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.

Mostly Cloudy

67°F

19°C

Humidity 77%
Wind Speed NE 9 mph
Barometer 30.16 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 19 Sep 9:35 am EDT
Extended Forecast for

Jarrettsville MD

  • Today

    Today: Partly sunny, with a high near 76. East wind 5 to 7 mph.

    High: 76 °F

    Partly Sunny

  • Tonight

    Tonight: A chance of showers, mainly between 1am and 4am. Cloudy, with a low around 62. Southeast wind around 9 mph. Chance of precipitation is 30%.

    Low: 62 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers likely, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 79. South wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely before 11pm, then showers likely between 11pm and 2am. Mostly cloudy, with a low around 58. Light and variable wind becoming north 6 to 11 mph after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 69. Northeast wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    High: 69 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers. Cloudy, with a low around 53. Chance of precipitation is 40%.

    Low: 53 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers. Mostly cloudy, with a high near 62. Chance of precipitation is 50%.

    High: 62 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 40%.

    Low: 50 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers. Mostly cloudy, with a high near 61. Chance of precipitation is 40%.

    High: 61 °F

    Chance
    Showers

Detailed Forecast

Today
Partly sunny, with a high near 76. East wind 5 to 7 mph.
Tonight
A chance of showers, mainly between 1am and 4am. Cloudy, with a low around 62. Southeast wind around 9 mph. Chance of precipitation is 30%.
Sunday
Showers likely, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 79. South wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers and thunderstorms likely before 11pm, then showers likely between 11pm and 2am. Mostly cloudy, with a low around 58. Light and variable wind becoming north 6 to 11 mph after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 69. Northeast wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Monday Night
A chance of showers. Cloudy, with a low around 53. Chance of precipitation is 40%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 62. Chance of precipitation is 50%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 40%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 61. Chance of precipitation is 40%.
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 62. Chance of precipitation is 40%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 30%.
Friday
A chance of showers. Partly sunny, with a high near 66. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Jarrettsville MD
 39.61°N 76.47°W (Elev. 574 ft)
Last Update:
7:52 am EDT Sep 19, 2026
Forecast Valid:
9am EDT Sep 19, 2026-6pm EDT Sep 25, 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