National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Tracking Storm System Across the Central U.S.

A storm system will slowly continue to press across the central U.S. Friday and Saturday with widespread showers and thunderstorms. Slight risks for severe thunderstorms and excessive rainfall have been issued Saturday from the Ozarks into the mid-Mississippi River Valley with potential for damaging winds, large hail, tornadoes, and flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

41°F

5°C

Humidity 70%
Wind Speed Calm
Barometer 30.08 in (1020.0 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 17 Oct 2:56 am EDT
Extended Forecast for

Potomac MD

  • Overnight

    Overnight: Clear, with a low around 39. North wind around 6 mph.

    Low: 39 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 64. Northwest wind 6 to 8 mph.

    High: 64 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 69. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 69 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 53. Southeast wind around 6 mph.

    Low: 53 °F

    Mostly Clear

  • Sunday

    Sunday: A chance of showers after 2pm. Partly sunny, with a high near 75. Chance of precipitation is 50%.

    High: 75 °F

    Mostly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 50. Chance of precipitation is 70%.

    Low: 50 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers before 8am. Mostly sunny, with a high near 64. Chance of precipitation is 30%.

    High: 64 °F

    Chance
    Showers then
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 39. North wind around 6 mph.
Friday
Sunny, with a high near 64. Northwest wind 6 to 8 mph.
Friday Night
Mostly clear, with a low around 44. Calm wind.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 69. Calm wind becoming south 5 to 7 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 53. Southeast wind around 6 mph.
Sunday
A chance of showers after 2pm. Partly sunny, with a high near 75. Chance of precipitation is 50%.
Sunday Night
Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 50. Chance of precipitation is 70%.
Monday
A chance of showers before 8am. Mostly sunny, with a high near 64. Chance of precipitation is 30%.
Monday Night
Mostly clear, with a low around 44.
Tuesday
Sunny, with a high near 69.
Tuesday Night
Partly cloudy, with a low around 47.
Wednesday
Sunny, with a high near 61.
Wednesday Night
Mostly clear, with a low around 42.
Thursday
Mostly sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Potomac MD
 39.04°N 77.2°W (Elev. 397 ft)
Last Update:
1:29 am EDT Oct 17, 2025
Forecast Valid:
3am EDT Oct 17, 2025-6pm EDT Oct 23, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation