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San Antonio, TX Weather Tomorrow

Whether you're making plans for tomorrow or later this week, the San Antonio 5 day forecast includes precipitation probability, daily and nightly weather conditions, high and low temperature trends, sunrise and sunset information, sky cover, wind speed, wind direction, and wind chill for the San Antonio area and around Bexar county, Texas.
Updated: Thu Sep 17th 2026 5:30 PM CDT
San Antonio, TX Weather – 9-17 – Overcast
91° / 76°
Overcast
Daytime highs will reach 91°F with lows dropping to 76°F in San Antonio, where skies will be overcast. There might be light rainfall having a 17% chance with an estimated 0in. Wind will be moderate, blowing around 14mph on average and gusts of 21.7mph at 10 PM. The humidity will be on the higher side, averaging about 63%, the maximum being 70% at 11 PM and 48% being its lowest at 6 PM. Barometric pressure is its highest of 30.11inHg at 10 PM, a lowest point of 30.04inHg at 6 PM with an avg 30.08inHg.
San Antonio, TX Weather – 9-18 – Overcast
96° / 76°

Weather Tomorrow

Overcast
San Antonio could see cloud-filled skies with daytime highs of 96°F and nighttime lows near 76°F. There's a very small chance of rainfall, only about 8%. Wind will be moderate, blowing around 16mph on average and gusts of 24.8mph at 5 PM. Humidity levels should be comfortable, sitting around 57% on average, the maximum being 83% at 7 AM and 31% being its lowest at 3 PM. Barometric pressure is its highest of 30.1inHg at 12 AM, a lowest point of 29.95inHg at 6 PM with an avg 30.04inHg.
San Antonio, TX Weather – 9-19 – Sunny
96° / 72°
Sunny
San Antonio is set for a sunny day with temperatures peaking at 96°F and dipping to 72°F. There's a very small chance of rainfall, only about 2%. Wind will be moderate, blowing around 15mph on average and gusts of 22.4mph at 12 AM. Humidity levels should be comfortable, sitting around 54% on average, the maximum being 78% at 7 AM and 24% being its lowest at 4 PM. Barometric pressure is its highest of 30.01inHg at 1 AM, a lowest point of 29.81inHg at 6 PM with an avg 29.93inHg.
San Antonio, TX Weather – 9-20 – Overcast
96° / 74°
Overcast
Cloud-filled skies are in the forecast for San Antonio, with a high of 96°F and a low of 74°F. There's a very small chance of rainfall, only about 6%. Wind will be moderate, blowing around 13mph on average and gusts of 21.1mph at 9 PM. Humidity levels should be comfortable, sitting around 53% on average, the maximum being 81% at 7 AM and 23% being its lowest at 5 PM. Barometric pressure is its highest of 29.94inHg at 9 AM, a lowest point of 29.74inHg at 6 PM with an avg 29.87inHg.
San Antonio, TX Weather – 9-21 – Sunny
96° / 73°
Sunny
Daytime highs will reach 96°F with lows dropping to 73°F in San Antonio, where bright and sunny conditions. There might be light rainfall having a 17% chance with an estimated 0in. Wind will be moderate, blowing around 17mph on average and gusts of 20.4mph at 10 PM. Humidity levels should be comfortable, sitting around 57% on average, the maximum being 87% at 7 AM and 26% being its lowest at 4 PM. Barometric pressure is its highest of 29.92inHg at 11 AM, a lowest point of 29.76inHg at 6 PM with an avg 29.85inHg.
San Antonio, TX Weather – 9-22 – Sunny
96° / 74°
Sunny
It will be sunny in San Antonio, with a high of 96°F and a low of 74°F. There's a very small chance of rainfall, only about 3%. Wind will be moderate, blowing around 14mph on average and gusts of 20.6mph at 10 PM. Humidity levels should be comfortable, sitting around 56% on average, the maximum being 83% at 7 AM and 27% being its lowest at 4 PM. Barometric pressure is its highest of 29.94inHg at 10 AM, a lowest point of 29.78inHg at 4 PM with an avg 29.86inHg.

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