Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Mostly Cloudy

48°F

9°C

Humidity 63%
Wind Speed N 5 mph
Barometer 30.34 in (1026.3 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 20 Jan 2:51 am CST
Extended Forecast for

3 Miles WNW Castle Hills TX

  • Overnight

    Overnight: Mostly cloudy, with a low around 43. North northeast wind around 5 mph.

    Low: 43 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 60. North northeast wind around 5 mph becoming east southeast in the afternoon.

    High: 60 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers, mainly after 3am.  Patchy fog after 1am.  Otherwise, cloudy, with a low around 52. Southeast wind around 5 mph.

    Low: 52 °F

    Chance
    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: A 20 percent chance of showers.  Patchy fog before 8am.  Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 69. Calm wind becoming south southwest around 5 mph.

    High: 69 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53. Calm wind becoming north northeast around 5 mph.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 73. North northeast wind around 5 mph becoming southeast in the afternoon.

    High: 73 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 56. Southeast wind around 5 mph.

    Low: 56 °F

    Mostly Cloudy

  • Friday

    Friday: A 40 percent chance of showers, mainly after noon.  Cloudy, with a high near 69. East southeast wind 5 to 10 mph.

    High: 69 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Showers likely.  Cloudy, with a low around 40. Northeast wind around 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 70%.

    Low: 40 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly cloudy, with a low around 43. North northeast wind around 5 mph.
Tuesday
Mostly cloudy, with a high near 60. North northeast wind around 5 mph becoming east southeast in the afternoon.
Tuesday Night
A 30 percent chance of showers, mainly after 3am. Patchy fog after 1am. Otherwise, cloudy, with a low around 52. Southeast wind around 5 mph.
Wednesday
A 20 percent chance of showers. Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 69. Calm wind becoming south southwest around 5 mph.
Wednesday Night
Partly cloudy, with a low around 53. Calm wind becoming north northeast around 5 mph.
Thursday
Partly sunny, with a high near 73. North northeast wind around 5 mph becoming southeast in the afternoon.
Thursday Night
Mostly cloudy, with a low around 56. Southeast wind around 5 mph.
Friday
A 40 percent chance of showers, mainly after noon. Cloudy, with a high near 69. East southeast wind 5 to 10 mph.
Friday Night
Showers likely. Cloudy, with a low around 40. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Saturday
Showers likely, mainly before noon. Cloudy, with a high near 42. Chance of precipitation is 70%.
Saturday Night
A chance of rain or freezing rain. Mostly cloudy, with a low around 26. Chance of precipitation is 30%.
Sunday
Partly sunny, with a high near 40.
Sunday Night
Partly cloudy, with a low around 25.
Monday
Mostly sunny, with a high near 47.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Castle Hills TX
 29.55°N 98.56°W (Elev. 919 ft)
2:32 am CST Jan 20, 2026
3am CST Jan 20, 2026-6pm CST Jan 26, 2026
 
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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