What is the weather like in Boise vs Denver in September?

In September, Boise averages 27°C high / 12°C low with about 8 mm of rain; Denver averages 29°C high / 11°C low with about 24 mm.

Boise vs Denver in September

Boise is the better pick in September — 94 vs 90 on SeasonMap's comfort score. Boise is warm, dry, clean air, while Denver is warm, dry, clean air.

Boise vs Denver — September climate, side by side

	🇺🇸 Boise	🇺🇸 Denver
Comfort score	94/100 (S)	90/100 (S)
Feels-like high	25°C	27°C
Avg high / low	27° / 12°	29° / 11°
Rainfall	8 mm	24 mm
Rainy days	3	3
Humidity	41%	46%
Air quality (AQI)	40	38

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

Month by month

Boise 🇺🇸 United Stateswarm, dry, clean air · best September94
Denver 🇺🇸 United Stateswarm, dry, clean air · best September90

Boise vs Denver in September — FAQ

Is September better in Boise or Denver?: Boise is the better pick in September — 94 vs 90 on SeasonMap's comfort score. Boise is warm, dry, clean air, while Denver is warm, dry, clean air.
What is the weather like in Boise vs Denver in September?: In September, Boise averages 27°C high / 12°C low with about 8 mm of rain; Denver averages 29°C high / 11°C low with about 24 mm.