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Hazardous Weather Conditions

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fog/Mist

29°F

-2°C

Humidity 96%
Wind Speed Calm
Barometer 30.10 in (1018.9 mb)
Dewpoint 28°F (-2°C)
Visibility 4.00 mi
Last update 17 Jan 9:53 pm EST
Extended Forecast for

2 Miles SW Hopewell NJ

Winter Weather Advisory January 18, 06:00am until January 18, 08:00pm
Dense Fog Advisory until January 18, 12:00am
Click here for hazard details and duration
Winter Weather Advisory
Dense Fog Advisory
  •  
    Dense Fog Advisory until January 18, 12:00am

    NOW until 12:00am Sun

    Dense Fog Advisory

  • Tonight

    Low: 29 °F

    Areas Dense
    Fog then
    Chance Snow
    and Areas
    Dense Fog

  • Sunday

    Sunday: Snow likely, mainly between 9am and 4pm. Cloudy, with a high near 33. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.

    High: 33 °F

    Snow Likely

  • Sunday Night

    Sunday Night: A chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 18. West wind 5 to 10 mph. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.

    Low: 18 °F

    Chance Snow

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 33. Southwest wind 5 to 10 mph, with gusts as high as 25 mph.

    High: 33 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 13. West wind around 10 mph, with gusts as high as 20 mph.

    Low: 13 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 22.

    High: 22 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 8.

    Low: 8 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

Detailed Forecast

Tonight
A chance of snow, mainly after 4am. Areas of dense fog before 1am. Otherwise, cloudy, with a low around 29. Calm wind. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.
Sunday
Snow likely, mainly between 9am and 4pm. Cloudy, with a high near 33. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.
Sunday Night
A chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 18. West wind 5 to 10 mph. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.
M.L.King Day
Mostly sunny, with a high near 33. Southwest wind 5 to 10 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 13. West wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 22.
Tuesday Night
Mostly clear, with a low around 8.
Wednesday
Mostly sunny, with a high near 33.
Wednesday Night
Mostly cloudy, with a low around 23.
Thursday
Partly sunny, with a high near 37.
Thursday Night
Partly cloudy, with a low around 16.
Friday
Mostly sunny, with a high near 31.
Friday Night
Mostly cloudy, with a low around 19.
Saturday
Mostly sunny, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Hopewell NJ
 40.36°N 74.79°W (Elev. 184 ft)
Last Update:
8:24 pm EST Jan 17, 2026
Forecast Valid:
10pm EST Jan 17, 2026-6pm EST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

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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