Olean Weather Forecast

    • 40
    • 69

    Chance Rain Showers

    • 41
    • 65

    Partly Sunny

    • 46
    • 67

    Rain Showers

    • 49
    • 60

    Rain Showers

    • 52
    • 70

    Chance Rain Showers

    • 54
    • 76

    Slight Chance Rain Showers

Today 20 May Cattaraugus

Mostly cloudy with Showers likely in the Morning, then partly sunny in the afternoon. Much cooler. Less humid with Highs in the lower 60s. Light northwest Winds. Chance of rain 70 percent.

Tonight 20 May Cattaraugus

Mostly cloudy. Lows in the upper 30s. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Olean Temperature Statistics

May Temperature

Bradford Regional Airport (22.4 miles)

  • Lowest 3 May, 2026

    25.6 °F

  • Average May

    47.7 °F

  • Highest 17 May, 2026

    77 °F

Climate (2021–Present)

Bradford Regional Airport (22.4 miles)

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  • Average Low 2021–2026

    38.8 °F

  • Average 2021–2026

    48.6 °F

  • Average High 2021–2026

    58.4 °F
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