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

Isolated Severe Storms in the Midwest; Fire Weather Concerns in the Northern Plains; Record Heat in the West

Isolated severe storms are possible across parts of the Florida Peninsula and the Great Lakes to Lower Missouri Valley and south-central Plains late this afternoon and early evening. Elevated to critical fire weather concerns continue over much of the northern Great Plains. Above average temperatures persist across portions of the West today. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

62°F

17°C

Humidity 35%
Wind Speed Vrbl 6 mph
Barometer 30.24 in (1025.3 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 12 May 11:56 am EDT
Extended Forecast for

Potomac MD

  • This Afternoon

    This Afternoon: Sunny, with a high near 72. Calm wind becoming southwest around 5 mph.

    High: 72 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 55. South wind 6 to 11 mph, with gusts as high as 22 mph.

    Low: 55 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers likely, with thunderstorms also possible after 5pm. Increasing clouds, with a high near 75. South wind 13 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 75 °F

    Mostly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms. Low around 52. South wind 5 to 9 mph becoming west after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 52 °F

    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 65. Northwest wind 9 to 13 mph, with gusts as high as 23 mph.

    High: 65 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 72. Calm wind becoming southwest around 5 mph.
Tonight
Partly cloudy, with a low around 55. South wind 6 to 11 mph, with gusts as high as 22 mph.
Wednesday
Showers likely, with thunderstorms also possible after 5pm. Increasing clouds, with a high near 75. South wind 13 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and thunderstorms. Low around 52. South wind 5 to 9 mph becoming west after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Mostly sunny, with a high near 65. Northwest wind 9 to 13 mph, with gusts as high as 23 mph.
Thursday Night
Partly cloudy, with a low around 49.
Friday
Mostly sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Mostly sunny, with a high near 84.
Saturday Night
Partly cloudy, with a low around 62.
Sunday
Sunny, with a high near 88.
Sunday Night
Partly cloudy, with a low around 65.
Monday
Mostly sunny, with a high near 92.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Potomac MD
 39.02°N 77.18°W (Elev. 249 ft)
Last Update:
10:54 am EDT May 12, 2026
Forecast Valid:
12pm EDT May 12, 2026-6pm EDT May 18, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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