Mammoth Lakes Weather in December
Average highs run from 43°F on December 1 to 41°F on December 31, and lows from 19°F to 17°F. Normal precipitation for the month is 4.07 in.
December day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 41°F
- Average low
- 17°F
- Precipitation
- 4.07 in
- Snowfall
- 11.6 in
- Record high
- 64°FDec 2, 2008
- Record low
- -12°FDec 21, 1998
- Chance of a freeze
- 100%
- Daylight
- 9 h 46 min to 9 h 36 min
- Cloud cover
- 54%
- Humidity
- 68%
- Dew point
- 13°F
- Wind
- 7.8 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Dec 1 | 43°F | 19°F | 62°F 1995 | -3°F 2019 | 10% | |
| Dec 2 | 43°F | 19°F | 64°F 2008 | 5°F 2004 | 11% | |
| Dec 3 | 43°F | 19°F | 55°F 2008 | -2°F 2004 | 11% | |
| Dec 4 | 43°F | 18°F | 59°F 1993 | -1°F 2001 | 11% | |
| Dec 5 | 42°F | 18°F | 61°F 2007 | -7°F 2013 | 12% | |
| Dec 6 | 42°F | 18°F | 59°F 2007 | -2°F 1998 | 12% | |
| Dec 7 | 42°F | 18°F | 56°F 1995 | -1°F 1998 | 12% | |
| Dec 8 | 42°F | 18°F | 56°F 2015 | -5°F 2013 | 12% | |
| Dec 9 | 42°F | 18°F | 56°F 1995 | -7°F 2009 | 13% | |
| Dec 10 | 41°F | 17°F | 58°F 2004 | -2°F 1997 | 13% | |
| Dec 11 | 41°F | 17°F | 61°F 2008 | 1°F 1997 | 13% | |
| Dec 12 | 41°F | 17°F | 63°F 2004 | 0°F 1997 | 14% | |
| Dec 13 | 41°F | 17°F | 60°F 2010 | 6°F 1997 | 14% | |
| Dec 14 | 41°F | 17°F | 61°F 2017 | -1°F 1994 | 14% | |
| Dec 15 | 41°F | 17°F | 57°F 2017 | -9°F 2015 | 14% | |
| Dec 16 | 41°F | 17°F | 58°F 2017 | -7°F 2015 | 14% | |
| Dec 17 | 41°F | 17°F | 60°F 1999 | 0°F 1993 | 15% | |
| Dec 18 | 41°F | 17°F | 61°F 1998 | -3°F 2006 | 15% | |
| Dec 19 | 41°F | 17°F | 57°F 2017 | -5°F 2012 | 15% | |
| Dec 20 | 41°F | 17°F | 57°F 2004 | -3°F 2012 | 15% | |
| Dec 21 | 41°F | 17°F | 57°F 2020 | -12°F 1998 | 15% | |
| Dec 22 | 41°F | 17°F | 55°F 2014 | -5°F 1993 | 15% | |
| Dec 23 | 41°F | 17°F | 56°F 2014 | -4°F 1998 | 15% | |
| Dec 24 | 41°F | 16°F | 54°F 2005 | -4°F 2002 | 15% | |
| Dec 25 | 41°F | 16°F | 54°F 2017 | 0°F 2015 | 15% | |
| Dec 26 | 41°F | 17°F | 56°F 1996 | -8°F 2002 | 15% | |
| Dec 27 | 41°F | 17°F | 55°F 2017 | -5°F 2003 | 15% | |
| Dec 28 | 41°F | 17°F | 56°F 2017 | -4°F 2003 | 15% | |
| Dec 29 | 41°F | 17°F | 62°F 2017 | 1°F 2003 | 16% | |
| Dec 30 | 41°F | 17°F | 63°F 2017 | -6°F 2010 | 16% | |
| Dec 31 | 41°F | 17°F | 57°F 2013 | -3°F 2010 | 16% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 6:52 AM, sunset 4:38 PM
- December 31
- sunrise 7:11 AM, sunset 4:47 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00045280 (Mammoth Lakes RS), public domain. Records: NOAA GHCN-Daily, station USC00045280, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.