September in Charleston, SC: variable for golf — mixed conditions — check the live score. Best tee times: morning before noon for the most comfortable round.
| Average September Weather | |
|---|---|
| Avg daily high | 83°F |
| Avg daily low | 72°F |
| Rainy days | 18 / mo |
| Avg peak wind | 12.8 mph |
Rain is the single variable that makes or breaks golf in Charleston in September. With 18 precipitation days on average, it ranks as the 4th-wettest month of the year here — and that single fact shapes every round you'll plan. Heat is still present, with an average high of 83°F and a low of 72°F, meaning conditions feel closer to summer than fall. The daily swing is only 11°F, so there's no cool morning relief to take advantage of.
What September does offer over August is fewer total rain days — down seven from August's 25 — and temperatures that are slightly more manageable. Afternoon storms remain the dominant pattern, so morning tee times are not just preferable, they're practically mandatory. Wind averages 12.8 mph at peak, modest enough that it won't punish you on its own, but combine that with wet fairways and summer humidity and the "Variable" tier badge this page shows is well earned.
With 18 rain days spread across the month, book the earliest available tee time — 6 or 7 AM — to stay ahead of the afternoon convective storms that typically build once the sea breeze pushes inland and daytime heating peaks, usually by early-to-mid afternoon. Flexibility matters too: check the short-range forecast (24–48 hours out) before committing, since the sea-breeze trigger that sets off these storms can shift the onset window by an hour or more from day to day. See how conditions rate hour by hour on our playability scale.
September sheds seven rain days compared to August (25 days) and drops the average high by 3°F, making it a marginal improvement for golfers willing to work around showers. The real payoff comes in October, which cuts rain days by another eight (down to 10) and drops the high by 7°F to a much more comfortable 76°F. Wind is essentially flat across all three months, ranging only from 11.6 to 12.8 mph, so precipitation — not wind — is what separates them.
Climate normals show the long-term picture, but day-to-day weather varies. Check today's live golf weather score for Charleston, SC for the current playability rating, hourly wind, temperature, and the recommended tee time window.
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September averages 18 precipitation days, making it the 4th-wettest month of the year in Charleston — meaning rain affects more than half the days in the month. Most of it falls as afternoon convective storms, so early tee times significantly reduce your exposure. Courses can drain quickly after a shower, but multiple wet days in a row can leave fairways soft throughout the month.
At an average high of 83°F and a low of 72°F, September is still firmly in summer territory — it's the 4th-hottest month of the year by average high. The daily temperature swing is only 11°F, which means there's no real cool window later in the day to exploit. Morning rounds before 10 AM are the most tolerable, but expect heat and humidity to be a factor for the full round even then.