McDonald Observatory Weather Forecast

    • 52
    • 75

    Partly Sunny

    • 53
    • 77

    Increasing Clouds

    • 56
    • 80

    Mostly Cloudy

    • 54
    • 75

    Slight Chance Thunderstorms

    • 53
    • 74

    Chance Thunderstorms

    • 53
    • 76

    Chance Thunderstorms

    • 54
    • 79

    Chance Thunderstorms

Today 2 Sep Davis Mountains

Sunny. Highs in the lower 80s. East Winds around 10 Mph with Gusts up to 25 Mph.

Tonight 2 Sep Davis Mountains

Partly cloudy. Lows in the upper 50s. East Winds 5 to 10 Mph.

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McDonald Observatory Temperature Statistics

September Temperature

Alpine, Alpine-Casparis Municipal Airport (28 miles)

  • Lowest

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  • Average September

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Climate (2020–Present)

Alpine, Alpine-Casparis Municipal Airport (28 miles)

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  • Average Low 2020–2025

    51.3 °F

  • Average 2020–2025

    64.5 °F

  • Average High 2020–2025

    77.7 °F
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