McDonald Observatory Weather Forecast

    • 53
    • 76

    Chance Thunderstorms

    • 52
    • 74

    Chance Thunderstorms

    • 52
    • 74

    Rain Showers Likely

    • 52
    • 73

    Rain Showers Likely

    • 53
    • 76

    Rain Showers Likely

    • 54
    • 80

    Chance Thunderstorms

Today 22 Sep Davis Mountains

Mostly cloudy. A slight chance of Showers and Thunderstorms this afternoon. Highs in the lower 80s. East Winds 10 to 20 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

Tonight 22 Sep Davis Mountains

A slight chance of Thunderstorms in the evening. Mostly cloudy with a slight chance of Showers. Lows around 60. East Winds 15 to 20 Mph with Gusts up to 35 Mph. Chance of rain 20 percent.

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  • Temperature Real-Time

McDonald Observatory Temperature Statistics

September Temperature

Alpine, Alpine-Casparis Municipal Airport (28 miles)

  • Lowest 6 September, 2026

    63.5 °F

  • Average September

    79.3 °F

  • Highest 12 September, 2026

    94.6 °F

Climate (2021–2026)

Alpine, Alpine-Casparis Municipal Airport (28 miles)

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  • Average Low 2021–2026

    52.2 °F

  • Average 2021–2026

    65.3 °F

  • Average High 2021–2026

    78.4 °F
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