Collegeville Weather Forecast

    • 61
    • 71

    Chance Thunderstorms

    • 57
    • 82

    Mostly Sunny

    • 55
    • 85

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

    • 56
    • 77

    Partly Sunny

    • 59
    • 79

    Partly Sunny

    • 60
    • 83

    Partly Sunny

Today 17 Sep Western Montgomery

Cloudy with a chance of Thunderstorms. A chance of Showers late this Morning, then Showers likely this afternoon. Highs in the upper 60s. Northeast Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 70 percent.

Tonight 17 Sep Western Montgomery

Mostly cloudy. A chance of Showers and Thunderstorms this Evening, then a slight chance of Showers after midnight. Areas of fog. Lows in the lower 60s. Northeast Winds 5 to 10 Mph. Chance of rain 40 percent.

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Collegeville Temperature Statistics

September Temperature

Pottstown, Pottstown Limerick Airport (6.2 miles)

  • Lowest 8 September, 2025

    46.9 °F

  • Average September

    67.9 °F

  • Highest 4 September, 2025

    84 °F

Climate (2020–Present)

Pottstown, Pottstown Limerick Airport (6.2 miles)

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  • Average Low 2020–2025

    44.8 °F

  • Average 2020–2025

    54.7 °F

  • Average High 2020–2025

    64.6 °F
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