Octoraro Lake Weather Forecast

    • 61
    • 79

    Thunderstorms

    • 64
    • 78

    Rain Showers Likely

    • 64
    • 78

    Rain Showers Likely

    • 60
    • 80

    Chance Thunderstorms

    • 59
    • 77

    Mostly Sunny

    • 61
    • 78

    Partly Sunny

Today 20 Aug Lancaster

Partly sunny with a chance of Showers with a slight chance of Thunderstorms this Morning, then Showers with a chance of Thunderstorms this afternoon. Some Thunderstorms may produce gusty Winds and heavy Rainfall, then some Thunderstorms may produce damaging Winds and heavy rainfall this afternoon. Locally heavy rainfall possible this afternoon. Highs in the upper 70s. East Winds 5 to 10 Mph. Chance of rain near 100 percent.

Tonight 20 Aug Lancaster

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms in the evening. Some Thunderstorms may be severe with damaging Winds and heavy rainfall. Humid with Lows in the lower 60s. North Winds 5 to 10 Mph. Chance of rain 50 percent.

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Octoraro Lake Temperature Statistics

August Temperature

Chester County Airport (14.3 miles)

  • Lowest 4 August, 2026

    63.9 °F

  • Average August

    75.2 °F

  • Highest 9 August, 2026

    87.6 °F

Climate (2021–2026)

Chester County Airport (14.3 miles)

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    54.5 °F

  • Average High 2021–2026

    63 °F
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