Grand Teton (4199m) — September
Monthly conditions and weather data
Weather Quality
3
Temperature
-6–4°C
Precipitation
139 mm
Crowd Level
2
Snow Likelihood
3/5
Daylight Hours
12.4h
Avg Temperature
-1°C
Summary
September on Grand Teton: cool conditions (-6C to 4C), wet (139mm). Some snow possible.