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Built 2026-10-19 (19 October 2026)

Anza Threshold Days by Year (USC00040235)

6 fixed thresholds counted per year at Anza (USC00040235): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Anza Thresholds

  • Anza: days with 10 mm (0.39 in) or more of precipitation in 40 years, most in 1978 with 28.
  • Anza: days with 25 mm (0.98 in) or more of precipitation in 34 years, most in 1980 with 11.
  • Anza: days with 50 mm (1.97 in) or more of precipitation in 14 years, most in 1976 with 2.
  • Anza: days with 10 cm (3.9 in) or more of snowfall in 12 years, most in 1952 with 3.
  • 6 fixed thresholds have at least one qualifying day at Anza.
40 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Anza Days per year at Anza with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 28 in 1978. 01020301950: 51951: 91955: 71956: 11957: 111958: 131959: 101960: 101961: 61962: 101963: 131971: 71974: 71975: 81976: 171977: 71978: 281979: 121980: 191981: 91982: 151983: 261984: 121985: 61986: 151987: 121988: 81989: 61990: 61991: 111992: 91993: 171995: 91996: 101997: 71998: 141999: 32000: 52002: 42004: 91950195719611974197819821986199019951999
Days per year at Anza with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 28 in 1978.
Days with 10 mm (0.39 in) or more of precipitation per year at Anza
YearDaysDecade average
195058
195198
195578
195618
1957118
1958138
1959108
1960109.8
196169.8
1962109.8
1963139.8
1971712.3
1974712.3
1975812.3
19761712.3
1977712.3
19782812.3
19791212.3
19801912.8
1981912.8
19821512.8
19832612.8
19841212.8
1985612.8
19861512.8
19871212.8
1988812.8
1989612.8
199069.6
1991119.6
199299.6
1993179.6
199599.6
1996109.6
199779.6
1998149.6
199939.6
200056
200246
200496
First to last qualifying date each year at Anza For each year, a bar from the first to the last day at Anza meeting 10 mm (0.39 in). 1950: 9 January 1950 to 14 November 19501951: 30 January 1951 to 31 December 19511955: 19 January 1955 to 2 December 19551956: 1 April 1956 to 1 April 19561957: 8 January 1957 to 16 December 19571958: 4 February 1958 to 29 July 19581959: 8 February 1959 to 25 December 19591960: 11 January 1960 to 27 November 19601961: 27 January 1961 to 3 December 19611962: 13 January 1962 to 19 October 19621963: 10 February 1963 to 21 November 19631971: 2 January 1971 to 28 December 19711974: 5 January 1974 to 29 October 19741975: 4 February 1975 to 28 November 19751976: 5 February 1976 to 31 December 19761977: 3 January 1977 to 6 November 19771978: 5 January 1978 to 19 December 19781979: 5 January 1979 to 22 December 19791980: 9 January 1980 to 5 December 19801981: 29 January 1981 to 7 September 19811982: 1 January 1982 to 22 December 19821983: 27 January 1983 to 26 December 19831984: 3 July 1984 to 27 December 19841985: 8 January 1985 to 3 December 19851986: 30 January 1986 to 7 December 19861987: 5 January 1987 to 17 December 19871988: 18 January 1988 to 20 December 19881989: 4 January 1989 to 31 December 19891990: 18 February 1990 to 20 December 19901991: 4 January 1991 to 30 December 19911992: 7 February 1992 to 28 December 19921993: 5 January 1993 to 12 December 19931995: 1 January 1995 to 3 September 19951996: 21 January 1996 to 10 December 19961997: 26 January 1997 to 8 December 19971998: 10 January 1998 to 6 December 19981999: 5 February 1999 to 12 July 19992000: 17 February 2000 to 30 August 20002002: 7 March 2002 to 17 December 20022004: 3 February 2004 to 29 December 200419501958196319771982198719921998JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Anza meeting 10 mm (0.39 in).
First to last qualifying date each year at Anza
YearFirst dateLast date
19501950-01-091950-11-14
19511951-01-301951-12-31
19551955-01-191955-12-02
19561956-04-011956-04-01
19571957-01-081957-12-16
19581958-02-041958-07-29
19591959-02-081959-12-25
19601960-01-111960-11-27
19611961-01-271961-12-03
19621962-01-131962-10-19
19631963-02-101963-11-21
19711971-01-021971-12-28
19741974-01-051974-10-29
19751975-02-041975-11-28
19761976-02-051976-12-31
19771977-01-031977-11-06
19781978-01-051978-12-19
19791979-01-051979-12-22
19801980-01-091980-12-05
19811981-01-291981-09-07
19821982-01-011982-12-22
19831983-01-271983-12-26
19841984-07-031984-12-27
19851985-01-081985-12-03
19861986-01-301986-12-07
19871987-01-051987-12-17
19881988-01-181988-12-20
19891989-01-041989-12-31
19901990-02-181990-12-20
19911991-01-041991-12-30
19921992-02-071992-12-28
19931993-01-051993-12-12
19951995-01-011995-09-03
19961996-01-211996-12-10
19971997-01-261997-12-08
19981998-01-101998-12-06
19991999-02-051999-07-12
20002000-02-172000-08-30
20022002-03-072002-12-17
20042004-02-032004-12-29

Every Fixed Threshold

Fixed thresholds at Anza
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain402819789
25 mm (0.98 in): Days with 25 mm or more rain341119804
50 mm (1.97 in): Days with 50 mm or more rain14219761
100 mm (3.94 in): Days with 100 mm or more rain1119911
10 cm (3.9 in): Days with 10 cm or more snowfall12319521
25 cm (9.8 in): Days with 25 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 1950.

Download the Data

  • Data for Anza 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).