Olean Weather Forecast

    • 54
    • 74

    Rain Showers

    • 46
    • 73

    Partly Sunny

    • 55
    • 70

    Rain Showers

    • 48
    • 69

    Chance Rain Showers

    • 47
    • 66

    Chance Rain Showers

    • 48
    • 66

    Chance Rain Showers

Today 17 Sep Cattaraugus

Showers likely through early Afternoon, then a chance of Showers late. Highs in the lower 70s. Light northwest Winds. Chance of rain 60 percent.

Tonight 17 Sep Cattaraugus

Mostly cloudy. A chance of Showers in the evening. Some patchy fog developing overnight. Cooler with Lows in the mid 50s. Light north Winds. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Olean Temperature Statistics

September Temperature

Bradford Regional Airport (22.4 miles)

  • Lowest 15 September, 2026

    39 °F

  • Average September

    64.9 °F

  • Highest 1 September, 2026

    85.6 °F

Climate (2021–2026)

Bradford Regional Airport (22.4 miles)

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  • Average Low 2021–2026

    38.7 °F

  • Average 2021–2026

    48.6 °F

  • Average High 2021–2026

    58.4 °F
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