Tarentum Weather Forecast

    • 55
    • 85

    Mostly Sunny

    • 57
    • 85

    Mostly Sunny

    • 60
    • 85

    Partly Sunny

    • 61
    • 85

    Partly Sunny

    • 61
    • 85

    Chance Rain Showers

    • 60
    • 83

    Chance Rain Showers

Today 18 Sep Allegheny

Sunny, warm with Highs in the mid 80s. Light and variable Winds, becoming northwest around 5 Mph this afternoon.

Tonight 18 Sep Allegheny

Clear. Lows in the mid 50s. Northwest Winds around 5 Mph in the Evening, becoming light and variable.

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Tarentum Temperature Statistics

September Temperature

Butler, Butler County Airport/K W Scholter Field (15.5 miles)

  • Lowest 8 September, 2025

    39 °F

  • Average September

    63.1 °F

  • Highest 3 September, 2025

    82.9 °F

Climate (2020–Present)

Butler, Butler County Airport/K W Scholter Field (15.5 miles)

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  • Average Low 2020–2025

    42.1 °F

  • Average 2020–2025

    51.4 °F

  • Average High 2020–2025

    60.6 °F
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