Olney Weather Forecast

    • 50
    • 74

    Rain Showers

    • 48
    • 63

    Partly Sunny

    • 53
    • 71

    Partly Sunny

    • 62
    • 83

    Partly Sunny

    • 64
    • 84

    Partly Sunny

    • 66
    • 87

    Partly Sunny

Today 13 May Central and Southeast Montgomery

Partly sunny with a chance of Showers and Thunderstorms. Highs in the mid 70s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

Tonight 13 May Central and Southeast Montgomery

Showers with a chance of Thunderstorms in the Evening, then a chance of Showers after midnight. Lows in the lower 50s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming northwest after midnight. Chance of rain near 100 percent.

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Olney Temperature Statistics

May Temperature

Gaithersburg - Montgomery County Airport (5 miles)

  • Lowest 1 May, 2026

    37.4 °F

  • Average May

    59 °F

  • Highest 5 May, 2026

    84 °F

Climate (2021–Present)

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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