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Data as of 2025-12-31
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Built 2026-10-17 (17 October 2026)

Mammoth Mine Threshold Days by Year

5 fixed thresholds counted per year at Mammoth Mine (ASN00029094): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mammoth Mine Thresholds

  • Mammoth Mine: days with 10 mm (0.39 in) or more of precipitation in 27 years, most in 1974 with 35.
  • Mammoth Mine: days with 25 mm (0.98 in) or more of precipitation in 26 years, most in 2000 with 14.
  • Mammoth Mine: days with 50 mm (1.97 in) or more of precipitation in 21 years, most in 1974 with 6.
  • Mammoth Mine: days with 100 mm (3.94 in) or more of precipitation in 6 years, most in 1999 with 2.
  • 5 fixed thresholds have at least one qualifying day at Mammoth Mine.
27 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Mammoth Mine Days per year at Mammoth Mine with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 35 in 1974. 0102030401972: 111973: 231974: 351975: 171976: 171977: 231978: 131979: 141980: 101981: 231983: 121984: 111992: 101993: 211994: 61995: 131996: 111997: 191998: 181999: 152000: 332001: 172002: 72003: 102004: 142005: 82006: 20197219751978198119921995199820012004
Days per year at Mammoth Mine with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 35 in 1974.
Days with 10 mm (0.39 in) or more of precipitation per year at Mammoth Mine
YearDaysDecade average
19721119.1
19732319.1
19743519.1
19751719.1
19761719.1
19772319.1
19781319.1
19791419.1
19801014
19812314
19831214
19841114
19921014.1
19932114.1
1994614.1
19951314.1
19961114.1
19971914.1
19981814.1
19991514.1
20003315.6
20011715.6
2002715.6
20031015.6
20041415.6
2005815.6
20062015.6
First to last qualifying date each year at Mammoth Mine For each year, a bar from the first to the last day at Mammoth Mine meeting 10 mm (0.39 in). 1972: 16 February 1972 to 27 November 19721973: 10 January 1973 to 26 November 19731974: 3 January 1974 to 29 December 19741975: 2 January 1975 to 19 December 19751976: 3 January 1976 to 30 December 19761977: 15 January 1977 to 19 December 19771978: 16 January 1978 to 30 December 19781979: 6 January 1979 to 13 November 19791980: 1 January 1980 to 31 December 19801981: 8 January 1981 to 23 December 19811983: 1 January 1983 to 30 December 19831984: 7 January 1984 to 3 November 19841992: 26 January 1992 to 17 December 19921993: 7 January 1993 to 24 December 19931994: 18 January 1994 to 4 March 19941995: 14 January 1995 to 29 December 19951996: 3 January 1996 to 18 December 19961997: 1 January 1997 to 29 December 19971998: 17 January 1998 to 31 December 19981999: 1 January 1999 to 24 December 19992000: 7 February 2000 to 28 December 20002001: 26 January 2001 to 31 December 20012002: 7 January 2002 to 1 March 20022003: 1 January 2003 to 4 December 20032004: 12 January 2004 to 25 December 20042005: 5 January 2005 to 20 November 20052006: 18 January 2006 to 7 December 20061972197619801992199620002004JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mammoth Mine meeting 10 mm (0.39 in).
First to last qualifying date each year at Mammoth Mine
YearFirst dateLast date
19721972-02-161972-11-27
19731973-01-101973-11-26
19741974-01-031974-12-29
19751975-01-021975-12-19
19761976-01-031976-12-30
19771977-01-151977-12-19
19781978-01-161978-12-30
19791979-01-061979-11-13
19801980-01-011980-12-31
19811981-01-081981-12-23
19831983-01-011983-12-30
19841984-01-071984-11-03
19921992-01-261992-12-17
19931993-01-071993-12-24
19941994-01-181994-03-04
19951995-01-141995-12-29
19961996-01-031996-12-18
19971997-01-011997-12-29
19981998-01-171998-12-31
19991999-01-011999-12-24
20002000-02-072000-12-28
20012001-01-262001-12-31
20022002-01-072002-03-01
20032003-01-012003-12-04
20042004-01-122004-12-25
20052005-01-052005-11-20
20062006-01-182006-12-07

Every Fixed Threshold

Fixed thresholds at Mammoth Mine
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2735197420
25 mm (0.98 in): Days with 25 mm or more rain261420009
50 mm (1.97 in): Days with 50 mm or more rain21619743
100 mm (3.94 in): Days with 100 mm or more rain6219991
200 mm (7.87 in): Days with 200 mm or more rain2120041

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1972.

Download the Data

  • Data for Mammoth Mine 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).