Mack Weather Forecast

    • 57
    • 82

    Mostly Cloudy

    • 52
    • 72

    Rain Showers Likely

    • 50
    • 71

    Chance Rain Showers

    • 49
    • 76

    Mostly Sunny

    • 50
    • 79

    Mostly Sunny

    • 51
    • 79

    Mostly Sunny

Today 27 Sep Grand Valley

Mostly sunny in the Morning, then becoming mostly cloudy. Highs 75 to 85. East Winds 10 to 15 Mph in the Morning, becoming light.

Tonight 27 Sep Grand Valley

Mostly cloudy. Lows in the 50s. East Winds 10 to 15 Mph with Gusts up to 25 Mph after midnight.

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Mack Temperature Statistics

September Temperature

Grand Junction Regional Airport (18 miles)

  • Lowest 20 September, 2026

    50.6 °F

  • Average September

    72.2 °F

  • Highest 4 September, 2026

    91.7 °F

Climate (2021–2026)

Grand Junction Regional Airport (18 miles)

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  • Average Low 2021–2026

    43.8 °F

  • Average 2021–2026

    56.3 °F

  • Average High 2021–2026

    69.2 °F
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