Olney Weather Forecast

    • 60
    • 85

    Partly Sunny

    • 60
    • 81

    Mostly Cloudy

    • 60
    • 73

    Chance Rain Showers

    • 60
    • 71

    Chance Rain Showers

    • 61
    • 79

    Slight Chance Thunderstorms

    • 63
    • 84

    Partly Sunny

Today 14 Sep Central and Southeast Montgomery

Sunny. Highs in the mid 80s. Light and variable Winds, becoming northeast around 5 Mph in the afternoon.

Tonight 14 Sep Central and Southeast Montgomery

Partly cloudy in the Evening, then becoming mostly clear. Lows in the lower 60s. East Winds around 5 Mph in the Evening, becoming light and variable.

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Olney Temperature Statistics

September Temperature

Gaithersburg - Montgomery County Airport (5 miles)

  • Lowest 9 September, 2025

    48.2 °F

  • Average September

    66.9 °F

  • Highest 6 September, 2025

    89.1 °F

Climate (2020–Present)

Gaithersburg - Montgomery County Airport (5 miles)

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  • Average Low 2020–2025

    46.3 °F

  • Average 2020–2025

    56 °F

  • Average High 2020–2025

    65.9 °F
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