What is the weather like in Channel Islands National Park vs San Diego in September?

In September, Channel Islands National Park averages 19°C high / 17°C low with about 5 mm of rain; San Diego averages 26°C high / 19°C low with about 6 mm.

Channel Islands National Park vs San Diego in September

Channel Islands National Park and San Diego are nearly tied in September — 89 vs 91 on SeasonMap's comfort score. Channel Islands National Park is nice, dry, clean air; San Diego is warm, dry, muggy air.

Channel Islands National Park vs San Diego — September climate, side by side

	🇺🇸 Channel Islands National Park	🇺🇸 San Diego
Comfort score	89/100 (A)	91/100 (S)
Feels-like high	19°C	27°C
Avg high / low	19° / 17°	26° / 19°
Rainfall	5 mm	6 mm
Rainy days	1	1
Humidity	82%	77%
Air quality (AQI)	34	53

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

Month by month

Channel Islands National Park vs San Diego in September — FAQ

Is September better in Channel Islands National Park or San Diego?: Channel Islands National Park and San Diego are nearly tied in September — 89 vs 91 on SeasonMap's comfort score. Channel Islands National Park is nice, dry, clean air; San Diego is warm, dry, muggy air.
What is the weather like in Channel Islands National Park vs San Diego in September?: In September, Channel Islands National Park averages 19°C high / 17°C low with about 5 mm of rain; San Diego averages 26°C high / 19°C low with about 6 mm.