September is an excellent month at Katmai — it ranks 3rd of the twelve here. Expect about 56% fewer visitors than July, the park's peak — 5,472 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) | Excellent | 5,472 | −56% | 56°F | 41°F | 0" | 12.7 h |
| June (best) | Excellent | 4,220 | −66% | 62°F | 44°F | 0" | 18.3 h |
| July (peak crowds) | Good | 12,537 | peak | 65°F | 49°F | 0" | 17.7 h |
Weather figures are for the King Salmon area (gateway community) — the King Salmon 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 Katmai?
Yes — it is one of the best months of the year here. September ranks 3 of 12 at Katmai on crowds, weather, daylight, and access together.
How crowded is Katmai in September?
About 5,472 recreation visits on average — 56% below July, the park's peak.
How warm is Katmai in September?
Average highs around 56°F and lows around 41°F at the King Salmon station.
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