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

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Overcast

37°F

3°C

Humidity 89%
Wind Speed W 6 mph
Barometer 29.98 in (1014.7 mb)
Dewpoint 34°F (1°C)
Visibility 7.00 mi
Wind Chill32°F (0°C)
Last update 23 Dec 10:53 pm EST
Extended Forecast for

Rocky Hill NJ

  • Tonight

    Tonight: Partly cloudy, with a low around 33. West wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 33 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 44. Northwest wind 5 to 15 mph, with gusts as high as 30 mph.

    High: 44 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 25. Calm wind.

    Low: 25 °F

    Increasing
    Clouds

  • Christmas Day

    Christmas Day: A slight chance of rain and snow before 10am, then a slight chance of rain between 10am and 1pm. Mostly cloudy, with a high near 43. Light and variable wind becoming west 5 to 10 mph in the morning. Chance of precipitation is 20%.

    High: 43 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 22. Northwest wind around 5 mph.

    Low: 22 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of snow after 1pm. Mostly cloudy, with a high near 32. Chance of precipitation is 50%.

    High: 32 °F

    Mostly Cloudy
    then Chance
    Snow

  • Friday Night

    Friday Night: Snow before 1am, then snow and freezing rain. Low around 26. Chance of precipitation is 100%.

    Low: 26 °F

    Snow then
    Wintry Mix

  • Saturday

    Saturday: A chance of snow before 1pm, then a chance of rain and snow. Cloudy, with a high near 35. Chance of precipitation is 50%.

    High: 35 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: A chance of snow. Cloudy, with a low around 30. Chance of precipitation is 40%.

    Low: 30 °F

    Chance Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 33. West wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 44. Northwest wind 5 to 15 mph, with gusts as high as 30 mph.
Wednesday Night
Increasing clouds, with a low around 25. Calm wind.
Christmas Day
A slight chance of rain and snow before 10am, then a slight chance of rain between 10am and 1pm. Mostly cloudy, with a high near 43. Light and variable wind becoming west 5 to 10 mph in the morning. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 22. Northwest wind around 5 mph.
Friday
A chance of snow after 1pm. Mostly cloudy, with a high near 32. Chance of precipitation is 50%.
Friday Night
Snow before 1am, then snow and freezing rain. Low around 26. Chance of precipitation is 100%.
Saturday
A chance of snow before 1pm, then a chance of rain and snow. Cloudy, with a high near 35. Chance of precipitation is 50%.
Saturday Night
A chance of snow. Cloudy, with a low around 30. Chance of precipitation is 40%.
Sunday
Rain. High near 43. Chance of precipitation is 80%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 26. Chance of precipitation is 50%.
Monday
Partly sunny, with a high near 34.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Mostly sunny, with a high near 30.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rocky Hill NJ
 40.39°N 74.66°W (Elev. 190 ft)
Last Update:
4:12 pm EST Dec 23, 2025
Forecast Valid:
11pm EST Dec 23, 2025-6pm EST Dec 30, 2025
 
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