Potomac Weather Forecast

    • 69
    • 87

    Decreasing Clouds

    • 73
    • 91

    Mostly Sunny

    • 76
    • 97

    Slight Chance Thunderstorms

    • 74
    • 94

    Chance Thunderstorms

    • 73
    • 91

    Rain Showers Likely

    • 73
    • 91

    Chance Rain Showers

Today 23 Jul Central and Southeast Montgomery

Mostly sunny. Highs in the mid 80s. Southeast Winds around 5 Mph.

Tonight 23 Jul Central and Southeast Montgomery

Mostly clear. Lows in the upper 60s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac Temperature Statistics

July Temperature

Gaithersburg - Montgomery County Airport (10.6 miles)

  • Lowest 4 July, 2025

    60.1 °F

  • Average July

    78.3 °F

  • Highest 8 July, 2025

    95 °F

Climate (2020–Present)

Gaithersburg - Montgomery County Airport (10.6 miles)

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  • Average Low 2020–2025

    46.4 °F

  • Average 2020–2025

    56.1 °F

  • Average High 2020–2025

    65.9 °F
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