September in St. Louis, MO: shoulder season for golf — playable with smart tee time selection. Best tee times: morning before noon for the most comfortable round.
| Average September Weather | |
|---|---|
| Avg daily high | 82°F |
| Avg daily low | 63°F |
| Rainy days | 11 / mo |
| Avg peak wind | 9.3 mph |
The defining variable in September is the drop in humidity that finally separates this month from summer. The high holds at 82°F — still warm enough that a morning round in a polo is perfectly comfortable — but the low falls to 63°F, well inside the ideal 60–80°F window. That 19°F daily swing means early tee times reward players who want crisp air without dragging on a layer mid-round. Precipitation pulls back sharply from August's heavy calendar, landing at just 11 days, tied for the second-driest mark of the year. Wind averages 9.3 mph at peak, barely above the calm threshold, so shot-shaping decisions stay about execution, not survival.
The result is a month where conditions rarely fight you. The fairways firm up after August's wet stretch, approaches release predictably, and late-afternoon rounds stay light well past the back nine.
With only 11 rain days spread across the month, weekday afternoon slots open up more reliably than in summer — book 2–4 days out rather than a week ahead and you'll have better flexibility to dodge the occasional shower. Early-morning weekend times still move fast given the favorable conditions, so lock those in at least a week out. See how conditions rate hour by hour on our playability scale.
September sheds five rain days compared to August's 16, which is the most consequential shift of the transition — the heat drops only 3°F while the course plays considerably drier. October matches September's 11 precip days exactly, so the rain calendar doesn't change, but the high temperature falls a steep 13°F and peak wind jumps 2.1 mph, making September the more comfortable scoring month of the two. If you have flexibility, September gives you August's warmth with October's weather reliability.
Climate normals show the long-term picture, but day-to-day weather varies. Check today's live golf weather score for St. Louis, MO for the current playability rating, hourly wind, temperature, and the recommended tee time window.
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Yes — September is tied for the second-driest month of the year at 11 precipitation days, and peak wind averages just 9.3 mph, the third-calmest reading of any month. The average high of 82°F stays within the ideal playing range while the humidity profile is considerably more comfortable than August. It's one of the most consistently playable months on the St. Louis golf calendar.
The biggest shift is rainfall — September drops five fewer precipitation days than August's 16, meaning far fewer rounds are interrupted or postponed. Temperature eases only 3°F on the high end, so you keep most of the warmth while losing the muggy, storm-prone pattern that defines August. Wind changes are minimal, rising just 0.5 mph, so conditions feel similar in pace but noticeably cleaner overall.