Keystone is typically closed in September. Its season runs from Late October to Early May.
Keystone is closed in September. The figures below are historical monthly weather averages, not current operating conditions.
0cm
Avg Snowfall
15°C
Avg High (59°F)
3°C
Avg Low (37°F)
0"
Snowfall (inches)
In September, Keystone sees an average of 0cm (0 inches) of snowfall. Daytime temperatures typically reach 15°C (59°F) with overnight lows around 3°C (37°F). Milder temperatures mean lighter layering is enough, but a waterproof shell and sun protection are still worth packing.
Crowd Level
Not applicable, resort closedDay Pass Price
Closed
Keystone does not sell lift tickets in September because the resort is closed. Its season runs from Late October to Early May.
Keystone does not run lifts or patrol trails in September. The breakdown below reflects the resort's terrain mix when lifts are running, not a live trail report.
Keystone does not operate lifts or trails in September. Its season runs from Late October to Early May.