National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Rapid Warm-Up Forecast Across Much of the Lower 48 Today and Tuesday

Most of the U.S. starts the week calm and unseasonably warm. The Heartland will be warmest, with highs 25–30° above average. Only the Gulf Coast stays chilly. Rain today is limited to western Washington while lake effect snow continues east of Lake Ontario. Cooler air returns after Tuesday, bringing a wintry mix to the Midwest and Northeast by Wednesday. Read More >

Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Overcast

49°F

9°C

Humidity 43%
Wind Speed Calm
Barometer 30.48 in (1031.4 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 12 Jan 8:51 am CST
Extended Forecast for

San Antonio TX

  • Today

    Today: Mostly cloudy, with a high near 63. Calm wind.

    High: 63 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after midnight. Cloudy, with a low around 49. Calm wind becoming south around 5 mph.

    Low: 49 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Cloudy, then gradually becoming mostly sunny, with a high near 60. West southwest wind around 5 mph.

    High: 60 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45. West southwest wind around 5 mph.

    Low: 45 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 71. West wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 71 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 41. North wind around 10 mph.

    Low: 41 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 63. North wind around 5 mph becoming south southeast in the afternoon.

    High: 63 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 41. South wind around 5 mph.

    Low: 41 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 68. Southwest wind 5 to 10 mph becoming east northeast in the afternoon.

    High: 68 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 63. Calm wind.
Tonight
A 30 percent chance of showers, mainly after midnight. Cloudy, with a low around 49. Calm wind becoming south around 5 mph.
Tuesday
Cloudy, then gradually becoming mostly sunny, with a high near 60. West southwest wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 45. West southwest wind around 5 mph.
Wednesday
Sunny, with a high near 71. West wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Clear, with a low around 41. North wind around 10 mph.
Thursday
Sunny, with a high near 63. North wind around 5 mph becoming south southeast in the afternoon.
Thursday Night
Clear, with a low around 41. South wind around 5 mph.
Friday
Sunny, with a high near 68. Southwest wind 5 to 10 mph becoming east northeast in the afternoon.
Friday Night
Partly cloudy, with a low around 43.
Saturday
Sunny, with a high near 61.
Saturday Night
Mostly clear, with a low around 39.
Sunday
Sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Antonio TX
 29.46°N 98.5°W (Elev. 741 ft)
Last Update:
9:46 am CST Jan 12, 2026
Forecast Valid:
9am CST Jan 12, 2026-6pm CST Jan 18, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation