Great Sand Dunes National Park Weather Forecast

    • 41
    • 76

    Becoming Sunny

    • 40
    • 80

    Mostly Sunny

    • 34
    • 78

    Mostly Sunny

    • 31
    • 65

    Partly Sunny

    • 35
    • 71

    Partly Sunny

    • 36
    • 71

    Mostly Cloudy

    • 38
    • 70

    Chance Rain Showers

Today 24 Mar Alamosa Vicinity/Central San Luis Valley Below 8500 Ft

Mostly sunny. Highs 74 to 79. Northwest Winds 10 to 15 Mph.

Tonight 24 Mar Alamosa Vicinity/Central San Luis Valley Below 8500 Ft

Mostly clear. Lows 33 to 38, except 37 to 48 near the Mountains. Northwest Winds 10 to 15 Mph becoming west after midnight.

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Great Sand Dunes National Park Temperature Statistics

March Temperature

San Luis Valley Regional Airport (23 miles)

  • Lowest 16 March, 2026

    9.6 °F

  • Average March

    41.9 °F

  • Highest 21 March, 2026

    83.6 °F

Climate (2021–Present)

San Luis Valley Regional Airport (23 miles)

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  • Average Low 2021–2026

    26.7 °F

  • Average 2021–2026

    45 °F

  • Average High 2021–2026

    63.1 °F
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