Lewis & Clark National Forest Weather Forecast

    • 39
    • 60

    Partly Sunny

    • 42
    • 57

    Partly Sunny

    • 48
    • 69

    Partly Sunny

    • 44
    • 61

    Rain Showers Likely

    • 45
    • 64

    Chance Rain Showers

    • 46
    • 67

    Mostly Sunny

Today 15 Sep Little Belt and Highwood Mountains

Not as cool. Mostly sunny. Highs 55 to 63. Southeast Winds up to 10 Mph with Gusts to around 30 Mph.

Tonight 15 Sep Little Belt and Highwood Mountains

Mostly cloudy in the evening then becoming partly cloudy. Lows 35 to 41. Southeast Winds 5 to 10 Mph shifting to the southwest after midnight. Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lewis & Clark National Forest Temperature Statistics

September Temperature

Malmstrom Air Force Base (35.4 miles)

  • Lowest 12 September, 2026

    43.5 °F

  • Average September

    62.5 °F

  • Highest 2 September, 2026

    87.7 °F

Climate (2021–2026)

Malmstrom Air Force Base (35.4 miles)

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  • Average Low 2021–2026

    36 °F

  • Average 2021–2026

    47.7 °F

  • Average High 2021–2026

    59 °F
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