Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28° N Lon: 74.82° W Elev: 210 ft.

Partly Cloudy

76°F

24°C

Humidity 60%
Wind Speed S 10 mph
Barometer 29.71 in (1005.5 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 11 Mar 4:53 pm EDT
Detailed forecast for

Mercer County

Tonight
Mostly cloudy. Showers likely with a chance of thunderstorms this evening, then a chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 40s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 60 percent.
Thursday
Rain likely. A chance of snow in the afternoon. Much cooler with highs in the mid 50s. Temperature falling to around 40 in the afternoon. Northwest winds 10 to 15 mph with gusts up to 30 mph. Chance of precipitation 70 percent.
Thursday Night
Partly cloudy in the evening, then clearing. Much colder with lows in the upper 20s. West winds 5 to 10 mph.
Friday
Partly sunny. Highs in the upper 40s. Southwest winds 5 to 10 mph, increasing to south 15 to 20 mph with gusts up to 30 mph in the afternoon.
Friday Night
Partly cloudy in the evening, then clearing. Lows in the upper 30s. South winds around 15 mph with gusts up to 30 mph, becoming southwest after midnight.
Saturday
Sunny. Highs in the lower 50s.
Saturday Night
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 30s.
Sunday
Cloudy. Highs in the lower 50s.
Sunday Night
Cloudy. A chance of rain in the evening, then rain after midnight. Not as cool with lows in the mid 40s. Temperature rising into the mid 50s after midnight. Chance of rain 90 percent.
Monday
Rain. Not as cool with highs in the mid 60s. Chance of rain 90 percent.
Monday Night
Mostly cloudy. Rain likely in the evening, then a chance of rain and snow after midnight. Much colder with lows around 30. Chance of precipitation 70 percent.
Tuesday
Mostly sunny. A chance of rain and snow in the morning. Much cooler with highs in the upper 30s. Chance of precipitation 30 percent.
Tuesday Night
Mostly cloudy in the evening, then clearing. Cold with lows in the lower 20s.
Wednesday
Mostly sunny. Highs in the upper 30s.



Basemap Options
Click map to change the forecast location
Loading map...
400 PM EDT Wed Mar 11 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database