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Built 2026-10-19 (19 October 2026)

Chatsworth Threshold Days by Year (USC00091856)

5 fixed thresholds counted per year at Chatsworth (USC00091856): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chatsworth Thresholds

  • Chatsworth: days with 10 mm (0.39 in) or more of precipitation in 38 years, most in 1946 with 59.
  • Chatsworth: days with 25 mm (0.98 in) or more of precipitation in 38 years, most in 1957 with 23.
  • Chatsworth: days with 50 mm (1.97 in) or more of precipitation in 37 years, most in 1957 with 8.
  • Chatsworth: days with 100 mm (3.94 in) or more of precipitation in 4 years, most in 1954 with 2.
  • 5 fixed thresholds have at least one qualifying day at Chatsworth.
38 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Chatsworth Days per year at Chatsworth with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 59 in 1946. 02040601939: 441941: 321942: 501943: 461944: 401945: 491946: 591947: 431948: 551949: 501950: 481951: 431952: 401953: 441954: 461955: 371956: 501957: 511958: 371960: 361961: 421962: 441963: 441964: 521965: 441966: 481967: 581968: 441969: 471970: 391971: 501972: 511973: 481974: 441975: 521976: 501977: 481978: 421939194419481952195619611965196919731977
Days per year at Chatsworth with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 59 in 1946.
Days with 10 mm (0.39 in) or more of precipitation per year at Chatsworth
YearDaysDecade average
19394444
19413247.1
19425047.1
19434647.1
19444047.1
19454947.1
19465947.1
19474347.1
19485547.1
19495047.1
19504844
19514344
19524044
19534444
19544644
19553744
19565044
19575144
19583744
19603645.9
19614245.9
19624445.9
19634445.9
19645245.9
19654445.9
19664845.9
19675845.9
19684445.9
19694745.9
19703947.1
19715047.1
19725147.1
19734847.1
19744447.1
19755247.1
19765047.1
19774847.1
19784247.1
First to last qualifying date each year at Chatsworth For each year, a bar from the first to the last day at Chatsworth meeting 10 mm (0.39 in). 1939: 5 January 1939 to 27 December 19391941: 2 January 1941 to 26 December 19411942: 1 January 1942 to 30 December 19421943: 8 January 1943 to 29 December 19431944: 3 January 1944 to 30 December 19441945: 1 January 1945 to 31 December 19451946: 6 January 1946 to 30 December 19461947: 1 January 1947 to 16 December 19471948: 2 January 1948 to 30 December 19481949: 4 January 1949 to 23 December 19491950: 7 January 1950 to 29 December 19501951: 4 January 1951 to 26 December 19511952: 10 January 1952 to 31 December 19521953: 8 January 1953 to 29 December 19531954: 11 January 1954 to 30 December 19541955: 19 January 1955 to 26 November 19551956: 19 January 1956 to 24 December 19561957: 5 January 1957 to 29 December 19571958: 14 January 1958 to 29 December 19581960: 6 February 1960 to 21 December 19601961: 1 January 1961 to 28 December 19611962: 1 January 1962 to 29 December 19621963: 12 January 1963 to 23 December 19631964: 1 January 1964 to 27 December 19641965: 10 January 1965 to 13 December 19651966: 3 January 1966 to 29 December 19661967: 8 January 1967 to 28 December 19671968: 4 January 1968 to 28 December 19681969: 19 January 1969 to 31 December 19691970: 26 January 1970 to 24 December 19701971: 1 January 1971 to 20 December 19711972: 2 January 1972 to 31 December 19721973: 8 January 1973 to 31 December 19731974: 1 January 1974 to 28 December 19741975: 4 January 1975 to 31 December 19751976: 3 January 1976 to 31 December 19761977: 7 January 1977 to 25 December 19771978: 8 January 1978 to 31 December 197819391945195019551961196619711976JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Chatsworth meeting 10 mm (0.39 in).
First to last qualifying date each year at Chatsworth
YearFirst dateLast date
19391939-01-051939-12-27
19411941-01-021941-12-26
19421942-01-011942-12-30
19431943-01-081943-12-29
19441944-01-031944-12-30
19451945-01-011945-12-31
19461946-01-061946-12-30
19471947-01-011947-12-16
19481948-01-021948-12-30
19491949-01-041949-12-23
19501950-01-071950-12-29
19511951-01-041951-12-26
19521952-01-101952-12-31
19531953-01-081953-12-29
19541954-01-111954-12-30
19551955-01-191955-11-26
19561956-01-191956-12-24
19571957-01-051957-12-29
19581958-01-141958-12-29
19601960-02-061960-12-21
19611961-01-011961-12-28
19621962-01-011962-12-29
19631963-01-121963-12-23
19641964-01-011964-12-27
19651965-01-101965-12-13
19661966-01-031966-12-29
19671967-01-081967-12-28
19681968-01-041968-12-28
19691969-01-191969-12-31
19701970-01-261970-12-24
19711971-01-011971-12-20
19721972-01-021972-12-31
19731973-01-081973-12-31
19741974-01-011974-12-28
19751975-01-041975-12-31
19761976-01-031976-12-31
19771977-01-071977-12-25
19781978-01-081978-12-31

Every Fixed Threshold

Fixed thresholds at Chatsworth
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3859194642
25 mm (0.98 in): Days with 25 mm or more rain3823195714
50 mm (1.97 in): Days with 50 mm or more rain37819573
100 mm (3.94 in): Days with 100 mm or more rain4219541
10 cm (3.9 in): Days with 10 cm or more snowfall4219581

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.

Download the Data

  • Data for Chatsworth 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).