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

Hazardous Weather Conditions

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fog/Mist

31°F

-1°C

Humidity 96%
Wind Speed N 3 mph
Barometer 30.02 in (1016.0 mb)
Dewpoint 30°F (-1°C)
Visibility 1.00 mi
Last update 18 Jan 10:53 am EST
Extended Forecast for

Tullytown PA

Winter Weather Advisory until January 18, 08:00pm
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until January 18, 08:00pm

    NOW until 8:00pm Sun

    Winter Weather Advisory

  • Today

    High: 34 °F

    Rain/Snow
    Likely

  • Tonight

    Tonight: Snow likely, mainly before 7pm. Cloudy during the early evening, then gradual clearing, with a low around 19. West wind 5 to 10 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 19 °F

    Snow Likely
    then Mostly
    Clear

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 35. Southwest wind 5 to 15 mph.

    High: 35 °F

    Sunny

  • Monday Night

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

    Low: 13 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 23. West wind 10 to 15 mph.

    High: 23 °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 35.

    High: 35 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

Detailed Forecast

Today
Snow likely, possibly mixed with rain. Cloudy, with a high near 34. North wind around 5 mph. Chance of precipitation is 70%. Total daytime snow accumulation of 1 to 3 inches possible.
Tonight
Snow likely, mainly before 7pm. Cloudy during the early evening, then gradual clearing, with a low around 19. West wind 5 to 10 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
M.L.King Day
Sunny, with a high near 35. Southwest wind 5 to 15 mph.
Monday Night
Mostly clear, with a low around 13. West wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 23. West wind 10 to 15 mph.
Tuesday Night
Mostly clear, with a low around 8.
Wednesday
Mostly sunny, with a high near 35.
Wednesday Night
Mostly cloudy, with a low around 27.
Thursday
Mostly sunny, with a high near 38.
Thursday Night
Mostly clear, with a low around 18.
Friday
Mostly sunny, with a high near 33.
Friday Night
Mostly cloudy, with a low around 25.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 37. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tullytown PA
 40.14°N 74.83°W (Elev. 39 ft)
Last Update:
4:11 am EST Jan 18, 2026
Forecast Valid:
11am EST Jan 18, 2026-6pm EST Jan 24, 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