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

42°F

6°C

Humidity 89%
Wind Speed Calm
Barometer 30.20 in (1022.1 mb)
Dewpoint 39°F (4°C)
Visibility 9.00 mi
Last update 5 Mar 4:53 am EST
Extended Forecast for

Trenton, Mercer County Airport NJ

  • Overnight

    Overnight: Rain. Low around 39. Northeast wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 39 °F

    Rain

  • Thursday

    Thursday: Rain, mainly before 2pm. Patchy fog before 11am, then widespread fog after 2pm. High near 44. Northeast wind 5 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 44 °F

    Rain and
    Patchy Fog
    then Rain
    Likely and
    Fog

  • Thursday Night

    Thursday Night: Rain, mainly before 3am. Widespread fog, mainly after 3am. Low around 37. Northeast wind 10 to 15 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    Low: 37 °F

    Rain and Fog

  • Friday

    Friday: Areas of fog before 10am. Otherwise, cloudy, with a high near 45. East wind around 5 mph.

    High: 45 °F

    Areas Fog
    then Cloudy

  • Friday Night

    Friday Night: A chance of showers, mainly after 1am. Patchy fog after 1am. Otherwise, cloudy, with a low around 38. East wind around 5 mph becoming calm. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 10am. Otherwise, cloudy, with a high near 58.

    High: 58 °F

    Patchy Fog
    then Cloudy

  • Saturday Night

    Saturday Night: Showers likely. Mostly cloudy, with a low around 51. Chance of precipitation is 70%.

    Low: 51 °F

    Showers
    Likely

  • Sunday

    Sunday: Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Overnight
Rain. Low around 39. Northeast wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Rain, mainly before 2pm. Patchy fog before 11am, then widespread fog after 2pm. High near 44. Northeast wind 5 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Rain, mainly before 3am. Widespread fog, mainly after 3am. Low around 37. Northeast wind 10 to 15 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Friday
Areas of fog before 10am. Otherwise, cloudy, with a high near 45. East wind around 5 mph.
Friday Night
A chance of showers, mainly after 1am. Patchy fog after 1am. Otherwise, cloudy, with a low around 38. East wind around 5 mph becoming calm. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Patchy fog before 10am. Otherwise, cloudy, with a high near 58.
Saturday Night
Showers likely. Mostly cloudy, with a low around 51. Chance of precipitation is 70%.
Sunday
Partly sunny, with a high near 64.
Sunday Night
Partly cloudy, with a low around 43.
Monday
Sunny, with a high near 63.
Monday Night
Partly cloudy, with a low around 47.
Tuesday
Mostly sunny, with a high near 73.
Tuesday Night
Partly cloudy, with a low around 54.
Wednesday
A chance of showers. Partly sunny, with a high near 74. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Trenton, Mercer County Airport NJ
 40.28°N 74.83°W (Elev. 200 ft)
Last Update:
5:23 am EST Mar 5, 2026
Forecast Valid:
5am EST Mar 5, 2026-6pm EDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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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