Mercer County, NJ Weather Forecast
County weather hub
Sunny
Compare major city weather across Mercer County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 81. Southwest wind 0 to 10 mph.
County Weather Overview
This county weather page brings together forecast coverage for Mercer County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 6 of 6 mapped cities in Mercer County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Aug 24 to Aug 30, 2026
- Latest sync
- Aug 24, 2026 1:40 AM EDT
- Forecast office
- PHI
- Source
- NOAA / NWS
Daily Outlook
This Week in Mercer County
Thursday looks like the warmest upcoming period in Mercer County at 86 degrees F.
Monday Night is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for Monday at about 0 to 10 mph SW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 24, 2026 1:40 AM EDT
- Coverage
- 7 days
- Time zone
- America/New_York
- Forecast office
- PHI
- Radar station
- KDIX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 60. West wind 0 to 5 mph.
Sunny, with a high near 82. West wind 0 to 5 mph.
Mostly clear, with a low around 62. Northwest wind 0 to 5 mph.
Sunny, with a high near 85.
A chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Showers and thunderstorms likely. Partly sunny, with a high near 86. Chance of precipitation is 60%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.
A chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Sunny, with a high near 85.
Mostly clear, with a low around 64.
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 84.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Aug 24
|
Sunny
|
81°F |
0 to 10 mph
SW
|
|
Monday Night
Aug 24
|
Mostly Clear
|
60°F |
0 to 5 mph
W
|
|
Tuesday
Aug 25
|
Sunny
|
82°F |
0 to 5 mph
W
|
|
Tuesday Night
Aug 25
|
Mostly Clear
|
62°F |
0 to 5 mph
NW
|
|
Wednesday
Aug 26
|
Sunny
|
85°F |
0 to 5 mph
W
|
|
Wednesday Night
Aug 26
|
Partly Cloudy then Chance Showers And Thunderstorms
|
67°F |
0 mph
|
|
Thursday
Aug 27
|
Showers And Thunderstorms Likely
|
86°F |
0 to 10 mph
S
|
|
Thursday Night
Aug 27
|
Showers And Thunderstorms Likely
|
68°F |
0 to 5 mph
S
|
|
Friday
Aug 28
|
Chance Showers And Thunderstorms
|
86°F |
0 to 5 mph
SW
|
|
Friday Night
Aug 28
|
Chance Showers And Thunderstorms then Partly Cloudy
|
67°F |
0 mph
|
|
Saturday
Aug 29
|
Sunny
|
85°F |
0 to 5 mph
NW
|
|
Saturday Night
Aug 29
|
Mostly Clear
|
64°F |
0 to 5 mph
E
|
|
Sunday
Aug 30
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
84°F |
0 to 5 mph
SE
|
Major City Forecasts
Live forecast snapshots for major cities across Mercer County.
Coverage
Forecast coverage currently spans 6 of 6 mapped cities in Mercer County.
Largest mapped city population in this region: 82,957.
