September in San Antonio, TX: variable for golf — mixed conditions — check the live score. Best tee times: tee off before 8 AM to beat the heat.
| Average September Weather | |
|---|---|
| Avg daily high | 91°F |
| Avg daily low | 73°F |
| Rainy days | 15 / mo |
| Avg peak wind | 11.1 mph |
September in San Antonio has a reputation as the month the summer finally breaks — the reality is more complicated. The high is 91°F, down just 5 degrees from August's 96°F, which means afternoon rounds still carry real heat risk. The bigger surprise is the rain. September ties March as the 3rd-wettest month of the year at 15 precip days, so that late-summer shower pattern doesn't fade the way visitors assume it will.
The upside is equally counterintuitive: September is the calmest month of the year in San Antonio, with peak wind averaging just 11.1 mph. Morning tee times can feel almost still compared to spring. The 18-degree daily swing — 91°F high dropping to a 73°F low — also means early starters get noticeably more forgiving conditions than anyone teeing off after noon. Play the calendar right and September rewards patience; play it carelessly and the heat and afternoon storms will remind you what month it actually is.
With 15 precip days concentrated in afternoon convective storms, booking a 7–8 AM tee time gives you the best chance of finishing before cells develop. September's wind is the calmest of the year, so early rounds won't just be cooler — they'll also be the flattest-air conditions you'll find in San Antonio all year. See how conditions rate hour by hour on our playability scale.
September brings 3 more rainy days than August (15 vs. 12) while cooling only 5 degrees off August's 96°F high, so the trade-off leans wet rather than comfortable. October is the clearer jump forward: a drop of 8 degrees to an 83°F high and 3 fewer precip days make it a noticeably more reliable month for scoring conditions. Wind stays nearly identical across all three months, ranging just 11.1–12.3 mph.
Climate normals show the long-term picture, but day-to-day weather varies. Check today's live golf weather score for San Antonio, TX for the current playability rating, hourly wind, temperature, and the recommended tee time window.
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It depends on when you tee off. The average high is 91°F, making it the 3rd-hottest month of the year, so midday and afternoon rounds are genuinely uncomfortable and carry heat-risk. Morning rounds starting at or before 8 AM are manageable, especially since September is the calmest month of the year with peak wind at just 11.1 mph.
Rainier than most visitors expect — September logs 15 precip days, tying March as the 3rd-wettest month of the year and adding 3 more rain days than August. The rain typically arrives as afternoon convective storms rather than all-day drizzle, so morning tee times usually avoid the worst of it, but delays and cart-path-only conditions are a real possibility.