September in San Jose, CA: peak season for golf — great conditions and a wide playing window. Best tee times: morning before noon for the most comfortable round.
| Average September Weather | |
|---|---|
| Avg daily high | 84°F |
| Avg daily low | 59°F |
| Rainy days | 4 / mo |
| Avg peak wind | 13 mph |
September sits between San Jose's two hottest months and the wetter stretch of fall, which makes it one of the more interesting transitions on the local golf calendar. Highs average 84°F — third-hottest of the year — while lows drop to 59°F, a 25-degree daily swing that means a morning round can feel noticeably cool before conditions warm up fast by midday.
Precip days rise to 4, still third-driest on the annual calendar, so rain rarely derails a round. Peak winds clock in at 13 mph, slightly calmer than August's 14.3 mph. The heat is manageable but real; afternoon rounds in the low-to-mid 80s require honest hydration planning, especially on exposed layouts in the South Bay's open parkland settings.
Book morning tee times — before 9 AM if possible — to take advantage of the cooler 59°F starts before afternoon temps climb into the low-to-mid 80s. Weekends fill quickly in peak season, so aim to secure a slot at least 7–10 days out, particularly for popular public-access courses like Cinnabar Hills or Coyote Creek. See how conditions rate hour by hour on our playability scale.
Compared to August, September drops just 2°F on the average high and sheds 1.3 mph of peak wind, but jumps from 1 precip day to 4 — the most meaningful shift coming in. Heading into October, the cooling accelerates with a 6°F drop in the high and 3°F off the low, wind eases another 1.8 mph, and precip days tick up by 2 more. In practical terms, September is the last month where heat management matters more than rain planning.
Climate normals show the long-term picture, but day-to-day weather varies. Check today's live golf weather score for San Jose, CA for the current playability rating, hourly wind, temperature, and the recommended tee time window.
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Afternoon highs average 84°F, which is above the 60–80°F ideal comfort range but not extreme. Morning rounds starting around 6–7 AM are genuinely comfortable, with temperatures near 59°F at dawn. If you are sensitive to heat, simply avoid post-noon tee times and keep hydration front of mind.
September averages 4 precipitation days, making it the third-driest month of the year — rain is possible but unlikely to cancel a round. That said, the month has three more precip days than August, so a quick weather check the night before is worth the habit.