Williamstown Weather Forecast

    • 71
    • 85

    Severe Tstms

    • 64
    • 84

    Rain Showers Likely

    • 59
    • 79

    Mostly Sunny

    • 61
    • 81

    Partly Sunny

    • 62
    • 80

    Slight Chance Rain Showers

    • 66
    • 83

    Chance Rain Showers

    • 66
    • 86

    Chance Thunderstorms

Today 21 Jul Gloucester

Mostly cloudy. A chance of Showers and Thunderstorms this Morning, then Showers and Thunderstorms likely this afternoon. Hot with Highs in the mid 80s. South Winds 10 to 15 Mph. Chance of rain 70 percent.

Tonight 21 Jul Gloucester

Showers and Thunderstorms, mainly this evening. Some Thunderstorms may be severe with damaging Winds, large Hail, heavy Rainfall, and Tornadoes, then some Thunderstorms may produce heavy rainfall after midnight. Lows in the lower 70s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 90 percent.

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Williamstown Temperature Statistics

July Temperature

Philadelphia, Philadelphia International Airport (17.4 miles)

  • Lowest 13 July, 2026

    67.6 °F

  • Average July

    82.7 °F

  • Highest 2 July, 2026

    103.6 °F

Climate (2021–2026)

Philadelphia, Philadelphia International Airport (17.4 miles)

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  • Average Low 2021–2026

    50.2 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    67.1 °F
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