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.

Fair

62°F

17°C

Humidity 58%
Wind Speed E 6 mph
Barometer 30.16 in (1020.7 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 15 Oct 5:53 pm EDT
Extended Forecast for

Rocky Hill NJ

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm, mainly after 5am. Increasing clouds, with a low around 54. Southeast wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 54 °F

    Partly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after 5pm. High near 77. Southwest wind 5 to 15 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Showers then
    Chance
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 5am, then a chance of showers. Low around 45. West wind 5 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 45 °F

    Showers then
    Chance
    Showers

  • Saturday

    Saturday: Cloudy, then gradually becoming mostly sunny, with a high near 54. North wind around 15 mph, with gusts as high as 25 mph.

    High: 54 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 34. North wind 5 to 10 mph.

    Low: 34 °F

    Mostly Clear

  • Sunday

    Sunday: Patchy frost before 9am. Otherwise, sunny, with a high near 58.

    High: 58 °F

    Patchy Frost
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers likely and possibly a thunderstorm, mainly after 5am. Increasing clouds, with a low around 54. Southeast wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after 5pm. High near 77. Southwest wind 5 to 15 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm before 5am, then a chance of showers. Low around 45. West wind 5 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Cloudy, then gradually becoming mostly sunny, with a high near 54. North wind around 15 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 34. North wind 5 to 10 mph.
Sunday
Patchy frost before 9am. Otherwise, sunny, with a high near 58.
Sunday Night
Mostly clear, with a low around 37.
Monday
Sunny, with a high near 63.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Mostly sunny, with a high near 67.
Tuesday Night
Partly cloudy, with a low around 44.
Wednesday
Sunny, with a high near 67.
Wednesday Night
Mostly clear, with a low around 43.
Thursday
Sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
Rocky Hill NJ
 40.41°N 74.63°W (Elev. 98 ft)
Last Update:
4:09 pm EDT Oct 15, 2026
Forecast Valid:
5pm EDT Oct 15, 2026-6pm EDT Oct 22, 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