Mammoth Lakes weather in January
January in Mammoth Lakes: cold, rainy, with clean air — an excellent time to visit.
#3 of 12 months in Mammoth Lakes · #94 of 897 destinations to visit in January · comfort 89/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Mammoth Lakes in January
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Mammoth Lakes climate normals — January
| Daytime high | 2°C / 35°F | 🧥 cold |
|---|---|---|
| Nighttime low | -8°C / 18°F | |
| Rainfall | 115 mm / 4.5 in | 🌧 rainy |
| Rainy days | 7 days | |
| Humidity | 64% | 💧 humid |
| Dew point | -11°C / 11°F | |
| Sunshine | 8 h/day | |
| Daylight | 9.9 h | |
| Wind | 11 km/h / 7 mph | |
| Snowfall | 96 cm / 37.8 in | |
| Air quality (US AQI) | 43 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Mammoth Lakes in January — FAQ
- Is January a good time to visit Mammoth Lakes?
- January in Mammoth Lakes: cold, rainy, with clean air — an excellent time to visit. It ranks #3 of 12 months for Mammoth Lakes on SeasonMap's comfort score (89/100).
- What is the weather like in Mammoth Lakes in January?
- In January, Mammoth Lakes averages a daily high of 1.6°C and a low of -8°C, with about 115.3 mm of rain over roughly 6.6 rainy days.
- What is the air quality in Mammoth Lakes in January?
- Mammoth Lakes has a mean US Air Quality Index of about 43 in January.
- Does it snow in Mammoth Lakes in January?
- Mammoth Lakes sees roughly 96 cm of snowfall in January.