Windham Weather Forecast

    • 60
    • 93

    Mostly Sunny

    • 56
    • 88

    Partly Sunny

    • 51
    • 78

    Slight Chance Rain Showers

    • 51
    • 77

    Mostly Sunny

    • 53
    • 80

    Mostly Sunny

    • 56
    • 84

    Mostly Sunny

Today 19 Aug Judith Basin County and Judith Gap

Sunny. Highs 90 to 95. Southwest Winds 5 to 10 Mph.

Tonight 19 Aug Judith Basin County and Judith Gap

Mostly clear. Lows around 60. South Winds 5 to 10 Mph.

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Windham Temperature Statistics

August Temperature

Lewistown, Lewistown Municipal Airport (32.3 miles)

  • Lowest 10 August, 2025

    47.6 °F

  • Average August

    66.5 °F

  • Highest 13 August, 2025

    92.6 °F

Climate (2020–Present)

Lewistown, Lewistown Municipal Airport (32.3 miles)

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  • Average Low 2020–2025

    32.2 °F

  • Average 2020–2025

    44.4 °F

  • Average High 2020–2025

    56.3 °F
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