Mount Vernon Weather Forecast

    • 59
    • 89

    Slight Chance Thunderstorms

    • 57
    • 87

    Chance Thunderstorms

    • 52
    • 79

    Chance Rain Showers

    • 54
    • 85

    Partly Sunny

    • 57
    • 87

    Partly Sunny

    • 57
    • 85

    Mostly Cloudy

Today 2 Aug John Day Basin

Sunny. Highs in the mid 80s to lower 90s. Light Wind, becoming northwest 5 to 10 Mph in the afternoon.

Tonight 2 Aug John Day Basin

Partly cloudy. Lows in the mid 50s to lower 60s. Northwest wind 5 to 10 Mph in the Evening, becoming light.

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Mount Vernon Temperature Statistics

August Temperature

Grant County Regional Airport (6.8 miles)

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Climate (2020–Present)

Grant County Regional Airport (6.8 miles)

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  • Average Low 2020–2025

    39.1 °F

  • Average 2020–2025

    50.4 °F

  • Average High 2020–2025

    62.3 °F
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