Seneca Castle Weather Forecast

    • 49
    • 71

    Increasing Clouds

    • 47
    • 67

    Mostly Sunny

    • 49
    • 69

    Partly Sunny

    • 51
    • 71

    Mostly Sunny

    • 57
    • 78

    Partly Sunny

    • 59
    • 82

    Chance Rain Showers

Today 31 May Ontario

Mostly sunny. Highs Ranging from the mid 60s on the Hilltops to the lower 70s across the lower Elevations. Light Winds, becoming northwest 10 to 15 Mph.

Tonight 31 May Ontario

Becoming mainly clear. Lows in the upper 40s. West Winds 10 Mph or less.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Seneca Castle Temperature Statistics

May Temperature

Penn Yan, Penn Yan Airport (16.8 miles)

  • Lowest 7 May, 2026

    32 °F

  • Average May

    55.4 °F

  • Highest 18 May, 2026

    90 °F

Climate (2021–Present)

Penn Yan, Penn Yan Airport (16.8 miles)

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  • Average Low 2021–2026

    41.8 °F

  • Average 2021–2026

    50.4 °F

  • Average High 2021–2026

    59.1 °F
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