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Above Average Temperatures in the West; Winter Weather Returns to the Upper Midwest and Great Lakes

Well above average temperatures will continue across the West this week, potentially breaking some daily high temperature records. A storm system dropping south out of Canada will bring a wintry mix to the Upper Midwest and Great Lakes Tuesday, pushing into the Central Appalachians and interior Northeast on Wednesday. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

47°F

8°C

Humidity 50%
Wind Speed W 3 mph
Barometer 30.36 in (1028.0 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 13 Jan 12:56 am CST
Extended Forecast for

3 Miles WSW San Marcos TX

  • Overnight

    Overnight: A 20 percent chance of showers after 3am. Mostly cloudy, with a low around 46. Calm wind becoming west around 5 mph.

    Low: 46 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A 20 percent chance of showers before noon. Cloudy, then gradually becoming mostly sunny, with a high near 64. West southwest wind around 5 mph.

    High: 64 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44. West southwest wind around 5 mph.

    Low: 44 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 69. West wind 5 to 10 mph becoming north 15 to 20 mph in the morning. Winds could gust as high as 30 mph.

    High: 69 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 38. North wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 38 °F

    Clear

  • Thursday

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

    High: 63 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 43. South southwest wind around 5 mph.

    Low: 43 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 69. Southwest wind 5 to 10 mph becoming north in the afternoon.

    High: 69 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 41. North northeast wind 5 to 10 mph.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of showers after 3am. Mostly cloudy, with a low around 46. Calm wind becoming west around 5 mph.
Tuesday
A 20 percent chance of showers before noon. Cloudy, then gradually becoming mostly sunny, with a high near 64. West southwest wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 44. West southwest wind around 5 mph.
Wednesday
Sunny, with a high near 69. West wind 5 to 10 mph becoming north 15 to 20 mph in the morning. Winds could gust as high as 30 mph.
Wednesday Night
Clear, with a low around 38. North wind 5 to 15 mph, with gusts as high as 25 mph.
Thursday
Sunny, with a high near 63. North northwest wind around 5 mph becoming south southeast in the afternoon.
Thursday Night
Clear, with a low around 43. South southwest wind around 5 mph.
Friday
Sunny, with a high near 69. Southwest wind 5 to 10 mph becoming north in the afternoon.
Friday Night
Mostly clear, with a low around 41. North northeast wind 5 to 10 mph.
Saturday
Sunny, with a high near 63.
Saturday Night
Mostly clear, with a low around 38.
Sunday
Sunny, with a high near 63.
Sunday Night
Partly cloudy, with a low around 35.
M.L.King Day
Mostly sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW San Marcos TX
 29.86°N 97.97°W (Elev. 646 ft)
Last Update:
12:44 am CST Jan 13, 2026
Forecast Valid:
1am CST Jan 13, 2026-6pm CST Jan 19, 2026
 
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Additional Resources

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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