Alamosa Weather Forecast

    • 50
    • 82

    Slight Chance Thunderstorms

    • 54
    • 84

    Slight Chance Thunderstorms

    • 51
    • 84

    Slight Chance Thunderstorms

    • 51
    • 83

    Chance Thunderstorms

    • 51
    • 83

    Chance Thunderstorms

    • 49
    • 81

    Slight Chance Thunderstorms

Today 5 Sep Alamosa Vicinity/Central San Luis Valley Below 8500 Ft

Partly sunny. A 10 percent chance of Thunderstorms in the afternoon. Highs 77 to 82. Light Winds.

Tonight 5 Sep Alamosa Vicinity/Central San Luis Valley Below 8500 Ft

Mostly cloudy. A 10 percent chance of Thunderstorms until midnight. Lows 49 to 54. Southwest Winds up to 10 Mph.

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Alamosa Temperature Statistics

September Temperature

San Luis Valley Regional Airport (1.9 miles)

  • Lowest 2 September, 2026

    42.1 °F

  • Average September

    61.9 °F

  • Highest 2 September, 2026

    82 °F

Climate (2021–2026)

San Luis Valley Regional Airport (1.9 miles)

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  • Average Low 2021–2026

    26.7 °F

  • Average 2021–2026

    45.2 °F

  • Average High 2021–2026

    63.5 °F
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