Weather WorldUnion County, NJ 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Union County, NJ Weather Forecast
Union County, NJ Weather Forecast Date: 703 AM EDT Sat Sep 19 2026
or toggle through each period.
Today... Partly sunny. Highs in the lower 70s. Northeast winds 5 to 10 mph, becoming east this afternoon.
Tonight... Mostly cloudy. Lows around 60. Southeast winds 5 to 10 mph.
Sunday... A chance of rain in the morning, then rain in the afternoon. Highs in the lower 70s. Southeast winds 5 to 10 mph. Chance of rain 90%.
Sunday Night... Rain likely with a slight chance of thunderstorms in the evening, then rain likely after midnight. Lows in the upper 50s. South winds around 5 mph, becoming north after midnight. Chance of rain 70%.
Monday... Partly sunny. A chance of rain in the morning. Highs in the upper 60s. Northeast winds 5 to 10 mph with gusts up to 25 mph. Chance of rain 40%.
Monday Night... Mostly cloudy. A chance of showers after midnight. Lows in the lower 50s. Chance of rain 30%.
Tuesday... Mostly cloudy with a 30% chance of showers. Highs in the lower 60s.
Tuesday Night... Mostly cloudy. A chance of showers in the evening. Lows in the lower 50s. Chance of rain 30%.
Wednesday... Mostly cloudy. Highs in the lower 60s.
Wednesday Night... Mostly cloudy with a 30% chance of showers. Lows in the lower 50s.
Thursday... Mostly cloudy with a 30% chance of showers. Highs in the lower 60s.
Thursday Night... Mostly cloudy with a 40% chance of showers. Lows around 50.
POP = Probability of Precipitation
Union County Radar Loop
Use the map search tool if you want to place a location marker on the radar map...