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

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Overcast

54°F

12°C

Humidity 87%
Wind Speed SE 9 mph
Barometer 29.94 in (1015.2 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 22 Mar 12:56 am EDT
Extended Forecast for

Dayton MD

  • Overnight

    Overnight: Mostly cloudy, with a low around 46. South wind around 6 mph.

    Low: 46 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 80. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 80 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 47. Southwest wind around 8 mph becoming north after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 47 °F

    Chance
    T-storms then
    Showers

  • Monday

    Monday: Showers before 8am, then a slight chance of rain between 8am and 2pm. High near 55. Northwest wind 14 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 55 °F

    Showers then
    Slight Chance
    Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 31. North wind 7 to 10 mph.

    Low: 31 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 58.

    High: 58 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 46. South wind around 6 mph.
Sunday
Partly sunny, with a high near 80. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Sunday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 47. Southwest wind around 8 mph becoming north after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers before 8am, then a slight chance of rain between 8am and 2pm. High near 55. Northwest wind 14 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Mostly clear, with a low around 31. North wind 7 to 10 mph.
Tuesday
Sunny, with a high near 49.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
Partly sunny, with a high near 58.
Wednesday Night
Mostly cloudy, with a low around 41.
Thursday
Partly sunny, with a high near 63.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 45. Chance of precipitation is 50%.
Friday
A chance of rain. Partly sunny, with a high near 56. Chance of precipitation is 30%.
Friday Night
A chance of rain. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Dayton MD
 39.24°N 76.99°W (Elev. 568 ft)
Last Update:
10:53 pm EDT Mar 21, 2026
Forecast Valid:
1am EDT Mar 22, 2026-6pm EDT Mar 28, 2026
 
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