Three Mills County Park Weather Forecast

    • 39
    • 56

    Becoming Sunny

    • 48
    • 68

    Mostly Cloudy

    • 48
    • 59

    Rain Showers

    • 54
    • 72

    Rain Showers Likely

    • 53
    • 74

    Slight Chance Rain Showers

    • 54
    • 77

    Partly Sunny

Today 21 May Ontario

Becoming mostly sunny. Cool with Highs Ranging from the lower 50s on the Hilltops to the upper 50s across the lower Elevations. Northeast Winds 5 to 10 Mph, becoming north.

Tonight 21 May Ontario

Mostly cloudy. Lows in the lower 40s. Northwest Winds 5 to 10 Mph, becoming northeast.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Three Mills County Park Temperature Statistics

May Temperature

Penn Yan, Penn Yan Airport (23.6 miles)

  • Lowest 7 May, 2026

    32 °F

  • Average May

    52.7 °F

  • Highest 18 May, 2026

    90 °F

Climate (2021–Present)

Penn Yan, Penn Yan Airport (23.6 miles)

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

  • Average Low 2021–2026

    41.8 °F

  • Average 2021–2026

    50.4 °F

  • Average High 2021–2026

    59.1 °F
Get WillyWeather+ to remove ads