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

64°F

18°C

Humidity 90%
Wind Speed S 5 mph
Barometer 29.86 in (1010.6 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 14 Oct 1:53 am EDT
Extended Forecast for

Rocky Hill NJ

  • Overnight

    Overnight: Clear, with a low around 64. Southwest wind around 5 mph.

    Low: 64 °F

    Clear

  • Wednesday

    Wednesday: A slight chance of showers between 1pm and 2pm. Increasing clouds, with a high near 83. West wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 83 °F

    Sunny then
    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 54. North wind around 5 mph.

    Low: 54 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 68. North wind around 5 mph becoming calm.

    High: 68 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers, mainly after 2am. Low around 53. Southeast wind around 5 mph becoming calm. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 53 °F

    Slight Chance
    Showers then
    Showers

  • Friday

    Friday: Showers, with thunderstorms also possible after 2pm. High near 76. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Showers

  • Friday Night

    Friday Night: Showers before 8pm. Low around 43. Chance of precipitation is 80%.

    Low: 43 °F

    Showers then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Patchy frost after 4am. Otherwise, mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear
    then Patchy
    Frost

Detailed Forecast

Overnight
Clear, with a low around 64. Southwest wind around 5 mph.
Wednesday
A slight chance of showers between 1pm and 2pm. Increasing clouds, with a high near 83. West wind 5 to 10 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 54. North wind around 5 mph.
Thursday
Mostly sunny, with a high near 68. North wind around 5 mph becoming calm.
Thursday Night
Showers, mainly after 2am. Low around 53. Southeast wind around 5 mph becoming calm. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers, with thunderstorms also possible after 2pm. High near 76. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers before 8pm. Low around 43. Chance of precipitation is 80%.
Saturday
Mostly sunny, with a high near 53.
Saturday Night
Patchy frost after 4am. Otherwise, mostly clear, with a low around 35.
Sunday
Patchy frost before 9am. Otherwise, sunny, with a high near 59.
Sunday Night
Mostly clear, with a low around 39.
Monday
Mostly sunny, with a high near 65.
Monday Night
Mostly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 68.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rocky Hill NJ
 40.41°N 74.63°W (Elev. 98 ft)
Last Update:
4:09 pm EDT Oct 13, 2026
Forecast Valid:
1am EDT Oct 14, 2026-6pm EDT Oct 20, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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