See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
26°
Drizzle and Humid
Feels Like: 26°
Min: 25°
Max: 31°
The next few hours will be partly cloudy, with tomorrow reaching 30°C and dropping to 24°C. The coming days will be drizzle
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
05:48
Sunrise
17:52
Sunset
Moon
Waxing Crescent
09:58
Moonrise
21:24
Moonset
Daily Forecast
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Thursday
Friday
Saturday
Sunday
Monday
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Friday
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Weather in San Antonio tomorrow, September 17, 2026
Rain features in San Antonio on September 17, 2026, so keep waterproofs handy through the day. The damp theme is strongest where shower chances rise. Early hours look the most unsettled, with rain probability near 66% by 09:00. The thickest cloud arrives around 00:00, reaching about 89%.
The day peaks near 30°C and cools toward 24°C. Moisture in the air spans 76%-99%, with the highest values around 02:00. Winds stay light, near 1.8 km/h by 14:00, so the day feels still more than breezy.
Through the afternoon wet weather remains a factor, with rain chances near 98% around 15:00. Cloud also stays substantial, close to 91% near 19:00. Horizontal visibility sits around 15.9 km, briefly nearer 13.3 km. Sunrise is at 05:48 and sunset at 17:51, giving 12 hours 3 minutes of sunlight today.
Overall, San Antonio on September 17, 2026 suits indoor plans or waterproof kit, especially while rain chances stay near 98% and the high sits around 30°C.
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