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Built 2026-10-19 (19 October 2026)

Mather Threshold Days by Year (USC00045400)

6 fixed thresholds counted per year at Mather (USC00045400): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mather Thresholds

  • Mather: days with 10 mm (0.39 in) or more of precipitation in 49 years, most in 1998 with 45.
  • Mather: days with 25 mm (0.98 in) or more of precipitation in 49 years, most in 1996 with 20.
  • Mather: days with 50 mm (1.97 in) or more of precipitation in 39 years, most in 1969 with 7.
  • Mather: days with 10 cm (3.9 in) or more of snowfall in 30 years, most in 1969 with 16.
  • 6 fixed thresholds have at least one qualifying day at Mather.
49 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Mather Days per year at Mather with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 45 in 1998. 02040601954: 311955: 281956: 211957: 251958: 351959: 181960: 251961: 181962: 171964: 201965: 281966: 151967: 321968: 231969: 331970: 371972: 211973: 231974: 191975: 271976: 71977: 181979: 251980: 271981: 241982: 311984: 181985: 211987: 231988: 181989: 181991: 141992: 181993: 301994: 261996: 381997: 171998: 451999: 252000: 302001: 292002: 232003: 272004: 212005: 362006: 312008: 232009: 192010: 411954195919651970197619821989199620012006
Days per year at Mather with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 45 in 1998.
Days with 10 mm (0.39 in) or more of precipitation per year at Mather
YearDaysDecade average
19543126.3
19552826.3
19562126.3
19572526.3
19583526.3
19591826.3
19602523.4
19611823.4
19621723.4
19642023.4
19652823.4
19661523.4
19673223.4
19682323.4
19693323.4
19703722.1
19722122.1
19732322.1
19741922.1
19752722.1
1976722.1
19771822.1
19792522.1
19802722.5
19812422.5
19823122.5
19841822.5
19852122.5
19872322.5
19881822.5
19891822.5
19911426.6
19921826.6
19933026.6
19942626.6
19963826.6
19971726.6
19984526.6
19992526.6
20003026.6
20012926.6
20022326.6
20032726.6
20042126.6
20053626.6
20063126.6
20082326.6
20091926.6
20104141
First to last qualifying date each year at Mather For each year, a bar from the first to the last day at Mather meeting 10 mm (0.39 in). 1954: 7 January 1954 to 31 December 19541955: 1 January 1955 to 31 December 19551956: 5 January 1956 to 5 December 19561957: 12 January 1957 to 23 December 19571958: 10 January 1958 to 27 December 19581959: 9 January 1959 to 24 December 19591960: 10 January 1960 to 2 December 19601961: 26 January 1961 to 2 December 19611962: 21 January 1962 to 16 December 19621964: 18 January 1964 to 31 December 19641965: 3 January 1965 to 30 December 19651966: 30 January 1966 to 5 December 19661967: 24 January 1967 to 5 December 19671968: 10 January 1968 to 26 December 19681969: 14 January 1969 to 22 December 19691970: 9 January 1970 to 21 December 19701972: 26 January 1972 to 4 December 19721973: 9 January 1973 to 28 December 19731974: 6 January 1974 to 4 December 19741975: 8 January 1975 to 28 November 19751976: 5 February 1976 to 11 September 19761977: 21 February 1977 to 23 December 19771979: 9 January 1979 to 31 December 19791980: 9 January 1980 to 4 December 19801981: 23 January 1981 to 27 December 19811982: 1 January 1982 to 23 December 19821984: 10 February 1984 to 16 December 19841985: 8 January 1985 to 30 December 19851987: 4 January 1987 to 30 December 19871988: 3 January 1988 to 31 December 19881989: 6 January 1989 to 26 November 19891991: 5 February 1991 to 27 October 19911992: 5 January 1992 to 30 December 19921993: 2 January 1993 to 15 December 19931994: 24 January 1994 to 28 December 19941996: 16 January 1996 to 30 December 19961997: 1 January 1997 to 8 December 19971998: 4 January 1998 to 6 December 19981999: 16 January 1999 to 17 November 19992000: 16 January 2000 to 12 December 20002001: 10 January 2001 to 31 December 20012002: 2 January 2002 to 31 December 20022003: 10 January 2003 to 30 December 20032004: 1 January 2004 to 31 December 20042005: 1 January 2005 to 26 December 20052006: 2 January 2006 to 31 December 20062008: 4 January 2008 to 25 December 20082009: 22 January 2009 to 13 December 20092010: 13 January 2010 to 26 December 20101954196119691977198719962003JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mather meeting 10 mm (0.39 in).
First to last qualifying date each year at Mather
YearFirst dateLast date
19541954-01-071954-12-31
19551955-01-011955-12-31
19561956-01-051956-12-05
19571957-01-121957-12-23
19581958-01-101958-12-27
19591959-01-091959-12-24
19601960-01-101960-12-02
19611961-01-261961-12-02
19621962-01-211962-12-16
19641964-01-181964-12-31
19651965-01-031965-12-30
19661966-01-301966-12-05
19671967-01-241967-12-05
19681968-01-101968-12-26
19691969-01-141969-12-22
19701970-01-091970-12-21
19721972-01-261972-12-04
19731973-01-091973-12-28
19741974-01-061974-12-04
19751975-01-081975-11-28
19761976-02-051976-09-11
19771977-02-211977-12-23
19791979-01-091979-12-31
19801980-01-091980-12-04
19811981-01-231981-12-27
19821982-01-011982-12-23
19841984-02-101984-12-16
19851985-01-081985-12-30
19871987-01-041987-12-30
19881988-01-031988-12-31
19891989-01-061989-11-26
19911991-02-051991-10-27
19921992-01-051992-12-30
19931993-01-021993-12-15
19941994-01-241994-12-28
19961996-01-161996-12-30
19971997-01-011997-12-08
19981998-01-041998-12-06
19991999-01-161999-11-17
20002000-01-162000-12-12
20012001-01-102001-12-31
20022002-01-022002-12-31
20032003-01-102003-12-30
20042004-01-012004-12-31
20052005-01-012005-12-26
20062006-01-022006-12-31
20082008-01-042008-12-25
20092009-01-222009-12-13
20102010-01-132010-12-26

Every Fixed Threshold

Fixed thresholds at Mather
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4945199841
25 mm (0.98 in): Days with 25 mm or more rain4920199617
50 mm (1.97 in): Days with 50 mm or more rain39719693
100 mm (3.94 in): Days with 100 mm or more rain3119551
10 cm (3.9 in): Days with 10 cm or more snowfall3016196916
25 cm (9.8 in): Days with 25 cm or more snowfall18319702

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1954.

Download the Data

  • Data for Mather 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).