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

Harford County Airport (K0W3)

Lat: 39.57°NLon: 76.2°WElev: 412ft.

Overcast

68°F

20°C

Humidity 100%
Wind Speed S 9 mph
Barometer 29.99 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 20 Sep 6:35 am EDT
Extended Forecast for

Fallston MD

  • Today

    Today: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm. High near 79. Southwest wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Showers

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers between 1am and 2am. Mostly cloudy, with a low around 61. Light and variable wind becoming north 5 to 8 mph 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
    Slight Chance
    Showers

  • Monday

    Monday: A chance of showers, mainly between 2pm and 5pm. Increasing clouds, with a high near 71. Northeast wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.

    High: 71 °F

    Partly Sunny
    then Chance
    Showers

  • Monday Night

    Monday Night: Showers likely, mainly after 8pm. Cloudy, with a low around 55. East wind 7 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 55 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely. Cloudy, with a high near 63. Northeast wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    High: 63 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers. Cloudy, with a low around 52. Chance of precipitation is 50%.

    Low: 52 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers. Mostly cloudy, with a high near 63. Chance of precipitation is 50%.

    High: 63 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 40%.

    Low: 51 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers. Mostly cloudy, with a high near 63. Chance of precipitation is 30%.

    High: 63 °F

    Chance
    Showers

Detailed Forecast

Today
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm. High near 79. Southwest wind 9 to 11 mph, with gusts as high as 21 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 likely and possibly a thunderstorm before 1am, then a slight chance of showers between 1am and 2am. Mostly cloudy, with a low around 61. Light and variable wind becoming north 5 to 8 mph 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 chance of showers, mainly between 2pm and 5pm. Increasing clouds, with a high near 71. Northeast wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.
Monday Night
Showers likely, mainly after 8pm. Cloudy, with a low around 55. East wind 7 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Showers likely. Cloudy, with a high near 63. Northeast wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Tuesday Night
A chance of showers. Cloudy, with a low around 52. Chance of precipitation is 50%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 63. Chance of precipitation is 50%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 40%.
Thursday
A chance of showers. Mostly cloudy, with a high near 63. Chance of precipitation is 30%.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 20%.
Friday
A slight chance of showers. Partly sunny, with a high near 65. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 50.
Saturday
Mostly sunny, with a high near 68.
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ABOUT THIS FORECAST

 
Point Forecast:
Fallston MD
 39.51°N 76.4°W (Elev. 400 ft)
Last Update:
4:52 am EDT Sep 20, 2026
Forecast Valid:
6am 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