Roy Weather Forecast

    • 18
    • 33

    Snow

    • 15
    • 25

    Chance Snow

    • 29
    • 38

    Breezy

    • 32
    • 40

    Mostly Cloudy

    • 30
    • 45

    Chance Rain/Snow

    • 29
    • 39

    Chance Snow

Today 5 Dec Fergus County below 4500ft

Partly sunny with a 20 percent chance of snow. Highs in the mid 30s. West Winds 5 to 15 Mph with Gusts to around 35 Mph shifting to the south 5 to 10 Mph in the afternoon.

Tonight 5 Dec Fergus County below 4500ft

Snow. Snow accumulation of 1 to 3 Inches. Lows around 18. Southeast Winds 5 to 10 Mph shifting to the northwest 5 to 15 Mph with Gusts to around 30 Mph after midnight. Chance of snow 90 percent.

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Roy Temperature Statistics

December Temperature

Lewistown, Lewistown Municipal Airport (30.4 miles)

  • Lowest 1 December, 2025

    12.9 °F

  • Average December

    27.9 °F

  • Highest 1 December, 2025

    34 °F

Climate (2020–Present)

Lewistown, Lewistown Municipal Airport (30.4 miles)

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  • Average Low 2020–2025

    32.4 °F

  • Average 2020–2025

    44.6 °F

  • Average High 2020–2025

    56.5 °F
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