September in Seattle, WA: shoulder season for golf — playable with smart tee time selection. Best tee times: mid-morning through early afternoon.
| Average September Weather | |
|---|---|
| Avg daily high | 70°F |
| Avg daily low | 56°F |
| Rainy days | 11 / mo |
| Avg peak wind | 11.2 mph |
Based on 10 years of climate data (2015–2024), September in Seattle, WA averages 70°F highs and 56°F lows. Expect about 11 days with measurable precipitation and peak winds averaging 11.2 mph. Our playability scoring treats wind under 8 mph as ideal, temperatures of 60–80°F as optimal, and rain probability below 20% as a green light — use these averages to gauge how often September hits those thresholds.
For Seattle in September, plan to mid-morning through early afternoon. Wind typically rises through the afternoon as thermal mixing builds, so earlier rounds tend to score higher on our playability scale.
Climate normals show the long-term picture, but day-to-day weather varies. Check today's live golf weather score for Seattle, WA for the current playability rating, hourly wind, temperature, and the recommended tee time window.
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