Climateby Month

Mammoth Lakes, CA climate by month

NOAA 1991-2020 normals · 7,873 ft elevation

Mammoth Lakes has mild summers and cold and snowy winters. Highs peak at 78°F in July and fall to 41°F in February. The wettest month is February (about 9 wet days) and the driest is August (about 2). Normal snowfall is about 70 in a year. By our comfort score the best months are June, August and September.

Warmest month
78°F
July normal high
Coldest month
17°F
January normal low
Wet days a year
64
23.7 in of precipitation
Snow a year
69.5 in
normal snowfall

How warm is Mammoth Lakes?

Normal highs range from 41°F in February to 78°F in July.

0°20°40°60°80° January: normal high 41°F (5°C), low 17°F (-8°C) 41° 17° February: normal high 41°F (5°C), low 18°F (-8°C) March: normal high 46°F (8°C), low 22°F (-6°C) April: normal high 51°F (11°C), low 27°F (-3°C) May: normal high 60°F (16°C), low 35°F (2°C) June: normal high 70°F (21°C), low 42°F (6°C) July: normal high 78°F (26°C), low 49°F (9°C) 78° 49° August: normal high 77°F (25°C), low 47°F (8°C) September: normal high 71°F (22°C), low 40°F (4°C) October: normal high 61°F (16°C), low 30°F (-1°C) November: normal high 49°F (9°C), low 23°F (-5°C) December: normal high 41°F (5°C), low 17°F (-8°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Mammoth Lakes?

February has the most wet days (about 9); the year brings about 24 in of precipitation.

January: 8 wet days February: 9 wet days 9 March: 7 wet days April: 7 wet days May: 6 wet days June: 3 wet days July: 4 wet days August: 2 wet days 2 September: 2 wet days October: 4 wet days November: 5 wet days December: 8 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 69.5 in a year, most of it in January.

January: 19.0 in of snow 19.0 February: 16.1 in of snow March: 11.6 in of snow April: 3.3 in of snow May: 1.6 in of snow June: 0.2 in of snow July: 0.0 in of snow 0.0 August: 0.0 in of snow September: 0.0 in of snow October: 1.4 in of snow November: 4.7 in of snow December: 11.6 in of snow JFMAMJJASOND

How humid is Mammoth Lakes?

Humidity data is not available for this location.

How much daylight?

Daylight ranges from about 9.6 hours in December to 14.7 hours in June.

January: 9.9 hours of daylight February: 10.8 hours of daylight March: 12.0 hours of daylight April: 13.2 hours of daylight May: 14.2 hours of daylight June: 14.7 hours of daylight 14.7 July: 14.5 hours of daylight August: 13.6 hours of daylight September: 12.4 hours of daylight October: 11.2 hours of daylight November: 10.2 hours of daylight December: 9.6 hours of daylight 9.6 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Mammoth Lakes, 1991-2020
MonthHighLowPrecip.Wet daysSnowDaylight
January 41°F17°F 4.2 in8 19.0 in 9.9 h
February 41°F18°F 3.8 in9 16.1 in 10.8 h
March 46°F22°F 3.3 in7 11.6 in 12.0 h
April 51°F27°F 1.5 in7 3.3 in 13.2 h
May 60°F35°F 1.5 in6 1.6 in 14.2 h
June 70°F42°F 0.5 in3 0.2 in 14.7 h
July 78°F49°F 0.5 in4 0.0 in 14.5 h
August 77°F47°F 0.5 in2 0.0 in 13.6 h
September 71°F40°F 0.5 in2 0.0 in 12.4 h
October 61°F30°F 1.4 in4 1.4 in 11.2 h
November 49°F23°F 2.0 in5 4.7 in 10.2 h
December 41°F17°F 4.1 in8 11.6 in 9.6 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Mammoth Lakes

By our comfort score, the best months are June, August and September.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 330614
Feb 340614
Mar 430510
Apr 51346
May 691131
Jun 862110
Jul 832020
Aug 852310
Sep 852410
Oct 621232
Nov 42247
Dec 330614

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. Comfortable days here are judged by temperature only (no humidity station nearby). How the score works.

Frost dates in Mammoth Lakes

The last spring frost typically comes around Jun 10, and the first fall frost around Sep 17, leaving 98 frost-free days in a typical year.

Frost and freeze dates for Mammoth Lakes
Typical date1 year in 10
Last spring frost (32°F)Jun 10after Jun 30
First fall frost (32°F)Sep 17before Sep 2
Last hard freeze (28°F)May 31after Jun 16
First hard freeze (28°F)Oct 1before Sep 15
Frost-free season98 daysunder 75 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Mammoth Lakes RS (USC00045280), NOAA 1991-2020 freeze probabilities. Frost dates for every city in California.

Hottest and coldest readings, 1991-2020

The highest reading was 91°F (July 11, 2002, and 1 other day); the lowest was -16°F (January 13, 2007).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Mammoth Lakes

Similar climates elsewhere

Where the numbers come from

  • Temperature, rain and frost dates: Mammoth Lakes RS (USC00045280), 0.6 mi E of the city center, 7,804 ft (69 ft lower than the city). NOAA normals and daily records, 1991-2020.
  • Snowfall and snow depth: Lee Vining (USC00044881), 23 mi NNW of the city center, 6,797 ft (1,076 ft lower than the city). NOAA normals and daily records, 1991-2020.
  • Not available for this location: humidity and wind by hour, cloud cover and daily humidity and wind (no station close enough or similar enough in elevation).

Distances from the city center (USGS). Methodology · Report an error