Seneca Castle Weather Forecast

    • 19
    • 27

    Increasing Clouds

    • 22
    • 36

    Mostly Cloudy

    • 15
    • 31

    Chance Snow

    • 7
    • 20

    Mostly Cloudy

    • 26
    • 31

    Chance Rain/Snow

    • 26
    • 39

    Rain/Snow

Today 5 Dec Ontario

Mostly sunny and cold with Highs Ranging from the mid 20s on the Hilltops to the upper 20s across the lower Elevations. Light south Winds.

Tonight 5 Dec Ontario

Partly to mostly cloudy. Lows around 20. Light Winds, becoming south 5 to 10 Mph.

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Seneca Castle Temperature Statistics

December Temperature

Penn Yan, Penn Yan Airport (16.8 miles)

  • Lowest 3 December, 2025

    17.1 °F

  • Average December

    27.1 °F

  • Highest 1 December, 2025

    34 °F

Climate (2020–Present)

Penn Yan, Penn Yan Airport (16.8 miles)

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  • Average Low 2020–2025

    42 °F

  • Average 2020–2025

    50.6 °F

  • Average High 2020–2025

    59.2 °F
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