Gaithersburg Weather Forecast

    • 65
    • 85

    Becoming Sunny

    • 69
    • 84

    Chance Rain Showers

    • 70
    • 87

    Rain Showers

    • 62
    • 84

    Chance Thunderstorms

    • 62
    • 79

    Mostly Sunny

    • 66
    • 83

    Partly Sunny

Today 19 Jul Central and Southeast Montgomery

Mostly sunny. Highs in the mid 80s. Northwest Winds 5 to 10 Mph.

Tonight 19 Jul Central and Southeast Montgomery

Mostly clear. Lows in the mid 60s. Northeast Winds around 5 Mph.

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Gaithersburg Temperature Statistics

July Temperature

Gaithersburg - Montgomery County Airport (2.5 miles)

  • Lowest 13 July, 2026

    62.6 °F

  • Average July

    79.5 °F

  • Highest 4 July, 2026

    100.9 °F

Climate (2021–2026)

Gaithersburg - Montgomery County Airport (2.5 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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