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

Storm Impacting the Southwest U.S.; Above Normal Temperatures Further East

A storm system will shift across the southwest U.S. through Thursday with widespread showers and isolated thunderstorms. Isolated flooding is possible. High-elevation snow is also expected in parts of Nevada and the southern Sierra Nevada range. East of this storm, above average temperatures will challenge or break daily record high temperatures this week in the southern Plains and southeast U.S. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Light Rain

44°F

7°C

Humidity 60%
Wind Speed S 6 mph
Barometer 30.16 in (1023.3 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 18 Nov 5:56 pm EST
Extended Forecast for

Dayton MD

  • Tonight

    Tonight: Rain. Patchy fog after 9pm. Low around 38. South wind 3 to 6 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 38 °F

    Rain and
    Patchy Fog

  • Wednesday

    Wednesday: A chance of rain before 7am. Patchy fog before 10am. Otherwise, cloudy, with a high near 49. Calm wind becoming north around 6 mph in the morning. Chance of precipitation is 30%.

    High: 49 °F

    Chance Rain
    and Patchy
    Fog then
    Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Mostly Cloudy

  • Thursday

    Thursday: Cloudy, with a high near 50. Light and variable wind.

    High: 50 °F

    Cloudy

  • Thursday Night

    Thursday Night: Cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Cloudy

  • Friday

    Friday: A slight chance of rain. Mostly cloudy, with a high near 57. Chance of precipitation is 20%.

    High: 57 °F

    Slight Chance
    Rain

  • Friday Night

    Friday Night: Rain likely, mainly after 1am. Cloudy, with a low around 44. Chance of precipitation is 60%.

    Low: 44 °F

    Rain Likely

  • Saturday

    Saturday: A chance of rain. Mostly cloudy, with a high near 52. Chance of precipitation is 40%.

    High: 52 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Rain. Patchy fog after 9pm. Low around 38. South wind 3 to 6 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday
A chance of rain before 7am. Patchy fog before 10am. Otherwise, cloudy, with a high near 49. Calm wind becoming north around 6 mph in the morning. Chance of precipitation is 30%.
Wednesday Night
Mostly cloudy, with a low around 37. Calm wind.
Thursday
Cloudy, with a high near 50. Light and variable wind.
Thursday Night
Cloudy, with a low around 43. Calm wind.
Friday
A slight chance of rain. Mostly cloudy, with a high near 57. Chance of precipitation is 20%.
Friday Night
Rain likely, mainly after 1am. Cloudy, with a low around 44. Chance of precipitation is 60%.
Saturday
A chance of rain. Mostly cloudy, with a high near 52. Chance of precipitation is 40%.
Saturday Night
Mostly cloudy, with a low around 36.
Sunday
Mostly sunny, with a high near 54.
Sunday Night
Partly cloudy, with a low around 37.
Monday
Sunny, with a high near 57.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Mostly sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
Dayton MD
 39.24°N 76.99°W (Elev. 568 ft)
Last Update:
3:53 pm EST Nov 18, 2025
Forecast Valid:
6pm EST Nov 18, 2025-6pm EST Nov 25, 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