Great Sand Dunes National Park Weather Forecast

    • 21
    • 41

    Partly Sunny

    • 32
    • 60

    Mostly Sunny

    • 38
    • 68

    Mostly Sunny

    • 38
    • 72

    Mostly Sunny

    • 39
    • 71

    Mostly Sunny

    • 43
    • 78

    Mostly Sunny

    • 44
    • 81

    Mostly Sunny

Today 6 May Alamosa Vicinity/Central San Luis Valley Below 8500 Ft

Mostly cloudy with Periods of rain with possible snow and Thunderstorms. New snow accumulation up to 1 inch. Highs 41 to 48. Northeast Winds 10 to 15 Mph with Gusts to around 35 Mph. Chance of precipitation 90 percent.

Tonight 6 May Alamosa Vicinity/Central San Luis Valley Below 8500 Ft

Partly cloudy. Lows 16 to 23. Southeast Winds up to 10 Mph until midnight becoming light.

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Great Sand Dunes National Park Temperature Statistics

May Temperature

San Luis Valley Regional Airport (23 miles)

  • Lowest 2 May, 2026

    20.6 °F

  • Average May

    46 °F

  • Highest 3 May, 2026

    68.6 °F

Climate (2021–Present)

San Luis Valley Regional Airport (23 miles)

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  • Average Low 2021–2026

    26.8 °F

  • Average 2021–2026

    45.1 °F

  • Average High 2021–2026

    63.2 °F
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