Williamstown Weather Forecast

    • 60
    • 80

    Increasing Clouds

    • 64
    • 84

    Partly Sunny

    • 68
    • 89

    Mostly Sunny

    • 70
    • 93

    Chance Thunderstorms

    • 69
    • 89

    Chance Thunderstorms

    • 68
    • 86

    Chance Thunderstorms

Today 22 Jul Dauphin

Sunny. Highs in the lower 80s. Northeast Winds around 5 Mph.

Tonight 22 Jul Dauphin

Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 60s. East Winds around 5 Mph.

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Williamstown Temperature Statistics

July Temperature

Muir Army Air Field / Indiantown (9.9 miles)

  • Lowest 5 July, 2025

    58.3 °F

  • Average July

    77.1 °F

  • Highest 17 July, 2025

    91.9 °F

Climate (2020–Present)

Muir Army Air Field / Indiantown (9.9 miles)

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  • Average Low 2020–2025

    45.6 °F

  • Average 2020–2025

    55 °F

  • Average High 2020–2025

    64.3 °F
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