Olean Weather Forecast

    • 50
    • 79

    Decreasing Clouds

    • 53
    • 81

    Mostly Sunny

    • 40
    • 72

    Partly Sunny

    • 51
    • 76

    Partly Sunny

    • 54
    • 80

    Partly Sunny

    • 55
    • 81

    Partly Sunny

Today 17 Sep Cattaraugus

Some patchy fog in the Morning, otherwise partly to mostly sunny. Highs in the upper 70s. Light south Winds.

Tonight 17 Sep Cattaraugus

Mainly Clear, then becoming partly cloudy with some patchy fog developing late. Lows in the lower 50s. Light southeast Winds.

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Olean Temperature Statistics

September Temperature

Bradford Regional Airport (22.4 miles)

  • Lowest 8 September, 2025

    34 °F

  • Average September

    56.6 °F

  • Highest 14 September, 2025

    78.1 °F

Climate (2020–Present)

Bradford Regional Airport (22.4 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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