Jefferson Memorial Park Weather Forecast

    • 64
    • 82

    Chance Thunderstorms

    • 58
    • 77

    Decreasing Clouds

    • 52
    • 72

    Partly Sunny

    • 51
    • 71

    Mostly Sunny

    • 55
    • 75

    Partly Sunny

    • 59
    • 75

    Mostly Cloudy

    • 65
    • 80

    Chance Rain Showers

Today 3 Sep Ontario

Mostly cloudy. A chance of Showers and Thunderstorms late. Highs Ranging from the mid 70s on the Hilltops to the lower 80s across the lower Elevations. Light northwest Winds. Chance of rain 30 percent.

Tonight 3 Sep Ontario

Mostly cloudy. Showers likely with a chance of Thunderstorms late this Evening, then a chance of Showers. Some patchy fog developing late. Lows in the mid 60s. Light west Winds. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Jefferson Memorial Park Temperature Statistics

September Temperature

Penn Yan, Penn Yan Airport (19.9 miles)

  • Lowest 1 September, 2026

    68 °F

  • Average September

    73.5 °F

  • Highest 1 September, 2026

    82.9 °F

Climate (2021–2026)

Penn Yan, Penn Yan Airport (19.9 miles)

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  • Average Low 2021–2026

    41.7 °F

  • Average 2021–2026

    50.3 °F

  • Average High 2021–2026

    59 °F
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