Williamstown Weather Forecast

    • 31
    • 42

    Rain/Snow Likely

    • 18
    • 34

    Rain/Snow

    • 12
    • 35

    Mostly Sunny

    • 10
    • 23

    Mostly Sunny

    • 26
    • 35

    Partly Sunny

    • 18
    • 39

    Slight Chance Freezing Rain

    • 21
    • 33

    Partly Sunny

Today 17 Jan Gloucester

Mostly cloudy. A chance of snow late this Morning, then rain and snow likely this afternoon. Highs in the lower 40s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of precipitation 70 percent.

Tonight 17 Jan Gloucester

Mostly cloudy. A chance of rain after midnight. Cold. Near steady temperature in the lower 30s. Southwest Winds around 5 Mph this Evening, becoming light and variable. Chance of rain 50 percent.

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Williamstown Temperature Statistics

January Temperature

Philadelphia, Philadelphia International Airport (17.4 miles)

  • Lowest 3 January, 2026

    23 °F

  • Average January

    38.5 °F

  • Highest 7 January, 2026

    57 °F

Climate (2021–Present)

Philadelphia, Philadelphia International Airport (17.4 miles)

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  • Average Low 2021–2026

    50.2 °F

  • Average 2021–2026

    58.4 °F

  • Average High 2021–2026

    66.9 °F
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