMarAprMayJunJulAugSepOctNovDec
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
19431943-02-211943-12-30
19441944-01-241944-11-12
19451945-01-311945-12-25
19461946-02-031946-12-27
19471947-01-281947-03-28
19481948-02-051948-12-27
19491949-01-191949-12-18
19501950-01-091950-12-04
19511951-01-101951-12-30
19521952-01-071952-12-31
19531953-01-081953-11-14
19541954-01-201954-12-10
19551955-01-021955-12-31
19561956-01-251956-10-05
19571957-01-051957-12-17
19581958-01-241958-09-07
19591959-01-061959-09-18
19601960-01-101960-12-02
19611961-01-261961-12-02
19621962-01-201962-12-17
19631963-01-301963-11-20
19641964-01-211964-12-28
19651965-01-041965-12-30
19661966-01-301966-12-07
19671967-01-221967-12-05
19691969-01-141969-12-20
19701970-01-091970-12-21
19711971-01-121971-12-27
19721972-10-151972-11-16
19741974-01-041974-12-04

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 rain302119588
25 mm (0.98 in): Days with 25 mm or more rain291119694
50 mm (1.97 in): Days with 50 mm or more rain13219582
100 mm (3.94 in): Days with 100 mm or more rain1119661
10 cm (3.9 in): Days with 10 cm or more snowfall1119741

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1943.

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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).