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

Heavy Rainfall and Flooding in the Southwest and Along the East Coast

A multi-day heavy rainfall event is set to begin across New Mexico into west Texas Tuesday through Wednesday. Flash flooding and debris flows in the vicinity of burn scars will also be possible. A strong coastal low will develop offshore of the Mid-Atlantic coast midweek, bringing heavy rainfall, strong winds and coastal flooding to much of the East Coast through Friday. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Light Rain

63°F

17°C

Humidity NA
Wind Speed Vrbl 3 mph
Barometer 30.12 in (1020.9 mb)
Dewpoint N/A
Visibility 2.00 mi
Last update 22 Sep 1:56 am EDT
Extended Forecast for

Ashton MD

  • Overnight

    Overnight: Showers. Low around 60. East wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 60 °F

    Showers

  • Tuesday

    Tuesday: Showers. Patchy fog after 8am. High near 60. Northeast wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 60 °F

    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Showers, mainly before midnight. Patchy fog before 9pm. Low around 54. Northeast wind 11 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 54 °F

    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: A chance of showers, mainly before 1pm. Cloudy, with a high near 62. Northeast wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.

    High: 62 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 52. Northeast wind around 10 mph, with gusts as high as 23 mph.

    Low: 52 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

Detailed Forecast

Overnight
Showers. Low around 60. East wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
Showers. Patchy fog after 8am. High near 60. Northeast wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Showers, mainly before midnight. Patchy fog before 9pm. Low around 54. Northeast wind 11 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
A chance of showers, mainly before 1pm. Cloudy, with a high near 62. Northeast wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.
Wednesday Night
Mostly cloudy, with a low around 52. Northeast wind around 10 mph, with gusts as high as 23 mph.
Thursday
Partly sunny, with a high near 62.
Thursday Night
Partly cloudy, with a low around 50.
Friday
Mostly sunny, with a high near 65.
Friday Night
Partly cloudy, with a low around 51.
Saturday
Mostly sunny, with a high near 66.
Saturday Night
Partly cloudy, with a low around 53.
Sunday
Mostly sunny, with a high near 68.
Sunday Night
Partly cloudy, with a low around 53.
Monday
Sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ashton MD
 39.15°N 77.01°W (Elev. 449 ft)
Last Update:
2:22 am EDT Sep 22, 2026
Forecast Valid:
2am EDT Sep 22, 2026-6pm EDT Sep 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