Grammar Airport Weather Forecast

    • 64
    • 80

    Decreasing Clouds

    • 60
    • 82

    Rain Showers

    • 52
    • 75

    Mostly Sunny

    • 56
    • 78

    Mostly Sunny

    • 65
    • 83

    Partly Sunny

    • 66
    • 84

    Chance Rain Showers

Today 26 Aug Ontario

Some patchy fog Early, otherwise mostly sunny. Highs Ranging from the mid 70s on the Hilltops to the lower 80s across the lower Elevations. Light south Winds.

Tonight 26 Aug Ontario

Becoming mainly clear. Lows in the mid 60s. Light Winds, becoming south 5 to 10 Mph.

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Grammar Airport Temperature Statistics

August Temperature

Penn Yan, Penn Yan Airport (16.2 miles)

  • Lowest 20 August, 2026

    55 °F

  • Average August

    70 °F

  • Highest 5 August, 2026

    88 °F

Climate (2021–2026)

Penn Yan, Penn Yan Airport (16.2 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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