September is a good month at Theodore Roosevelt — it ranks 5th of the twelve here. Expect about 25% fewer visitors than July, the park's peak — 120,432 visits on average. Days run around 74°F by afternoon and 43°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 | 120,432 | −25% | 74°F | 43°F | 0.1" | 12.5 h |
| April (best) | Excellent | 10,833 | −93% | 56°F | 30°F | 3.4" | 13.5 h |
| July (peak crowds) | Good | 160,797 | peak | 86°F | 56°F | 0" | 15.5 h |
Weather figures are for the Medora area — the Medora 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 Theodore Roosevelt?
Yes — a solid month, if not the very best. September ranks 5 of 12 at Theodore Roosevelt on crowds, weather, daylight, and access together.
How crowded is Theodore Roosevelt in September?
About 120,432 recreation visits on average — 25% below July, the park's peak.
How warm is Theodore Roosevelt in September?
Average highs around 74°F and lows around 43°F at the Medora station.
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