New Jersey · NWS PHI office

Trenton, NJ weather

It is 43°F and clear at Trenton-Mercer Airport as of Oct 28, 8:00 AM EDT. Today: Mostly Sunny, high near 67°F, 2% chance of precipitation. Forecast from the National Weather Service, issued Oct 28, 4:08 AM EDT.

Updated Oct 28, 8:19 AM EDT (snapshot)

Current conditions

Temperature

43°F

Clear · feels like 40°F

Wind

N 5 mph

Humidity 81% · dew point 37°F

Pressure · visibility

30.46 inHg

Visibility 10 mi

Observed at Trenton-Mercer Airport (KTTN), Oct 28, 8:00 AM EDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Trenton forecast zone right now.

Around the NWS PHI forecast area

No active alerts in zones served by the PHI office near Trenton.

From the alert snapshot of Oct 28, 2026, 8:14 AM EDT. No alerts are active anywhere in New Jersey.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Trenton (local time)
TimeTempForecastPrecip. chanceWind
Wed 8 AM42°FMostly Sunny2% 0 mph
Wed 9 AM47°FMostly Sunny2% 0 mph
Wed 10 AM53°FMostly Sunny2% 0 mph
Wed 11 AM57°FMostly Sunny2% 0 mph
Wed 12 PM61°FMostly Sunny2% 0 mph
Wed 1 PM64°FMostly Sunny2% 0 mph
Wed 2 PM66°FPartly Sunny2% 0 mph
Wed 3 PM66°FPartly Sunny2% 0 mph
Wed 4 PM67°FMostly Cloudy1% 0 mph
Wed 5 PM65°FPartly Sunny1% 0 mph
Wed 6 PM62°FMostly Cloudy1% 0 mph
Wed 7 PM58°FMostly Cloudy1%SE 5 mph
Wed 8 PM53°FMostly Cloudy1% 0 mph
Wed 9 PM52°FMostly Cloudy1% 0 mph
Wed 10 PM50°FPartly Cloudy1% 0 mph
Wed 11 PM49°FMostly Clear1% 0 mph
Thu 12 AM48°FMostly Clear1% 0 mph
Thu 1 AM47°FClear1% 0 mph
Thu 2 AM46°FMostly Clear1% 0 mph
Thu 3 AM46°FMostly Clear1% 0 mph
Thu 4 AM45°FMostly Clear1% 0 mph
Thu 5 AM46°FPartly Cloudy1% 0 mph
Thu 6 AM46°FMostly Sunny1% 0 mph
Thu 7 AM45°FMostly Sunny1% 0 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Trenton can differ.

7-day forecast

Today

High 67°F·Low 44°F

Mostly sunny, with a high near 67. East wind around 0 mph.

Tonight: Partly cloudy, with a low around 44. Southeast wind 0 to 5 mph.

Thursday

High 71°F·Low 51°F

Mostly sunny, with a high near 71. Northwest wind 0 to 5 mph.

Thursday Night: Partly cloudy, with a low around 51. Southwest wind around 5 mph.

Friday

High 73°F·Low 41°F

Sunny, with a high near 73. West wind 5 to 10 mph.

Friday Night: Mostly clear, with a low around 41.

Saturday

High 65°F·Low 42°F

Mostly sunny, with a high near 65.

Saturday Night: Mostly cloudy, with a low around 42.

Sunday

High 68°F·Low 48°F

Partly sunny, with a high near 68.

Sunday Night: A slight chance of rain showers after 1am. Mostly cloudy, with a low around 48.

Monday

High 68°F·Low 50°F

A chance of rain showers. Mostly cloudy, with a high near 68. Chance of precipitation is 30%.

Monday Night: A chance of rain showers. Mostly cloudy, with a low around 50. Chance of precipitation is 30%.

Tuesday

High 68°F·Low 49°F

A chance of rain showers. Mostly cloudy, with a high near 68. Chance of precipitation is 30%.

Tuesday Night: A chance of rain showers. Mostly cloudy, with a low around 49.

Nearby cities

Larger cities in the area

Other cities in Mercer County

See every city we cover in New Jersey, or check all active alerts.

About this forecast

Forecast office
Trenton is served by the National Weather Service PHI forecast office, forecast zone NJZ015, county zone NJC021.
Location used
The Census Bureau's internal point for Trenton (40.2238, -74.7636), in Mercer County. Population: 91,193 (2024 estimate), number 5 of the 51 New Jersey cities on this site.
Radar
Nearest NWS radar: KDIX. View it on radar.weather.gov.

On Amazon

Weather-ready picks

As an Amazon Associate I earn from qualifying purchases.

Home & kitchen LEVOIT Air Purifier An air purifier for smoky or high-pollen days indoors. View on Amazon → Men’s fashion Hanes Fleece Hooded Sweatshirt A warm hoodie for chilly mornings. View on Amazon → Fitness & outdoors Stanley Quencher H2.0 Tumbler A big tumbler for long commutes and outdoor days. View on Amazon → Fitness & outdoors LifeStraw Personal Water Filter A personal water filter worth adding to an emergency kit. View on Amazon →

Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/40.2238,-74.7636 (forecast issued Oct 28, 4:08 AM EDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

More New Jersey cities