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Mammoth Lakes, California climate
Csb Warm-summer Mediterranean
Mammoth Lakes has a seasonal cold-temperate climate (Warm-summer Mediterranean, Köppen Csb). The hottest month is July with an average daily high near 26°C, while the coldest is February averaging around −8°C at night. Precipitation totals about 553 mm a year and is strongly seasonal — December alone averages 94 mm while September barely receives 9 mm. Snowfall is heavy (448 cm of snow per year on average).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Mammoth Lakes climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 5 | 8 | 10 | 15 | 21 | 26 | 25 | 22 | 16 | 9 | 5 |
| Avg temp (°C) | −2 | −2 | 1 | 4 | 8 | 13 | 17 | 16 | 13 | 7 | 2 | −2 |
| Avg low (°C) | −8 | −8 | −6 | −3 | 1 | 5 | 9 | 8 | 4 | −1 | −5 | −8 |
| Precipitation (mm) | 89 | 85 | 67 | 35 | 34 | 13 | 14 | 12 | 9 | 41 | 60 | 94 |
| Snowfall (cm) | 86 | 98 | 72 | 37 | 10 | 1 | — | — | 0 | 13 | 32 | 98 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 5 | 8 | 10 | 15 | 21 |
| Avg temp (°C) | −2 | −2 | 1 | 4 | 8 | 13 |
| Avg low (°C) | −8 | −8 | −6 | −3 | 1 | 5 |
| Precipitation (mm) | 89 | 85 | 67 | 35 | 34 | 13 |
| Snowfall (cm) | 86 | 98 | 72 | 37 | 10 | 1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 25 | 22 | 16 | 9 | 5 |
| Avg temp (°C) | 17 | 16 | 13 | 7 | 2 | −2 |
| Avg low (°C) | 9 | 8 | 4 | −1 | −5 | −8 |
| Precipitation (mm) | 14 | 12 | 9 | 41 | 60 | 94 |
| Snowfall (cm) | — | — | 0 | 13 | 32 | 98 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 7 | 8 | 6 | 6 | 5 | 2 | 3 | 2 | 2 | 4 | 5 | 7 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | — | 0.2 | — | — | — | — | — |
| Days with low ≤ 0°C (days) | 27 | 25 | 24 | 20 | 12 | 3 | 0.1 | 0.1 | 4 | 18 | 22 | 26 |
| Days with snowfall ≥ 2.5 cm (days) | 6 | 6 | 5 | 4 | 1 | 0.1 | — | — | 0.1 | 1 | 3 | 6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 7 | 8 | 6 | 6 | 5 | 2 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | — |
| Days with low ≤ 0°C (days) | 27 | 25 | 24 | 20 | 12 | 3 |
| Days with snowfall ≥ 2.5 cm (days) | 6 | 6 | 5 | 4 | 1 | 0.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 3 | 2 | 2 | 4 | 5 | 7 |
| Days with high ≥ 32°C (days) | 0.2 | — | — | — | — | — |
| Days with low ≤ 0°C (days) | 0.1 | 0.1 | 4 | 18 | 22 | 26 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | 0.1 | 1 | 3 | 6 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 56 | 59 | 57 | 54 | 52 | 36 | 35 | 28 | 26 | 33 | 45 | 54 |
| Relative humidity (%) | 70 | 73 | 72 | 65 | 58 | 45 | 40 | 35 | 38 | 44 | 55 | 68 |
| Wind speed (mph) | 4.9 | 5.5 | 5.8 | 6.2 | 5.7 | 5.5 | 4.6 | 4.6 | 4.5 | 4.6 | 5.0 | 5.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 56 | 59 | 57 | 54 | 52 | 36 |
| Relative humidity (%) | 70 | 73 | 72 | 65 | 58 | 45 |
| Wind speed (mph) | 4.9 | 5.5 | 5.8 | 6.2 | 5.7 | 5.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 35 | 28 | 26 | 33 | 45 | 54 |
| Relative humidity (%) | 40 | 35 | 38 | 44 | 55 | 68 |
| Wind speed (mph) | 4.6 | 4.6 | 4.5 | 4.6 | 5.0 | 5.1 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 24 years of daily observations at Mammoth Lakes RS, a weather station, inside the city. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.