Olney Weather Forecast

    • 63
    • 81

    Slight Chance Thunderstorms

    • 63
    • 82

    Partly Sunny

    • 68
    • 86

    Sunny

    • 73
    • 93

    Mostly Sunny

    • 70
    • 91

    Partly Sunny

    • 70
    • 89

    Slight Chance Thunderstorms

    • 68
    • 88

    Chance Thunderstorms

Today 12 Jul Central and Southeast Montgomery

Cloudy with a chance of Showers with a slight chance of Thunderstorms. Highs in the lower 80s. Southeast Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 12 Jul Central and Southeast Montgomery

Mostly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Lows in the mid 60s. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent.

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Olney Temperature Statistics

July Temperature

Gaithersburg - Montgomery County Airport (5 miles)

  • Lowest 10 July, 2026

    68 °F

  • Average July

    79.9 °F

  • Highest 4 July, 2026

    100.9 °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

    66 °F
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