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.

Fair

27°F

-3°C

Humidity 66%
Wind Speed Calm
Barometer 29.99 in (1015.4 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Last update 19 Jan 5:53 pm EST
Extended Forecast for

Tullytown PA

Cold Weather Advisory January 20, 02:00am until January 20, 10:00am
Click here for hazard details and duration
Cold Weather Advisory

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 15. West wind 10 to 15 mph.

    Low: 15 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 22. West wind 10 to 15 mph.

    High: 22 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 8. West wind around 5 mph becoming calm in the evening.

    Low: 8 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 35. Light south wind increasing to 5 to 10 mph in the morning.

    High: 35 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 29. Southwest wind 5 to 10 mph.

    Low: 29 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 23 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 33.

    High: 33 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 13.

    Low: 13 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 15. West wind 10 to 15 mph.
Tuesday
Sunny, with a high near 22. West wind 10 to 15 mph.
Tuesday Night
Mostly clear, with a low around 8. West wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 35. Light south wind increasing to 5 to 10 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 29. Southwest wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 43.
Thursday Night
Partly cloudy, with a low around 23.
Friday
Partly sunny, with a high near 33.
Friday Night
Mostly cloudy, with a low around 13.
Saturday
A chance of snow after 1pm. Mostly cloudy, with a high near 19. Chance of precipitation is 30%.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 10. Chance of precipitation is 40%.
Sunday
A chance of snow. Partly sunny, with a high near 19. Chance of precipitation is 40%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 7. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 21.
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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:
4:10 pm EST Jan 19, 2026
Forecast Valid:
6pm EST Jan 19, 2026-6pm EST Jan 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