Lewistown Weather Forecast

    • 45
    • 77

    Breezy

    • 27
    • 60

    Rain

    • 29
    • 52

    Partly Sunny

    • 31
    • 56

    Mostly Cloudy

    • 42
    • 60

    Mostly Cloudy

    • 27
    • 63

    Partly Sunny

Today 20 Mar Fergus County below 4500ft

Windy. Partly sunny. Highs in the upper 70s. Southwest Winds 10 to 15 Mph with Gusts to around 45 Mph increasing to west 25 to 35 Mph with Gusts to around 60 Mph in the afternoon.

Tonight 20 Mar Fergus County below 4500ft

Partly cloudy in the evening then becoming mostly cloudy. Lows 47 to 55. West Winds 15 to 20 Mph with Gusts to around 40 Mph shifting to the southwest 5 to 15 Mph after midnight.

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Lewistown Temperature Statistics

March Temperature

Lewistown, Lewistown Municipal Airport (1.2 miles)

  • Lowest 15 March, 2026

    -9.3 °F

  • Average March

    33.6 °F

  • Highest 8 March, 2026

    64.9 °F

Climate (2021–Present)

Lewistown, Lewistown Municipal Airport (1.2 miles)

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  • Average Low 2021–2026

    32.6 °F

  • Average 2021–2026

    44.9 °F

  • Average High 2021–2026

    57 °F
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