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

Harford County Airport (K0W3)

Lat: 39.57°NLon: 76.2°WElev: 412ft.

Fair

37°F

3°C

Humidity 49%
Wind Speed S 5 mph
Barometer 30.14 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 12 Jan 8:35 pm EST
Extended Forecast for

3 Miles WNW Jarrettsville MD

  • Tonight

    Tonight: Mostly clear, with a low around 29. Calm wind becoming west around 5 mph in the evening.

    Low: 29 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 45. West wind 5 to 10 mph becoming south in the afternoon.

    High: 45 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. Southwest wind 7 to 10 mph, with gusts as high as 21 mph.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain. Cloudy, with a high near 47. Southwest wind around 6 mph. Chance of precipitation is 40%.

    High: 47 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain likely before 4am, then rain and snow likely. Cloudy, with a low around 27. Light and variable wind becoming northwest 5 to 10 mph after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 27 °F

    Rain Likely
    then
    Rain/Snow
    Likely

  • Thursday

    Thursday: Snow likely, mainly before 7am. Partly sunny, with a high near 32. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 32 °F

    Snow Likely
    then Chance
    Snow

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 29. Calm wind becoming west around 5 mph in the evening.
Tuesday
Sunny, with a high near 45. West wind 5 to 10 mph becoming south in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 36. Southwest wind 7 to 10 mph, with gusts as high as 21 mph.
Wednesday
A chance of rain. Cloudy, with a high near 47. Southwest wind around 6 mph. Chance of precipitation is 40%.
Wednesday Night
Rain likely before 4am, then rain and snow likely. Cloudy, with a low around 27. Light and variable wind becoming northwest 5 to 10 mph after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday
Snow likely, mainly before 7am. Partly sunny, with a high near 32. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday Night
Partly cloudy, with a low around 16.
Friday
Mostly sunny, with a high near 30.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Mostly sunny, with a high near 38.
Saturday Night
Mostly cloudy, with a low around 22.
Sunday
Partly sunny, with a high near 30.
Sunday Night
Partly cloudy, with a low around 14.
M.L.King Day
Mostly sunny, with a high near 27.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Jarrettsville MD
 39.62°N 76.52°W (Elev. 699 ft)
Last Update:
8:32 pm EST Jan 12, 2026
Forecast Valid:
8pm EST Jan 12, 2026-6pm EST Jan 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation