Iron Mountain Weather Forecast

    • 52
    • 71

    Rain Showers

    • 49
    • 76

    Chance Rain Showers

    • 45
    • 72

    Rain Showers Likely

    • 43
    • 68

    Chance Thunderstorms

    • 45
    • 72

    Mostly Sunny

    • 46
    • 73

    Mostly Sunny

Today 17 Sep Central Laramie County

Mostly cloudy. Scattered Showers with isolated Thunderstorms in the Morning, then numerous Showers and scattered Thunderstorms in the afternoon. Some Thunderstorms may produce heavy rainfall in the afternoon. Highs in the lower 70s. East Winds 5 to 10 Mph, becoming south with Gusts up to 20 Mph in the afternoon. Chance of rain 70 percent.

Tonight 17 Sep Central Laramie County

Mostly cloudy. Scattered Showers in the evening. Lows in the lower 50s. West Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Iron Mountain Temperature Statistics

September Temperature

Cheyenne, Cheyenne Airport (14.9 miles)

  • Lowest 12 September, 2026

    45.6 °F

  • Average September

    69.1 °F

  • Highest 4 September, 2026

    88.6 °F

Climate (2021–2026)

Cheyenne, Cheyenne Airport (14.9 miles)

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  • Average Low 2021–2026

    36.7 °F

  • Average 2021–2026

    49.2 °F

  • Average High 2021–2026

    61.7 °F
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