Alexander Lake Weather Forecast

    • 35
    • 70

    Increasing Clouds

    • 28
    • 56

    Partly Sunny

    • 19
    • 42

    Mostly Sunny

    • 31
    • 53

    Mostly Sunny

    • 47
    • 60

    Mostly Cloudy

    • 48
    • 69

    Chance Rain Showers

Today 29 Jan Hays

Mostly sunny. Not as cool with Highs around 70. West Winds 10 to 15 Mph.

Tonight 29 Jan Hays

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the mid 30s. North Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Alexander Lake Temperature Statistics

January Temperature

San Marcos, San Marcos Municipal Airport (5.6 miles)

  • Lowest 27 January, 2026

    18 °F

  • Average January

    53.5 °F

  • Highest 2 January, 2026

    89.1 °F

Climate (2021–Present)

San Marcos, San Marcos Municipal Airport (5.6 miles)

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  • Average Low 2021–2026

    59.6 °F

  • Average 2021–2026

    70.3 °F

  • Average High 2021–2026

    81.9 °F
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