- Book early for eclipse experience tours in 2024
- Enjoy upcoming total solar eclipse in Texas, USA
- Includes a guide by experts, itineraries & more
San Antonio weather in September 2025
Expect 90°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in San Antonio in September. Check more long-term weather averages for San Antonio in September before you book your next holiday to Texas in 2025/2026.
- 90°F max day temperature
90 - 8 hours of sunshine per day
- 7 days with some rainfall
7 - 70°F min night temperature
70 - 12 hours of daylight per day
12 - High heat & humidity
H - 3.5 inches of monthly rainfall
3.5 - 10 (Very High) UV index
10
More about San Antonio
- Overview
- Best time to visit
- Weather by month
- 5-day weather forecast
- Destinations
- Travel advice
- Deals & discounts
San Antonio by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for San Antonio
The September weather guide for Texas (San Antonio) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C) | Imperial (°F)
More about the USA
How hot is it in San Antonio in September?
Daytime temperatures usually reach 90°F in San Antonio in September with high heat and humidity, falling to 70°F at night.
How sunny is it in San Antonio in September?
There are normally 8 hours of bright sunshine each day in San Antonio in September - that's 63% of daylight hours.
Does it rain in San Antonio in September?
There are usually 7 days with some rain in San Antonio in September and the average monthly rainfall is 3.5 inches.
What is the chance of a hurricane in San Antonio in September?
On average less than 1 day in September in San Antonio is likely to be affected by the passage of one or more tropical storms.
San Antonio September sunrise & sunset times
Browse the sunrise and sunset times for San Antonio in September 2025. Select a month to view San Antonio sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Monday, 1st September 2025 | 06:12 | 18:56 |
| Monday, 15th September 2025 | 06:19 | 18:39 |
| Tuesday, 30th September 2025 | 06:27 | 18:20 |
Be inspired
Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers
We promise not to share your details
Related posts
Popular travel offers
Explore holidays in the sun for less
- Beach holidays
- Family holidays
- City breaks
- Summer holidays
- Winter sun holidays
- Holiday offers
- Top travel brands
- Airlines & flights
- Discount hotels
- Airport parking deals
- TUI
- Jet2holidays
- easyJet holidays
- Love Holidays
- Black Friday sales
Airport parking
- Manchester Airport
- Stansted Airport
- Bristol Airport
- Luton Airport
- Birmingham Airport
- Edinburgh Airport
- Gatwick Airport
- Glasgow Airport
- Newcastle Airport
Airport lounges
- Manchester Airport
- Birmingham Airport
- Bristol Airport
- Edinburgh Airport
- Glasgow Airport
- Heathrow Airport
- Newcastle Airport
- Stansted Airport
- Gatwick Airport