Octoraro Lake Weather Forecast

    • 50
    • 59

    Rain Showers Likely

    • 46
    • 62

    Rain

    • 48
    • 56

    Rain

    • 55
    • 68

    Chance Rain Showers

    • 58
    • 69

    Rain Showers Likely

    • 58
    • 74

    Slight Chance Thunderstorms

    • 58
    • 80

    Mostly Cloudy

Today 21 May Lancaster

Rain. Much cooler. Near steady temperature in the mid 50s. Northeast Winds 5 to 10 Mph. Chance of rain near 100 percent.

Tonight 21 May Lancaster

Cloudy. Light rain likely this Evening, then a slight chance of rain after midnight. Lows in the lower 50s. Northeast Winds around 5 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Octoraro Lake Temperature Statistics

May Temperature

Chester County Airport (14.3 miles)

  • Lowest 1 May, 2026

    36.7 °F

  • Average May

    60.4 °F

  • Highest 19 May, 2026

    92.1 °F

Climate (2021–Present)

Chester County Airport (14.3 miles)

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    54.4 °F

  • Average High 2021–2026

    63 °F
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