What is the weather like in Big Sur vs Napa in September?

In September, Big Sur averages 27°C high / 13°C low with about 5 mm of rain; Napa averages 30°C high / 13°C low with about 5 mm.

Big Sur vs Napa in September

Big Sur and Napa are nearly tied in September — 87 vs 88 on SeasonMap's comfort score. Big Sur is warm, dry, clean air; Napa is hot, dry, clean air.

Big Sur vs Napa — September climate, side by side

	🇺🇸 Big Sur	🇺🇸 Napa
Comfort score	87/100 (A)	88/100 (A)
Feels-like high	28°C	30°C
Avg high / low	27° / 13°	30° / 13°
Rainfall	5 mm	5 mm
Rainy days	1	1
Humidity	72%	59%
Air quality (AQI)	33	34

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

Month by month

Big Sur 🇺🇸 United Stateswarm, dry, clean air · best August87
Napa 🇺🇸 United Stateshot, dry, clean air · best May88

Big Sur vs Napa in September — FAQ

Is September better in Big Sur or Napa?: Big Sur and Napa are nearly tied in September — 87 vs 88 on SeasonMap's comfort score. Big Sur is warm, dry, clean air; Napa is hot, dry, clean air.
What is the weather like in Big Sur vs Napa in September?: In September, Big Sur averages 27°C high / 13°C low with about 5 mm of rain; Napa averages 30°C high / 13°C low with about 5 mm.