Lewistown Weather Forecast

    • 48
    • 66

    Decreasing Clouds

    • 47
    • 69

    Mostly Sunny

    • 48
    • 69

    Mostly Sunny

    • 50
    • 69

    Mostly Sunny

    • 57
    • 70

    Partly Sunny

    • 62
    • 74

    Chance Rain Showers

Today 25 Sep Logan

Mostly sunny in the Morning, then becoming partly cloudy. Highs in the mid 60s. Northeast Winds 5 to 10 Mph.

Tonight 25 Sep Logan

Partly cloudy. Lows in the upper 40s. Northeast Winds 5 to 10 Mph.

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Lewistown Temperature Statistics

September Temperature

Bellefontaine Regional Airport (4.3 miles)

  • Lowest 14 September, 2026

    50 °F

  • Average September

    72 °F

  • Highest 3 September, 2026

    95 °F

Climate (2021–2026)

Bellefontaine Regional Airport (4.3 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    55.7 °F

  • Average High 2021–2026

    64.4 °F
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