Potomac Weather Forecast

    • 50
    • 68

    Mostly Sunny

    • 49
    • 68

    Partly Sunny

    • 54
    • 68

    Mostly Cloudy

    • 55
    • 63

    Chance Rain Showers

    • 54
    • 63

    Chance Rain Showers

    • 52
    • 61

    Chance Rain Showers

Today 28 Sep Central and Southeast Montgomery

Sunny. Highs in the upper 60s. Northwest Winds 5 to 10 Mph.

Tonight 28 Sep Central and Southeast Montgomery

Mostly cloudy in the Evening, then clearing. Lows around 50. North Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac Temperature Statistics

September Temperature

Gaithersburg - Montgomery County Airport (10.6 miles)

  • Lowest 24 September, 2022

    43 °F
  • Average September

    69 °F
  • Highest 4 September, 2022

    88 °F

Climate (2010–Present)

Gaithersburg - Montgomery County Airport (10.6 miles)

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  • Average Low 2010–Present

    47.5 °F
  • Average 2010–Present

    56.9 °F
  • Average High 2010–Present

    66.8 °F
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