Castle Heights Weather Forecast

    • 57
    • 79

    Rain Showers Likely

    • 55
    • 78

    Slight Chance Thunderstorms

    • 65
    • 89

    Slight Chance Thunderstorms

    • 64
    • 87

    Rain Showers Likely

    • 44
    • 76

    Rain Showers Likely

    • 43
    • 58

    Partly Sunny

    • 47
    • 65

    Partly Sunny

Today 16 May Ontario

Mostly sunny Early, then mostly cloudy with Showers with a chance of Thunderstorms late. Warm with Highs Ranging from the lower 70s on the Hilltops to the upper 70s across the lower Elevations. Southwest Winds 10 to 15 Mph. Chance of rain 80 percent.

Tonight 16 May Ontario

Mostly cloudy. Showers likely with a chance of Thunderstorms early. Mild with Lows in the upper 50s. West Winds 10 to 15 Mph, becoming light. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Castle Heights Temperature Statistics

May Temperature

Penn Yan, Penn Yan Airport (15.5 miles)

  • Lowest 7 May, 2026

    32 °F

  • Average May

    49 °F

  • Highest 4 May, 2026

    73 °F

Climate (2021–Present)

Penn Yan, Penn Yan Airport (15.5 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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