Grammar Airport Weather Forecast

    • 61
    • 77

    Rain Showers

    • 58
    • 79

    Rain Showers Likely

    • 54
    • 73

    Chance Rain Showers

    • 54
    • 71

    Slight Chance Rain Showers

    • 55
    • 74

    Partly Sunny

    • 57
    • 73

    Chance Thunderstorms

Today 17 Jun Ontario

Partly sunny this Morning, then a chance of Showers and Thunderstorms early this afternoon. Mostly sunny late. Highs Ranging from the lower 70s on the Hilltops to the upper 70s across the lower Elevations. South Winds 5 to 10 Mph, becoming west. Chance of rain 40 percent.

Tonight 17 Jun Ontario

Mostly cloudy. A chance of Showers in the Evening, then Showers overnight. Windy with Lows around 60. Light Winds, becoming south 20 to 30 Mph with Gusts up to 45 Mph. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grammar Airport Temperature Statistics

June Temperature

Penn Yan, Penn Yan Airport (16.2 miles)

  • Lowest 1 June, 2026

    44.1 °F

  • Average June

    67.9 °F

  • Highest 11 June, 2026

    90 °F

Climate (2021–2026)

Penn Yan, Penn Yan Airport (16.2 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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