Octoraro Lake Weather Forecast

    • 70
    • 90

    Chance Thunderstorms

    • 63
    • 86

    Rain Showers

    • 56
    • 80

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

    • 57
    • 78

    Partly Sunny

    • 60
    • 81

    Partly Sunny

Today 3 Sep Lancaster

Partly sunny with a chance of Showers. A slight chance of Thunderstorms this Morning, then a chance of Thunderstorms this afternoon. Some Thunderstorms may produce gusty Winds, frequent Lightning, and heavy rainfall this morning. Some Thunderstorms may produce gusty Winds, frequent Lightning, and heavy rainfall this afternoon. Warmer with Highs around 90. Southwest Winds 5 to 10 Mph. Chance of rain 40 percent. Heat index Values around 100 this afternoon.

Tonight 3 Sep Lancaster

Partly cloudy in the Evening, then becoming mostly cloudy. A chance of Thunderstorms. A chance of Showers. Some Thunderstorms may produce gusty Winds, frequent Lightning, and heavy rainfall. Warm with Lows around 70. West Winds 5 to 10 Mph. Chance of rain 50 percent.

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Octoraro Lake Temperature Statistics

September Temperature

Chester County Airport (14.3 miles)

  • Lowest 1 September, 2026

    69.8 °F

  • Average September

    76.6 °F

  • Highest 1 September, 2026

    87.3 °F

Climate (2021–2026)

Chester County Airport (14.3 miles)

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  • Average Low 2021–2026

    45.8 °F

  • Average 2021–2026

    54.4 °F

  • Average High 2021–2026

    62.9 °F
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