Big Bend National Park vs Grand Canyon National Park in September

Big Bend National Park is the better pick in September — 81 vs 52 on SeasonMap's comfort score. Big Bend National Park is warm, a little rain, clean air, while Grand Canyon National Park is hot, dry, clean air.

Big Bend National Park vs Grand Canyon National ParkSeptember climate, side by side

Big Bend National ParkGrand Canyon National Park
Comfort score81/100 (A)52/100 (D)
Feels-like high28°C33°C
Avg high / low28° / 17°35° / 19°
Rainfall44 mm14 mm
Rainy days52
Humidity48%34%
Air quality (AQI)3838

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

Big Bend National Park vs Grand Canyon National Park in September — FAQ

Is September better in Big Bend National Park or Grand Canyon National Park?
Big Bend National Park is the better pick in September — 81 vs 52 on SeasonMap's comfort score. Big Bend National Park is warm, a little rain, clean air, while Grand Canyon National Park is hot, dry, clean air.
What is the weather like in Big Bend National Park vs Grand Canyon National Park in September?
In September, Big Bend National Park averages 28°C high / 17°C low with about 44 mm of rain; Grand Canyon National Park averages 35°C high / 19°C low with about 14 mm.