Best time to visit Mammoth Lakes
The best time to visit Mammoth Lakes is June–September, judged on twenty years of weather records and the events worth going for.
Mammoth Lakes, California, United States
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 1.6 °C / 35 °F | -10.2 °C / 14 °F | 94 mm / 3.7 in | neither best nor good |
| February | 2.4 °C / 36 °F | -9.7 °C / 15 °F | 94 mm / 3.7 in | neither best nor good |
| March | 3.8 °C / 39 °F | -7.5 °C / 19 °F | 82 mm / 3.2 in | neither best nor good |
| April | 7.4 °C / 45 °F | -4.8 °C / 23 °F | 38 mm / 1.5 in | neither best nor good |
| May | 12.5 °C / 55 °F | -0.7 °C / 31 °F | 31 mm / 1.2 in | good month |
| June | 20.2 °C / 68 °F | 5.3 °C / 42 °F | 16 mm / 0.6 in | best month |
| July | 24.9 °C / 77 °F | 9.4 °C / 49 °F | 15 mm / 0.6 in | best month |
| August | 24.1 °C / 75 °F | 8.4 °C / 47 °F | 15 mm / 0.6 in | best month |
| September | 20.6 °C / 69 °F | 5.6 °C / 42 °F | 11 mm / 0.4 in | best month |
| October | 14.4 °C / 58 °F | -0.1 °C / 32 °F | 25 mm / 1 in | good month |
| November | 7.4 °C / 45 °F | -5.5 °C / 22 °F | 42 mm / 1.6 in | neither best nor good |
| December | 1.6 °C / 35 °F | -9.9 °C / 14 °F | 89 mm / 3.5 in | neither best nor good |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: neither
- MMay: good
- JJune: best
- JJuly: best
- AAugust: best
- SSeptember: best
- OOctober: good
- NNovember: neither
- DDecember: neither
- Best
- June–September
- Good
- May, October
Why these months
May · good
In its favour: precipitation 31 mm / 1.2 in, share of daylight that is sunny 94%, days with heavy rain 0.5 days, wet days 6.8 days, relative humidity 59%.
Against: feels like (high) 10.6 °C / 51 °F, average daily high 12.5 °C / 55 °F, average daily low -0.7 °C / 31 °F.
June · best
In its favour: feels like (high) 18.3 °C / 65 °F, average daily high 20.2 °C / 68 °F, precipitation 16 mm / 0.6 in, share of daylight that is sunny 93%, wet days 3.9 days, days with heavy rain 0.1 days, relative humidity 46%, average daily low 5.3 °C / 42 °F.
July · best
In its favour: feels like (high) 23.2 °C / 74 °F, average daily high 24.9 °C / 77 °F, precipitation 15 mm / 0.6 in, share of daylight that is sunny 95%, wet days 4.5 days, days with heavy rain 0 days, relative humidity 40%, average daily low 9.4 °C / 49 °F.
August · best
In its favour: feels like (high) 22 °C / 72 °F, average daily high 24.1 °C / 75 °F, precipitation 15 mm / 0.6 in, share of daylight that is sunny 97%, wet days 3.5 days, days with heavy rain 0.1 days, relative humidity 39%, average daily low 8.4 °C / 47 °F.
September · best
In its favour: feels like (high) 17.7 °C / 64 °F, average daily high 20.6 °C / 69 °F, precipitation 11 mm / 0.4 in, share of daylight that is sunny 95%, wet days 2.9 days, days with heavy rain 0.1 days, relative humidity 41%, average daily low 5.6 °C / 42 °F.
October · good
In its favour: precipitation 25 mm / 1 in, share of daylight that is sunny 94%, wet days 3.1 days, days with heavy rain 0.7 days, average daily high 14.4 °C / 58 °F, relative humidity 49%.
Against: feels like (high) 10.7 °C / 51 °F, average daily low -0.1 °C / 32 °F.
Hiking and trekking
Cool enough to climb in, dry enough to enjoy, long enough days.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: good
- MMay: best
- JJune: best
- JJuly: best
- AAugust: best
- SSeptember: best
- OOctober: best
- NNovember: neither
- DDecember: neither
- Best
- May–October
- Good
- April
Why these months
April · good
In its favour: precipitation 38 mm / 1.5 in, wet days 5.5 days, days with heavy rain 0.9 days, share of daylight that is sunny 92%, daylight per day 13.2 h, wind (daily max) 13 km/h / 8 mph.
Against: average daily high 7.4 °C / 45 °F, average daily low -4.8 °C / 23 °F, feels like (high) 5.1 °C / 41 °F.
May · best
In its favour: average daily high 12.5 °C / 55 °F, precipitation 31 mm / 1.2 in, wet days 6.8 days, days with heavy rain 0.5 days, share of daylight that is sunny 94%, daylight per day 14.2 h, feels like (high) 10.6 °C / 51 °F, wind (daily max) 13 km/h / 8 mph, average daily low -0.7 °C / 31 °F.
June · best
In its favour: average daily high 20.2 °C / 68 °F, precipitation 16 mm / 0.6 in, wet days 3.9 days, days with heavy rain 0.1 days, feels like (high) 18.3 °C / 65 °F, average daily low 5.3 °C / 42 °F, share of daylight that is sunny 93%, daylight per day 14.7 h, wind (daily max) 14 km/h / 9 mph.
