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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Mammoth Lakes Rs Threshold Days by Year

13 fixed thresholds counted per year at Mammoth Lakes Rs (USC00045280): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mammoth Lakes Rs Thresholds

  • Mammoth Lakes Rs: days with 10 cm (3.9 in) or more of snowfall in 21 years, most in 2006 with 28.
  • Mammoth Lakes Rs: days with a maximum temperature at or below 0 C (32 F) in 20 years, most in 1998 with 37.
  • Mammoth Lakes Rs: days with 10 mm (0.39 in) or more of precipitation in 18 years, most in 1996 with 32.
  • Mammoth Lakes Rs: days with 25 cm (9.8 in) or more of snowfall in 18 years, most in 1995 with 12.
  • 13 fixed thresholds have at least one qualifying day at Mammoth Lakes Rs.
12 years with a qualifying day
Days at or above 30 C (86 F) per year at Mammoth Lakes Rs Days per year at Mammoth Lakes Rs with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 7 in 2002. 024681996: 21997: 31998: 61999: 22002: 72003: 22005: 22006: 12007: 42008: 42013: 52016: 4199619982002200520072013
Days per year at Mammoth Lakes Rs with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 7 in 2002.
Days at or above 30 C (86 F) per year at Mammoth Lakes Rs
YearDaysDecade average
199623.3
199733.3
199863.3
199923.3
200273.3
200323.3
200523.3
200613.3
200743.3
200843.3
201354.5
201644.5
First to last qualifying date each year at Mammoth Lakes Rs For each year, a bar from the first to the last day at Mammoth Lakes Rs meeting 30 C (86 F). 1996: 8 July 1996 to 31 August 19961997: 9 July 1997 to 8 August 19971998: 17 July 1998 to 30 August 19981999: 1 July 1999 to 10 July 19992002: 9 July 2002 to 15 August 20022003: 10 July 2003 to 23 July 20032005: 19 July 2005 to 21 July 20052006: 18 July 2006 to 18 July 20062007: 4 July 2007 to 9 July 20072008: 9 July 2008 to 29 August 20082013: 9 June 2013 to 22 July 20132016: 25 July 2016 to 30 July 2016199619982002200520072013JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mammoth Lakes Rs meeting 30 C (86 F).
First to last qualifying date each year at Mammoth Lakes Rs
YearFirst dateLast date
19961996-07-081996-08-31
19971997-07-091997-08-08
19981998-07-171998-08-30
19991999-07-011999-07-10
20022002-07-092002-08-15
20032003-07-102003-07-23
20052005-07-192005-07-21
20062006-07-182006-07-18
20072007-07-042007-07-09
20082008-07-092008-08-29
20132013-06-092013-07-22
20162016-07-252016-07-30

Every Fixed Threshold

Fixed thresholds at Mammoth Lakes Rs
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days12720024
90 F (32.2 C): Days4220021
0 C (32 F): Ice days (max2037199813
0 C (32 F): Frost days (min122222004156
-10 C (14 F): Days with min1256200430
-20 C (-4 F): Days with min10720132
10 mm (0.39 in): Days with 10 mm or more rain1832199617
25 mm (0.98 in): Days with 25 mm or more rain171219955
50 mm (1.97 in): Days with 50 mm or more rain11319951
100 mm (3.94 in): Days with 100 mm or more rain2120091
10 cm (3.9 in): Days with 10 cm or more snowfall2128200610
25 cm (9.8 in): Days with 25 cm or more snowfall181219952
50 cm (19.7 in): Days with 50 cm or more snowfall8319961

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1996.

Download the Data

  • Data for Mammoth Lakes Rs 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).