What is the weather like in Jasper vs Yellowstone National Park in September?

In September, Jasper averages 18°C high / 3°C low with about 48 mm of rain; Yellowstone National Park averages 17°C high / 1°C low with about 59 mm.

Jasper vs Yellowstone National Park in September

Jasper is the better pick in September — 90 vs 84 on SeasonMap's comfort score. Jasper is nice, a little rain, clean air, while Yellowstone National Park is cool, a little rain, clean air.

Jasper vs Yellowstone National Park — September climate, side by side

	Jasper	Yellowstone National Park
Comfort score	90/100 (S)	84/100 (A)
Feels-like high	16°C	14°C
Avg high / low	18° / 3°	17° / 1°
Rainfall	48 mm	59 mm
Rainy days	11	11
Humidity	77%	59%
Air quality (AQI)	35	43

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

Jasper vs Yellowstone National Park in September — FAQ

Is September better in Jasper or Yellowstone National Park?: Jasper is the better pick in September — 90 vs 84 on SeasonMap's comfort score. Jasper is nice, a little rain, clean air, while Yellowstone National Park is cool, a little rain, clean air.
What is the weather like in Jasper vs Yellowstone National Park in September?: In September, Jasper averages 18°C high / 3°C low with about 48 mm of rain; Yellowstone National Park averages 17°C high / 1°C low with about 59 mm.