July · best
In its favour: precipitation 15 mm / 0.6 in, wet days 4.5 days, days with heavy rain 0 days, average daily high 24.9 °C / 77 °F, average daily low 9.4 °C / 49 °F, share of daylight that is sunny 95%, daylight per day 14.5 h, feels like (high) 23.2 °C / 74 °F, wind (daily max) 13 km/h / 8 mph.
August · best
In its favour: precipitation 15 mm / 0.6 in, average daily high 24.1 °C / 75 °F, wet days 3.5 days, days with heavy rain 0.1 days, feels like (high) 22 °C / 72 °F, average daily low 8.4 °C / 47 °F, share of daylight that is sunny 97%, daylight per day 13.6 h, wind (daily max) 13 km/h / 8 mph.
September · best
In its favour: average daily high 20.6 °C / 69 °F, precipitation 11 mm / 0.4 in, wet days 2.9 days, days with heavy rain 0.1 days, feels like (high) 17.7 °C / 64 °F, average daily low 5.6 °C / 42 °F, share of daylight that is sunny 95%, daylight per day 12.4 h, wind (daily max) 13 km/h / 8 mph.
October · best
In its favour: average daily high 14.4 °C / 58 °F, precipitation 25 mm / 1 in, wet days 3.1 days, days with heavy rain 0.7 days, share of daylight that is sunny 94%, feels like (high) 10.7 °C / 51 °F, daylight per day 11.2 h, wind (daily max) 12 km/h / 8 mph, average daily low -0.1 °C / 32 °F.
Skiing and snow
Wants cold and snowfall; sunshine barely matters.
- JJanuary: best
- FFebruary: best
- MMarch: best
- AApril: best
- MMay: good
- JJune: neither
- JJuly: neither
- AAugust: neither
- SSeptember: neither
- OOctober: neither
- NNovember: best
- DDecember: best
- Best
- November–April
- Good
- May
Why these months
January · best
In its favour: snowfall 65 cm / 25.7 in, average daily high 1.6 °C / 35 °F, days with snow 10.3 days, average daily low -10.2 °C / 14 °F, wind (daily max) 10 km/h / 6 mph, daylight per day 9.9 h.
February · best
In its favour: snowfall 66 cm / 25.8 in, average daily high 2.4 °C / 36 °F, days with snow 10.7 days, average daily low -9.7 °C / 15 °F, wind (daily max) 12 km/h / 7 mph, daylight per day 10.8 h.
March · best
In its favour: snowfall 58 cm / 22.8 in, days with snow 12.2 days, average daily high 3.8 °C / 39 °F, average daily low -7.5 °C / 19 °F, wind (daily max) 12 km/h / 8 mph, daylight per day 12 h.
April · best
In its favour: snowfall 23 cm / 9.2 in, days with snow 7.8 days, average daily low -4.8 °C / 23 °F, wind (daily max) 13 km/h / 8 mph, daylight per day 13.2 h.
Against: average daily high 7.4 °C / 45 °F.
May · good
In its favour: average daily low -0.7 °C / 31 °F, wind (daily max) 13 km/h / 8 mph, daylight per day 14.2 h.
Against: snowfall 11 cm / 4.2 in, average daily high 12.5 °C / 55 °F, days with snow 4.8 days.
November · best
In its favour: snowfall 26 cm / 10.2 in, days with snow 7.1 days, average daily low -5.5 °C / 22 °F, wind (daily max) 12 km/h / 7 mph, daylight per day 10.1 h.
Against: average daily high 7.4 °C / 45 °F.
December · best
In its favour: snowfall 62 cm / 24.4 in, average daily high 1.6 °C / 35 °F, days with snow 11.3 days, average daily low -9.9 °C / 14 °F, wind (daily max) 11 km/h / 7 mph, daylight per day 9.6 h.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Mammoth Mountain, 1 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | -2.6 °C | -1.5 °C | 0.7 °C | 5.1 °C | 10.6 °C | 18.3 °C | 23.2 °C | 22 °C | 17.7 °C | 10.7 °C | 3.1 °C | -2.5 °C |
| Days with heavy rain | 2.9 days | 3 days | 2.5 days | 0.9 days | 0.5 days | 0.1 days | 0 days | 0.1 days | 0.1 days | 0.7 days | 1.4 days | 2.6 days |
| Time rain usually falls | 4 am | 2 am | 12 am | 4 pm | 4 pm | 3 pm | 3 pm | 4 pm | 4 pm | 5 pm | 3 am | 3 pm |
| Sunshine per day | 8.6 h | 9.5 h | 10.9 h | 12.2 h | 13.4 h | 13.7 h | 13.8 h | 13.1 h | 11.8 h | 10.6 h | 9.1 h | 8.3 h |
| Relative humidity | 61% | 61% | 64% | 63% | 59% | 46% | 40% | 39% | 41% | 49% | 56% | 63% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 2.8 µg/m³ | 4.2 µg/m³ | 4.4 µg/m³ | 6.7 µg/m³ | 6.2 µg/m³ | 6.3 µg/m³ | 5.6 µg/m³ | 5 µg/m³ | 8.4 µg/m³ | 3.3 µg/m³ | 3.6 µg/m³ | 3.2 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 5.1 µg/m³ | 8.2 µg/m³ | 9.1 µg/m³ | 11.7 µg/m³ | 10.2 µg/m³ | 10.4 µg/m³ | 8.7 µg/m³ | 7.9 µg/m³ | 14.1 µg/m³ | 5.6 µg/m³ | 6.6 µg/m³ | 6 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.