What is the weather like in Big Sur vs San Francisco in September?

In September, Big Sur averages 27°C high / 13°C low with about 5 mm of rain; San Francisco averages 22°C high / 14°C low with about 3 mm.

Big Sur vs San Francisco in September

San Francisco is the better pick in September — 96 vs 87 on SeasonMap's comfort score. San Francisco is nice, dry, clean air, while Big Sur is warm, dry, clean air.

Big Sur vs San Francisco — September climate, side by side

	🇺🇸 Big Sur	🇺🇸 San Francisco
Comfort score	87/100 (A)	96/100 (S)
Feels-like high	28°C	21°C
Avg high / low	27° / 13°	22° / 14°
Rainfall	5 mm	3 mm
Rainy days	1	1
Humidity	72%	75%
Air quality (AQI)	33	35

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

Month by month

Big Sur vs San Francisco in September — FAQ

Is September better in Big Sur or San Francisco?: San Francisco is the better pick in September — 96 vs 87 on SeasonMap's comfort score. San Francisco is nice, dry, clean air, while Big Sur is warm, dry, clean air.
What is the weather like in Big Sur vs San Francisco in September?: In September, Big Sur averages 27°C high / 13°C low with about 5 mm of rain; San Francisco averages 22°C high / 14°C low with about 3 mm.