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

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Thunderstorm in Vicinity Heavy Rain Fog/Mist

27°C

80°F

Humidity 100%
Wind Speed E 13 km/h
Barometer 1019.2 mb (30.08 in)
Dewpoint 27°C (80°F)
Visibility 4.02 km
Heat Index31°C (87°F)
Last update 13 Jul 1:56 pm EDT
Extended Forecast for

Rockville MD

Flood Watch until July 14, 02:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until July 14, 02:00am

    NOW until 2:00am Mon

    Flood Watch

  • This Afternoon

    High: 31 °C

    Showers

  • Tonight

    Tonight: Scattered showers and thunderstorms before 5am, then a slight chance of showers. Mostly cloudy, with a low around 23. South wind 3 to 8 km/h. Chance of precipitation is 50%.

    Low: 23 °C

    Scattered
    T-storms

  • Monday

    Monday: Showers and thunderstorms likely, mainly after 5pm. Mostly cloudy, with a high near 31. Southeast wind 3 to 8 km/h. Chance of precipitation is 60%. New rainfall amounts between 5 and 7.5 mm possible.

    High: 31 °C

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Monday Night

    Monday Night: Showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Some of the storms could produce heavy rainfall. Low around 22. Calm wind. Chance of precipitation is 80%. New rainfall amounts between 2 and 3 cm possible.

    Low: 22 °C

    Heavy Rain

  • Tuesday

    Tuesday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 31. Calm wind becoming south 5 to 8 km/h in the afternoon. Chance of precipitation is 70%.

    High: 31 °C

    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 23. Chance of precipitation is 60%.

    Low: 23 °C

    Showers
    Likely then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 32. Chance of precipitation is 60%.

    High: 32 °C

    Partly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 23. Chance of precipitation is 60%.

    Low: 23 °C

    Showers
    Likely then
    Mostly Cloudy

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 31. Southeast wind around 10 km/h. Chance of precipitation is 90%. New rainfall amounts of less than 1 mm, except higher amounts possible in thunderstorms.
Tonight
Scattered showers and thunderstorms before 5am, then a slight chance of showers. Mostly cloudy, with a low around 23. South wind 3 to 8 km/h. Chance of precipitation is 50%.
Monday
Showers and thunderstorms likely, mainly after 5pm. Mostly cloudy, with a high near 31. Southeast wind 3 to 8 km/h. Chance of precipitation is 60%. New rainfall amounts between 5 and 7.5 mm possible.
Monday Night
Showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Some of the storms could produce heavy rainfall. Low around 22. Calm wind. Chance of precipitation is 80%. New rainfall amounts between 2 and 3 cm possible.
Tuesday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 31. Calm wind becoming south 5 to 8 km/h in the afternoon. Chance of precipitation is 70%.
Tuesday Night
Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 23. Chance of precipitation is 60%.
Wednesday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 32. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 23. Chance of precipitation is 60%.
Thursday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 33. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 24. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 33. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 23. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 32. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Rockville MD
 39.08°N 77.16°W (Elev. 430 m)
Last Update:
1:30 pm EDT Jul 13, 2025
Forecast Valid:
2pm EDT Jul 13, 2025-6pm EDT Jul 19, 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