September is a good month at Glacier Bay — it ranks 5th of the twelve here. Expect about 25% fewer visitors than July, the park's peak — 88,442 visits on average. Days run around 56°F by afternoon and 41°F at night, with 12.7 hours of daylight.
September against the park's best
| Month | Verdict | Avg. visits | vs. peak | High | Low | Snow | Daylight |
|---|---|---|---|---|---|---|---|
| September (this page) | Good | 88,442 | −25% | 56°F | 41°F | — | 12.7 h |
| May (best) | Excellent | 82,478 | −30% | 57°F | 35°F | — | 16.8 h |
| July (peak crowds) | Good | 117,153 | peak | 63°F | 47°F | — | 17.6 h |
Weather figures are for the Bartlett Cove area — the Gustavus 2 Ne 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 Bay?
Yes — a solid month, if not the very best. September ranks 5 of 12 at Glacier Bay on crowds, weather, daylight, and access together.
How crowded is Glacier Bay in September?
About 88,442 recreation visits on average — 25% below July, the park's peak.
How warm is Glacier Bay in September?
Average highs around 56°F and lows around 41°F at the Gustavus 2 Ne station.
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