Lewistown Weather Forecast

    • 50
    • 71

    Chance Rain Showers

    • 41
    • 64

    Decreasing Clouds

    • 39
    • 60

    Mostly Sunny

    • 54
    • 66

    Rain Showers

    • 45
    • 67

    Chance Rain Showers

    • 47
    • 65

    Partly Sunny

    • 55
    • 72

    Slight Chance Rain Showers

Today 9 May Logan

Mostly cloudy with a chance of Showers this Morning, then partly cloudy with a chance of Showers and Thunderstorms this afternoon. Highs around 70. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 40 percent.

Tonight 9 May Logan

Partly cloudy. A chance of Showers with a slight chance of Thunderstorms this Evening, then a chance of Showers after midnight. Lows in the upper 40s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph, becoming northwest 5 to 10 Mph after Midnight, then becoming north late. Chance of rain 50 percent.

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Lewistown Temperature Statistics

May Temperature

Bellefontaine Regional Airport (4.3 miles)

  • Lowest 2 May, 2026

    32 °F

  • Average May

    49.6 °F

  • Highest 4 May, 2026

    75.2 °F

Climate (2021–Present)

Bellefontaine Regional Airport (4.3 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    55.8 °F

  • Average High 2021–2026

    64.6 °F
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