Grammar Airport Weather Forecast

    • 32
    • 48

    Becoming Sunny

    • 52
    • 58

    Chance Rain Showers

    • 56
    • 69

    Chance Rain Showers

    • 60
    • 72

    Chance Thunderstorms

    • 56
    • 77

    Chance Rain Showers

    • 51
    • 69

    Chance Rain Showers

Today 11 Apr Ontario

Mostly cloudy in the Morning, then clearing. Much cooler with Highs Ranging from the mid 40s on the Hilltops to the upper 40s across the lower Elevations. Northwest Winds 5 to 10 Mph.

Tonight 11 Apr Ontario

Mainly clear. Lows in the lower 30s. Northwest Winds 10 Mph or less.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grammar Airport Temperature Statistics

April Temperature

Penn Yan, Penn Yan Airport (16.2 miles)

  • Lowest 8 April, 2026

    18 °F

  • Average April

    42.2 °F

  • Highest 4 April, 2026

    70 °F

Climate (2021–Present)

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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