What is the weather like in Napa vs San Francisco in January?

In January, Napa averages 16°C high / 5°C low with about 158 mm of rain; San Francisco averages 15°C high / 9°C low with about 123 mm.

Napa vs San Francisco in January

San Francisco is the better pick in January — 68 vs 64 on SeasonMap's comfort score. San Francisco is cool, rainy, clean air, while Napa is cool, soaked, clean air.

Napa vs San Francisco — January climate, side by side

	Napa	San Francisco
Comfort score	64/100 (C)	68/100 (C)
Feels-like high	14°C	13°C
Avg high / low	16° / 5°	15° / 9°
Rainfall	158 mm	123 mm
Rainy days	11	10
Humidity	80%	83%
Air quality (AQI)	32	45

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Napa vs San Francisco in January — FAQ

Is January better in Napa or San Francisco?: San Francisco is the better pick in January — 68 vs 64 on SeasonMap's comfort score. San Francisco is cool, rainy, clean air, while Napa is cool, soaked, clean air.
What is the weather like in Napa vs San Francisco in January?: In January, Napa averages 16°C high / 5°C low with about 158 mm of rain; San Francisco averages 15°C high / 9°C low with about 123 mm.