San Marcos Municipal Airport Weather Forecast

    • 49
    • 57

    Chance Rain Showers

    • 41
    • 51

    Chance Rain Showers

    • 44
    • 54

    Slight Chance Rain Showers

    • 46
    • 72

    Partly Sunny

    • 38
    • 69

    Mostly Sunny

    • 37
    • 62

    Mostly Sunny

    • 44
    • 67

    Mostly Sunny

Today 3 Dec Caldwell

Cloudy with a slight chance of Showers and very light drizzle. Near steady temperature in the mid 50s. Southeast Winds around 5 Mph. Chance of rain 20 percent.

Tonight 3 Dec Caldwell

Cloudy with a chance of Showers with a slight chance of Thunderstorms. Patchy fog. Not as cool. Near steady temperature in the lower 50s. Northeast Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Marcos Municipal Airport Temperature Statistics

December Temperature

San Marcos, San Marcos Municipal Airport (0 miles)

  • Lowest 1 December, 2025

    39.9 °F

  • Average December

    42.8 °F

  • Highest 1 December, 2025

    45 °F

Climate (2020–Present)

San Marcos, San Marcos Municipal Airport (0 miles)

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  • Average Low 2020–2025

    59.4 °F

  • Average 2020–2025

    70.1 °F

  • Average High 2020–2025

    81.8 °F
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