Alamo Weather Forecast

    • 72
    • 88

    Increasing Clouds

    • 73
    • 89

    Partly Sunny

    • 74
    • 90

    Mostly Cloudy

    • 73
    • 91

    Partly Sunny

    • 73
    • 91

    Slight Chance Thunderstorms

    • 71
    • 90

    Slight Chance Thunderstorms

Today 28 May Hays

Partly cloudy in the Morning, then becoming mostly sunny. Patchy fog in the morning. Highs in the upper 80s. Southwest Winds around 5 Mph, becoming southeast around 5 Mph in the afternoon.

Tonight 28 May Hays

Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 70s. South Winds around 5 Mph.

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Alamo Temperature Statistics

May Temperature

San Marcos, San Marcos Municipal Airport (5 miles)

  • Lowest 2 May, 2026

    50 °F

  • Average May

    74 °F

  • Highest 19 May, 2026

    91.9 °F

Climate (2021–Present)

San Marcos, San Marcos Municipal Airport (5 miles)

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  • Average Low 2021–2026

    60 °F

  • Average 2021–2026

    70.7 °F

  • Average High 2021–2026

    82.4 °F
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