Gaithersburg Weather Forecast

    • 73
    • 99

    Severe Tstms

    • 70
    • 92

    Rain Showers

    • 68
    • 85

    Rain Showers

    • 68
    • 83

    Chance Thunderstorms

    • 69
    • 86

    Chance Rain Showers

    • 71
    • 89

    Chance Thunderstorms

Today 4 Jul Central and Southeast Montgomery

Sunny. Numerous Showers and Thunderstorms this afternoon. Some Thunderstorms may be severe with damaging Winds and heavy rainfall. Hot with Highs in the upper 90s. West Winds 5 to 10 Mph. Chance of rain 70 percent. Heat index Values up to 111 this afternoon.

Tonight 4 Jul Central and Southeast Montgomery

Mostly cloudy. Numerous Showers and Thunderstorms in the Evening, then scattered Showers with isolated Thunderstorms after midnight. Some Thunderstorms may be severe with damaging Winds and heavy rainfall in the evening. Lows in the lower 70s. West Winds around 5 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Gaithersburg Temperature Statistics

July Temperature

Gaithersburg - Montgomery County Airport (2.5 miles)

  • Lowest 1 July, 2026

    73.9 °F

  • Average July

    85.5 °F

  • Highest 2 July, 2026

    99 °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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