Potomac Weather Forecast

    • 51
    • 80

    Rain Showers Likely

    • 46
    • 66

    Chance Rain Showers

    • 51
    • 68

    Mostly Sunny

    • 52
    • 71

    Rain Showers

    • 51
    • 68

    Mostly Sunny

    • 55
    • 73

    Partly Sunny

Today 10 May Central and Southeast Montgomery

Mostly sunny. A chance of Showers and Thunderstorms in the afternoon. Highs around 80. West Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 10 May Central and Southeast Montgomery

A chance of Thunderstorms in the evening. Mostly cloudy with a chance of Showers. Lows in the lower 50s. North Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac Temperature Statistics

May Temperature

Gaithersburg - Montgomery County Airport (10.6 miles)

  • Lowest 1 May, 2026

    37.4 °F

  • Average May

    58.5 °F

  • Highest 5 May, 2026

    84 °F

Climate (2021–Present)

Gaithersburg - Montgomery County Airport (10.6 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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