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Mercer County, NJ
 Details for Mercer County, NJ Heat Advisory  +1 additional alert
Heat Advisory HEAT ADVISORY - Mercer County, NJ
Air Quality Alert AIR QUALITY ALERT - 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: @ 08-Aug-2026 2:35pm - next update at 2:40pm  
Summary / Temperature Wind Rain Outlook
Partly cloudy, Dry Partly cloudy, Dry
Currently: 90.5, Max: 92.8, Min: 69.8 90.5°F
Colder 0.3°F than last hour.

Hot

Feels like: 99.7°F

24-hr difference
-2.9°FColder 2.9°F than yesterday at this time.
  Today Yesterday
High: 92.8°F
2:25pm 		75.7°F
4:46pm
Low: 69.8°F
5:42am 		70.7°F
11:49pm
Wind from SSE SSE
3.8
Gust:
 8.1 mph
2 Bft - Light Breeze
Today: 12.7 mph 2:28pm
Gust Month: 14.7 mph August 2
Rain Today: 0 in
Rain Rate (/hr): 0 in
Rain Yesterday: 0.92 in
Storm Rain: 0 in
This Month: 3.74 in
Season Total: 11.37 in
5 rain days in August.
Tonight

Tonight: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Humidity & Barometer Almanac Moon
Humidity: 56 % Decreased 2.0% since last hour.
Dew Point: 72.7°F Decreased 1.3°F since last hour.
Barometer: 29.991 inHg Falling 0.01 inHg/hr
Baro Trend: Steady
Sunrise: 6:04am
Sunset: 8:07pm
Moonrise: 12:59am
Moonset: 4:57pm
Waning Crescent
Waning Crescent, Moon at 25 days in cycle
21%
Illuminated
UV Index Solar Radiation
   0.0    None
High: -1.0 @ 12:35pm
223 W/m2 (23 %)
High: 945 @  2:04pm
 NWS Weather Forecast  - Outlook: This Afternoon & Tonight
This
Afternoon
This Afternoon: Chance Showers And Thunderstorms
Chance Showers And T-Storms

Hi 93 °F		 NWS forecast: A chance of showers and thunderstorms. Partly sunny, with a high near 93. Heat index values as high as 101. West wind around 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
 
Tonight

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

Lo 73 °F		 NWS forecast: A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 73. Southwest wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.