September is a good month at Glacier — it ranks 5th of the twelve here. Expect about 27% fewer visitors than July, the park's peak — 557,269 visits on average. Days run around 68°F by afternoon and 41°F at night, with 12.5 hours of daylight.
September against the park's best
| Month | Verdict | Avg. visits | vs. peak | High | Low | Snow | Daylight |
|---|---|---|---|---|---|---|---|
| September (this page) | Good | 557,269 | −27% | 68°F | 41°F | 0" | 12.5 h |
| May (best) | Excellent | 202,281 | −73% | 64°F | 39°F | 0.5" | 15.2 h |
| July (peak crowds) | Good | 761,346 | peak | 80°F | 50°F | 0" | 15.7 h |
Weather figures are for the West Glacier area — the W Glacier station. Visits are 2021–2025 averages; climate normals cover 1991–2020. Conditions vary across the park; check current status before you go.
Common questions
Is September a good time to visit Glacier?
Yes — a solid month, if not the very best. September ranks 5 of 12 at Glacier on crowds, weather, daylight, and access together.
How crowded is Glacier in September?
About 557,269 recreation visits on average — 27% below July, the park's peak.
How warm is Glacier in September?
Average highs around 68°F and lows around 41°F at the W Glacier station.
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