Olney Weather Forecast

    • 66
    • 79

    Thunderstorms

    • 66
    • 84

    Partly Sunny

    • 70
    • 89

    Mostly Sunny

    • 76
    • 97

    Hot

    • 78
    • 98

    Hot

    • 76
    • 99

    Chance Thunderstorms

    • 73
    • 96

    Chance Thunderstorms

Today 28 Jun Central and Southeast Montgomery

Mostly cloudy with scattered Showers and Thunderstorms. Highs in the lower 80s. Northeast Winds around 5 Mph. Chance of rain 50 percent.

Tonight 28 Jun Central and Southeast Montgomery

Partly cloudy with scattered Showers and Thunderstorms in the Evening, then mostly cloudy after midnight. Patchy fog after midnight. Lows in the upper 60s. East Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 50 percent.

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Olney Temperature Statistics

June Temperature

Gaithersburg - Montgomery County Airport (5 miles)

  • Lowest 2 June, 2026

    48.2 °F

  • Average June

    72.8 °F

  • Highest 11 June, 2026

    95 °F

Climate (2021–2026)

Gaithersburg - Montgomery County Airport (5 miles)

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  • Average Low 2021–2026

    46.2 °F

  • Average 2021–2026

    56 °F

  • Average High 2021–2026

    65.9 °F
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