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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Baltimore, Inner Harbor (KDMH)

Lat: 39.28°NLon: 76.62°WElev: 20ft.

77°F

25°C

Humidity 71%
Wind Speed NA
Barometer 29.98 in (1015.0 mb)
Dewpoint 67°F (19°C)
Visibility NA
Heat Index79°F (26°C)
Last update 20 Sep 11:53 am EDT
Extended Forecast for

Marriottsville MD

  • This Afternoon

    This Afternoon: Showers likely, then showers and possibly a thunderstorm after 2pm. High near 80. Southwest wind 10 to 13 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Showers

  • Tonight

    Tonight: Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 2am. Mostly cloudy, with a low around 61. West wind 5 to 7 mph becoming north after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Showers
    Likely then
    Chance
    Showers

  • Monday

    Monday: A slight chance of showers before 9am, then a slight chance of showers after 5pm. Increasing clouds, with a high near 71. North wind 8 to 11 mph. Chance of precipitation is 20%.

    High: 71 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Monday Night

    Monday Night: Showers, mainly after 8pm. Low around 55. East wind around 8 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 55 °F

    Showers

  • Tuesday

    Tuesday: Showers, with thunderstorms also possible after 2pm. High near 62. Northeast wind 11 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 62 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 51. Chance of precipitation is 60%.

    Low: 51 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers. Mostly cloudy, with a high near 61. Chance of precipitation is 50%.

    High: 61 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 50%.

    Low: 51 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.

    High: 62 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Showers likely, then showers and possibly a thunderstorm after 2pm. High near 80. Southwest wind 10 to 13 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 2am. Mostly cloudy, with a low around 61. West wind 5 to 7 mph becoming north after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
A slight chance of showers before 9am, then a slight chance of showers after 5pm. Increasing clouds, with a high near 71. North wind 8 to 11 mph. Chance of precipitation is 20%.
Monday Night
Showers, mainly after 8pm. Low around 55. East wind around 8 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
Showers, with thunderstorms also possible after 2pm. High near 62. Northeast wind 11 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Tuesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 51. Chance of precipitation is 60%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 61. Chance of precipitation is 50%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 50%.
Thursday
A chance of showers. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 49. Chance of precipitation is 20%.
Friday
A slight chance of showers. Mostly sunny, with a high near 64. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 50.
Saturday
Mostly sunny, with a high near 66.
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ABOUT THIS FORECAST

 
Point Forecast:
Marriottsville MD
 39.36°N 76.89°W (Elev. 413 ft)
Last Update:
10:53 am EDT Sep 20, 2026
Forecast Valid:
12pm EDT Sep 20, 2026-6pm EDT Sep 26, 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