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Mercer County, NJ
 Details for Mercer County, NJ Flash Flood Warning  +2 additional alerts
Flash Flood Warning FLASH FLOOD WARNING - Mercer County, NJ
Heat Advisory HEAT ADVISORY - Mercer County, NJ

NWS Northeast Regional Radar WU North East Satellite
Radar/Satellite images courtesy of NOAA/NWS and Weather Underground.
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Updated: @ 05-Aug-2026 3:45pm - next update at 3:50pm  
Summary / Temperature Wind Rain Outlook
Cloudy, Stopped raining Cloudy, Stopped raining
Currently: 76.5, Max: 84.2, Min: 64.8 76.5°F
Warmer 0.2°F than last hour.

Comfortable

Feels like: 76.7°F

24-hr difference
-9.8°FColder 9.8°F than yesterday at this time.
  Today Yesterday
High: 84.2°F
1:38pm 		87.3°F
3:50pm
Low: 64.8°F
3:16am 		61.2°F
6:13am
Wind from E E
0.2
Gust:
 2.2 mph
0 Bft - Calm
Today: 5.8 mph 12:14pm
Gust Month: 14.8 mph August 2
Rain Today: 0.59 in
Rain Rate (/hr): 0 in
Rain Yesterday: 0 in
Storm Rain: 0 in
This Month: 2.8 in
Season Total: 10.43 in
3 rain days in August.
Tonight

Tonight: Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Chance Showers And T-Storms then Slight Chance Showers And T-Storms
Humidity & Barometer Almanac Moon
Humidity: 95 %  
Dew Point: 75°F Increased 0.2°F since last hour.
Barometer: 30.112 inHg Falling 0.02 inHg/hr
Baro Trend: Steady
Sunrise: 6:01am
Sunset: 8:11pm
Moonset: 1:23pm
Moonrise: 11:00pm
Waning Gibbous
Waning Gibbous, Moon at 21 days in cycle
53%
Illuminated
UV Index Solar Radiation
   1.0     Low 
High: 1.0 @ 12:35pm
74 W/m2 (8 %)
High: 997 @  1:33pm
 NWS Weather Forecast  - Outlook: This Afternoon & Tonight
This
Afternoon
This Afternoon: Chance Showers And Thunderstorms
Chance Showers And T-Storms

Hi 84 °F		 NWS forecast: A chance of showers and thunderstorms before 3pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 84. Southeast wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
 
Tonight

Tonight: Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Chance Showers And T-Storms then Slight Chance Showers And T-Storms

Lo 72 °F		 NWS forecast: A chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms between 8pm and 5am. Mostly cloudy, with a low around 72. South wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.