Port Allegany Weather Forecast

    • 37
    • 72

    Mostly Sunny

    • 42
    • 75

    Mostly Sunny

    • 44
    • 77

    Mostly Sunny

    • 45
    • 78

    Mostly Sunny

    • 47
    • 78

    Mostly Sunny

    • 50
    • 79

    Partly Sunny

    • 50
    • 78

    Mostly Cloudy

Today 8 Sep McKean

Mostly sunny. Highs in the upper 60s. Northwest Winds around 5 Mph.

Tonight 8 Sep McKean

Mostly clear. Patchy frost after midnight. Lows in the upper 30s. North Winds around 5 Mph, becoming east after midnight.

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Port Allegany Temperature Statistics

September Temperature

Bradford Regional Airport (18 miles)

  • Lowest 3 September, 2025

    42.1 °F

  • Average September

    58.1 °F

  • Highest 3 September, 2025

    75.9 °F

Climate (2020–Present)

Bradford Regional Airport (18 miles)

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  • Average Low 2020–2025

    39.3 °F

  • Average 2020–2025

    49 °F

  • Average High 2020–2025

    58.6 °F
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