San Antonio · AutumnMonth summary
San Antonio weather in September
✅ Good
🌡️ Temperature min / max
73°F – 91°F
🌧 Rainy days
32% of days
☀️ Sunshine
11.2h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
7.3/10
📅 📅 Best month
October (8.3/10)
Quick decision
Should you visit San Antonio in September?
✅ Good
✅ Yes if: you want shoulder-season value — fewer crowds, 33°F.
❌ No if: you need maximum sunshine — some overcast days are possible.
Our take: Favourable conditions in September (7.3/10). October scores higher but the gap is small.
By trip type
San Antonio in September by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ⚠️ Possible
- 🏖️ Beach / swimming : — No sea access
- 💰 💰 Budget : ✅ Low season
Local context
What to expect in September
Autumn in San Antonio is often underrated: 33°F, golden light and declining crowds. An interesting window. Expect rain on 32% of days — a light raincoat in the bag is recommended. Not the best window, but acceptable if dates are constrained. October (8.3/10) is significantly better if possible.
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All months for San Antonio
Annual table
Month-by-month comparison
| Month | Min °F | Max °F | Rain % | Precip in | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌤️ January | 43°F | 64°F | 25% | 0.1in | 9.7h | 7.2/10 |
| 🌤️ February | 48°F | 70°F | 26% | 0.1in | 8.1h | 7.4/10 |
| 🌤️ March | 57°F | 79°F | 32% | 0.1in | 8.8h | 7.8/10 |
| 🌤️ April | 63°F | 82°F | 37% | 0.1in | 10.0h | 8.0/10 |
| 🌤️ May | 70°F | 86°F | 47% | 0.2in | 11.0h | 7.5/10 |
| 🌤️ June | 75°F | 93°F | 36% | 0.1in | 12.4h | 7.2/10 |
| 🥵 July | 77°F | 97°F | 25% | 0.1in | 12.9h | 6.9/10 |
| 🥵 August | 77°F | 97°F | 26% | 0.1in | 12.6h | 6.9/10 |
| 🌤️ September | 73°F | 91°F | 32% | 0.1in | 11.2h | 7.3/10 |
| 🌤️ October | 66°F | 84°F | 25% | 0.1in | 10.7h | 8.3/10 |
| 🌤️ November | 55°F | 75°F | 29% | 0.1in | 8.4h | 7.7/10 |
| 🌤️ December | 48°F | 68°F | 25% | 0.1in | 7.8h | 7.3/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In September, San Antonio averages 91°F, 32% rainy days and 11.2h of sunshine per day. Overall weather score: 7.3/10.
See methodology →
Comparison
September vs October (best month)
The best month is October (score 8.3/10). Difference:
- 🌡️ Max temperature : -4°F
- 🌧 Rainy days : -7%
- ☀️ Sunshine : -0.5h/day
FAQ
FAQ — San Antonio in September
Is September a good time to visit San Antonio?
September is an acceptable time for San Antonio (score 7.3/10). Conditions are decent but not optimal — consider October (8.3/10) if possible.
What to do in San Antonio in September?
With 91°F max and 11.2h of sunshine, focus on cultural sites, museums and local gastronomy.
Accommodation
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