Potomac Weather Forecast

    • 31
    • 58

    Rain Showers

    • 37
    • 51

    Partly Sunny

    • 45
    • 60

    Mostly Cloudy

    • 50
    • 67

    Mostly Cloudy

    • 30
    • 61

    Chance Rain/Snow

    • 31
    • 48

    Mostly Sunny

Today 23 Mar Central and Southeast Montgomery

Mostly cloudy with Showers in the Morning, then mostly sunny in the afternoon. Much cooler with Highs in the upper 50s. North Winds 15 to 20 Mph. Gusts up to 35 Mph in the afternoon. Chance of rain 80 percent.

Tonight 23 Mar Central and Southeast Montgomery

Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 30s. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac Temperature Statistics

March Temperature

Gaithersburg - Montgomery County Airport (10.6 miles)

  • Lowest 18 March, 2026

    21 °F

  • Average March

    48.2 °F

  • Highest 10 March, 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

    65.9 °F
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