Heavy to Excessive Rainfall This Week from the Southwest into Central U.S.; Severe Weather in the Southern Plains

Pacific tropical moisture wrapping into a storm will continue a multi-day heavy rainfall event this week that will impact multiple areas in the Plains and Intermountain West. Isolated severe thunderstorm wind gusts and possibly a tornado or two could occur tonight from southern and eastern New Mexico into west Texas. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

60°F

16°C

Humidity 100%
Wind Speed Calm
Barometer 30.11 in (1020.7 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 30 Sep 12:56 am EDT
Extended Forecast for

Ashton-Sandy Spring MD

  • Overnight

    Overnight: Mostly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Patchy fog before 7am.  Otherwise, mostly sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 78 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 62. Light southeast wind.

    Low: 62 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 81. Light southwest wind.

    High: 81 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 63. Light southwest wind.

    Low: 63 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers.  Mostly cloudy, with a low around 61. Chance of precipitation is 30%.

    Low: 61 °F

    Chance
    Showers

  • Saturday

    Saturday: A chance of showers, mainly after 2pm.  Mostly cloudy, with a high near 70. Chance of precipitation is 30%.

    High: 70 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly after 2am.  Mostly cloudy, with a low around 57. Chance of precipitation is 60%.

    Low: 57 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Overnight
Mostly cloudy, with a low around 58. Calm wind.
Wednesday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 62. Light southeast wind.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 81. Light southwest wind.
Thursday Night
Partly cloudy, with a low around 63. Light southwest wind.
Friday
Mostly sunny, with a high near 84.
Friday Night
A chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.
Saturday
A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 70. Chance of precipitation is 30%.
Saturday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.
Sunday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 66.
Monday Night
Mostly clear, with a low around 45.
Tuesday
Sunny, with a high near 60.
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ABOUT THIS FORECAST

 
Point Forecast:
Ashton-Sandy Spring MD
 39.15°N 77.01°W (Elev. 449 ft)
10:53 pm EDT Sep 29, 2026
1am EDT Sep 30, 2026-6pm EDT Oct 6, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database