Alamo Weather Forecast

    • 42
    • 71

    Rain Showers

    • 21
    • 43

    Wintry Mix

    • 15
    • 34

    Slight Chance Sleet

    • 20
    • 40

    Mostly Sunny

    • 36
    • 53

    Partly Sunny

    • 32
    • 59

    Partly Sunny

Today 23 Jan Hays

Patchy fog in the morning. Cloudy with a 50 percent chance of Showers. Highs in the mid 60s. East Winds 5 to 10 Mph.

Tonight 23 Jan Hays

Cloudy with a 20 percent chance of Showers. Patchy fog. Near steady temperature in the upper 50s. Southeast Winds around 5 Mph.

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Alamo Temperature Statistics

January Temperature

San Marcos, San Marcos Municipal Airport (5 miles)

  • Lowest 18 January, 2026

    26.1 °F

  • Average January

    57 °F

  • Highest 2 January, 2026

    89.1 °F

Climate (2021–Present)

San Marcos, San Marcos Municipal Airport (5 miles)

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  • Average Low 2021–2026

    59.6 °F

  • Average 2021–2026

    70.3 °F

  • Average High 2021–2026

    82 °F
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