Lake Wilhelm Weather Forecast

    • 66
    • 81

    Mostly Cloudy

    • 67
    • 85

    Rain Showers

    • 54
    • 76

    Chance Rain Showers

    • 55
    • 75

    Mostly Sunny

    • 63
    • 80

    Slight Chance Rain Showers

    • 61
    • 80

    Chance Rain Showers

Today 8 Sep Mercer

Partly sunny. Near steady temperature around 80. Southwest Winds around 5 Mph.

Tonight 8 Sep Mercer

Partly cloudy in the Evening, then becoming mostly cloudy. Warm with Lows in the mid 60s. Southeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Wilhelm Temperature Statistics

September Temperature

Franklin, Venango Regional Airport (13.7 miles)

  • Lowest 6 September, 2026

    52 °F

  • Average September

    70.6 °F

  • Highest 2 September, 2026

    87.1 °F

Climate (2021–2026)

Franklin, Venango Regional Airport (13.7 miles)

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  • Average Low 2021–2026

    40.7 °F

  • Average 2021–2026

    49.4 °F

  • Average High 2021–2026

    58.2 °F
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