San Luis State Park Weather Forecast

    • 38
    • 67

    Chance Thunderstorms

    • 39
    • 69

    Mostly Sunny

    • 40
    • 74

    Mostly Sunny

    • 40
    • 74

    Slight Chance Thunderstorms

    • 39
    • 73

    Mostly Sunny

    • 42
    • 75

    Mostly Sunny

Today 13 Sep Alamosa Vicinity/Central San Luis Valley Below 8500 Ft

Mostly cloudy. Chance of rain Showers and slight chance of Thunderstorms in the Morning, then chance of Thunderstorms in the afternoon. Highs in the mid to upper 60s. Southwest Winds around 10 Mph. Chance of precipitation 30 percent.

Tonight 13 Sep Alamosa Vicinity/Central San Luis Valley Below 8500 Ft

Partly cloudy. A 10 percent chance of Thunderstorms until midnight. Lows 35 to 40. West Winds around 10 Mph.

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San Luis State Park Temperature Statistics

September Temperature

San Luis Valley Regional Airport (16.8 miles)

  • Lowest 9 September, 2025

    39 °F

  • Average September

    59.3 °F

  • Highest 2 September, 2025

    81 °F

Climate (2020–Present)

San Luis Valley Regional Airport (16.8 miles)

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  • Average Low 2020–2025

    26.4 °F

  • Average 2020–2025

    44.5 °F

  • Average High 2020–2025

    62.4 °F
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