Great Sand Dunes National Park Weather Forecast

    • 53
    • 84

    Slight Chance Thunderstorms

    • 52
    • 83

    Chance Thunderstorms

    • 50
    • 80

    Chance Thunderstorms

    • 47
    • 81

    Slight Chance Thunderstorms

    • 48
    • 83

    Mostly Sunny

    • 50
    • 84

    Partly Sunny

    • 52
    • 84

    Partly Sunny

Today 29 Aug Alamosa Vicinity/Central San Luis Valley Below 8500 Ft

Partly sunny with a 20 percent chance of Thunderstorms. Highs 79 to 85. Southwest Winds 10 to 15 Mph.

Tonight 29 Aug Alamosa Vicinity/Central San Luis Valley Below 8500 Ft

Mostly cloudy with a 20 percent chance of Thunderstorms. Lows 50 to 55. Southwest Winds around 10 Mph.

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Great Sand Dunes National Park Temperature Statistics

August Temperature

San Luis Valley Regional Airport (23 miles)

  • Lowest 24 August, 2026

    40.6 °F

  • Average August

    68.5 °F

  • Highest 4 August, 2026

    93.7 °F

Climate (2021–2026)

San Luis Valley Regional Airport (23 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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