Tionesta Lake Weather Forecast

    • 55
    • 81

    Mostly Sunny

    • 55
    • 82

    Mostly Sunny

    • 53
    • 81

    Mostly Sunny

    • 53
    • 79

    Partly Sunny

    • 54
    • 82

    Mostly Sunny

    • 52
    • 81

    Partly Sunny

    • 53
    • 78

    Chance Rain Showers

Today 14 Sep Forest

Mostly sunny. Highs in the lower 80s. North Winds around 5 Mph.

Tonight 14 Sep Forest

Clear. Lows in the mid 50s. Northeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tionesta Lake Temperature Statistics

September Temperature

Franklin, Venango Regional Airport (23.6 miles)

  • Lowest 8 September, 2025

    39.9 °F

  • Average September

    60.3 °F

  • Highest 3 September, 2025

    81 °F

Climate (2020–Present)

Franklin, Venango Regional Airport (23.6 miles)

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  • Average Low 2020–2025

    40.7 °F

  • Average 2020–2025

    49.3 °F

  • Average High 2020–2025

    58.1 °F
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