Castle Heights Weather Forecast

    • 27
    • 38

    Increasing Clouds

    • 22
    • 33

    Snow Showers Likely

    • 27
    • 34

    Snow Showers Likely

    • 29
    • 41

    Chance Rain Showers

    • 26
    • 35

    Mostly Cloudy

    • 38
    • 47

    Chance Rain Showers

Today 20 Dec Ontario

Mostly sunny Early, then becoming mostly cloudy. Highs in the upper 30s. Southwest Winds 5 to 10 Mph, becoming south 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 20 Dec Ontario

Partly to mostly cloudy. Lows Ranging from the lower 20s on the Hilltops to the mid 20s across the lower Elevations. Southwest Winds 10 to 20 Mph with Gusts up to 35 Mph, becoming west.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Castle Heights Temperature Statistics

December Temperature

Penn Yan, Penn Yan Airport (15.5 miles)

  • Lowest 4 December, 2025

    3 °F

  • Average December

    25 °F

  • Highest 17 December, 2025

    46 °F

Climate (2020–Present)

Penn Yan, Penn Yan Airport (15.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    42 °F

  • Average 2020–2025

    50.5 °F

  • Average High 2020–2025

    59.2 °F
Get WillyWeather+ to remove ads