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Mercer County, NJ Weather Forecast
Mercer County, NJ Weather Forecast Date: 736 PM EDT Sun Sep 13 2026
The area/counties/county of: Mercer, including the city of Trenton.or toggle through each period.
Tonight... Mostly clear this evening, then partly cloudy with a slight chance of showers after midnight. Patchy fog. Lows in the mid 60s. West winds 5 to 10 mph. Chance of rain 20%.
Monday... Sunny. Less humid with highs in the mid 70s. North winds 10 to 15 mph.
Monday Night... Clear, cooler with lows in the lower 50s. North winds 5 to 10 mph.
Tuesday... Sunny. Highs in the mid 70s. Northeast winds around 5 mph, becoming southeast around 5 mph in the afternoon.
Tuesday Night... Mostly clear. Lows in the mid 50s. Southeast winds around 5 mph in the evening, becoming light and variable.
Wednesday... Sunny. Highs in the lower 80s.
Wednesday Night... Mostly clear. Lows around 60.
Thursday... Mostly sunny. Highs in the mid 80s.
Thursday Night... Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 60s.
Friday... Partly sunny. Highs in the lower 80s.
Friday Night... Partly cloudy. Lows around 60.
Saturday... Mostly sunny. Highs in the upper 70s.
Saturday Night... Partly cloudy in the evening, then becoming mostly cloudy. A 40% chance of showers. Lows around 60.
POP = Probability of Precipitation
Mercer County Radar Loop
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