May is an excellent month at Katmai — it ranks 2nd of the twelve here. Expect about 99% fewer visitors than July, the park's peak — 159 visits on average. Days run around 55°F by afternoon and 36°F at night, with 16.8 hours of daylight.
May against the park's best
| Month | Verdict | Avg. visits | vs. peak | High | Low | Snow | Daylight |
|---|---|---|---|---|---|---|---|
| May (this page) | Excellent | 159 | −99% | 55°F | 36°F | 0.6" | 16.8 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 May a good time to visit Katmai?
Yes — it is one of the best months of the year here. May ranks 2 of 12 at Katmai on crowds, weather, daylight, and access together.
How crowded is Katmai in May?
About 159 recreation visits on average — 99% below July, the park's peak.
How warm is Katmai in May?
Average highs around 55°F and lows around 36°F at the King Salmon station.