Judith Gap Weather Forecast

    • 46
    • 69

    Rain Showers Likely

    • 44
    • 66

    Rain Showers Likely

    • 44
    • 72

    Mostly Sunny

    • 44
    • 73

    Mostly Sunny

    • 46
    • 75

    Partly Sunny

    • 50
    • 78

    Partly Sunny

Today 15 Sep Judith Gap

Mostly sunny. Cooler. Slight chance of Showers late in the Morning, then chance of Showers in the afternoon. Isolated Thunderstorms late in the afternoon. Highs in the upper 60s. Northwest Winds 10 to 20 Mph. Chance of precipitation 40 percent.

Tonight 15 Sep Judith Gap

Scattered Thunderstorms and chance of rain Showers in the Evening, then isolated Thunderstorms overnight. Rain Showers likely overnight. Patchy fog overnight. Lows in the mid 40s. North Winds 5 to 15 Mph. Chance of precipitation 60 percent.

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Judith Gap Temperature Statistics

September Temperature

Lewistown, Lewistown Municipal Airport (28.6 miles)

  • Lowest 5 September, 2025

    34 °F

  • Average September

    61.6 °F

  • Highest 2 September, 2025

    86 °F

Climate (2020–Present)

Lewistown, Lewistown Municipal Airport (28.6 miles)

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  • Average Low 2020–2025

    32.3 °F

  • Average 2020–2025

    44.4 °F

  • Average High 2020–2025

    56.3 °F
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