Best time to visit St. Helena, CA
A month-by-month travel weather guide based on NOAA 30-year climate normals.
The most comfortable travel window in St. Helena runs from March through June — 4 months of pleasant temperatures and modest rainfall.
Frequent rain. Bring waterproof gear; outdoor plans need flexibility.
Daylight ≈ 9h 36m
Frequent rain. Bring waterproof gear; outdoor plans need flexibility.
Daylight ≈ 10h 33m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 11h 45m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 13h 1m
Sweet spot — comfortable highs in the 65-80°F range, mild nights, low rain. Ideal for nearly any outdoor plan.
Daylight ≈ 14h 6m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 14h 39m
Summer heat. Avoid midday exertion; aim for morning and evening activities.
Daylight ≈ 14h 26m
Summer heat. Avoid midday exertion; aim for morning and evening activities.
Daylight ≈ 13h 30m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 12h 14m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 10h 58m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 9h 52m
Frequent rain. Bring waterproof gear; outdoor plans need flexibility.
Daylight ≈ 9h 19m
Looking for similar climates? See St. Helena's climate twins. Or jump straight to the full climate profile.