Lassen Volcanic National Park weather in May
May in Lassen Volcanic National Park: cool, rainy, with clean air — an excellent time to visit.
#6 of 12 months in Lassen Volcanic National Park · #321 of 604 destinations to visit in May · comfort 81/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Lassen Volcanic National Park climate normals — May
| Daytime high | 13°C / 56°F | 🙂 cool |
|---|---|---|
| Nighttime low | 2°C / 35°F | |
| Feels like (high) | 11°C / 52°F | |
| Rainfall | 82 mm / 3.2 in | 🌧 rainy |
| Rainy days | 12 days | |
| Humidity | 62% | 💧 humid |
| Dew point | -2°C / 29°F | |
| Sunshine | 12.4 h/day | |
| Daylight | 14.4 h | |
| Wind | 15 km/h / 9 mph | |
| Snowfall | 12.5 cm / 4.9 in | |
| Air quality (US AQI) | 50 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Lassen Volcanic National Park?
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Lassen Volcanic National Park in May — FAQ
- Is May a good time to visit Lassen Volcanic National Park?
- May in Lassen Volcanic National Park: cool, rainy, with clean air — an excellent time to visit. It ranks #6 of 12 months for Lassen Volcanic National Park on SeasonMap's comfort score (81/100).
- What is the weather like in Lassen Volcanic National Park in May?
- In May, Lassen Volcanic National Park averages a daily high of 13.2°C and a low of 1.5°C, with about 82.1 mm of rain over roughly 12.2 rainy days.
- What is the air quality in Lassen Volcanic National Park in May?
- Lassen Volcanic National Park has a mean US Air Quality Index of about 50 in May.
- Does it snow in Lassen Volcanic National Park in May?
- Lassen Volcanic National Park sees roughly 12.5 cm of snowfall in May.