Monarch Weather Forecast

    • 44
    • 71

    Mostly Sunny

    • 45
    • 74

    Mostly Sunny

    • 47
    • 76

    Partly Sunny

    • 49
    • 74

    Partly Sunny

    • 44
    • 67

    Mostly Sunny

    • 46
    • 70

    Mostly Sunny

Today 17 Sep Little Belt and Highwood Mountains

Sunny. Patchy fog in the morning. Highs 60 to 70. East Winds up to 10 Mph.

Tonight 17 Sep Little Belt and Highwood Mountains

Mostly clear. Lows 40 to 50. Southeast Winds up to 10 Mph shifting to the south after midnight.

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Monarch Temperature Statistics

September Temperature

Malmstrom Air Force Base (31.7 miles)

  • Lowest 5 September, 2025

    39.4 °F

  • Average September

    65.9 °F

  • Highest 3 September, 2025

    86.2 °F

Climate (2020–Present)

Malmstrom Air Force Base (31.7 miles)

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  • Average Low 2020–2025

    35.4 °F

  • Average 2020–2025

    47 °F

  • Average High 2020–2025

    58 °F
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