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 73. West wind 5 to 10 mph, with gusts as high as 25 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
- Oct 9 to Oct 14, 2026
- Latest sync
- Oct 8, 2026 7:04 PM EDT
- Forecast office
- PHI
- Source
- NOAA / NWS
Daily Outlook
This Week in Mercer County
Tuesday looks like the warmest upcoming period in Mercer County at 75 degrees F.
Friday Night is the coolest period ahead with temperatures near 49 degrees F.
The strongest winds are forecast for Friday at about 5 to 10 mph W.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 8, 2026 7:04 PM EDT
- Coverage
- 6 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
Partly cloudy, with a low around 49. Northwest wind 0 to 5 mph.
Mostly sunny, with a high near 72. East wind 0 to 5 mph.
Mostly cloudy, with a low around 55.
Rain showers likely after 8am. Cloudy, with a high near 70. Chance of precipitation is 70%.
Rain showers. Cloudy, with a low around 61. Chance of precipitation is 90%.
Rain showers before 2pm. Mostly cloudy, with a high near 73. Chance of precipitation is 80%.
Mostly cloudy, with a low around 60.
A slight chance of rain showers after 2pm. Mostly sunny, with a high near 75.
A slight chance of rain showers before 2am. Partly cloudy, with a low around 55.
Mostly sunny, with a high near 66.
Partly cloudy, with a low around 49.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Oct 9
|
Sunny
|
73°F |
5 to 10 mph
W
|
|
Friday Night
Oct 9
|
Partly Cloudy
|
49°F |
0 to 5 mph
NW
|
|
Saturday
Oct 10
|
Mostly Sunny
|
72°F |
0 to 5 mph
E
|
|
Saturday Night
Oct 10
|
Mostly Cloudy
|
55°F |
0 to 5 mph
SE
|
|
Sunday
Oct 11
|
Rain Showers Likely
|
70°F |
0 to 10 mph
SE
|
|
Sunday Night
Oct 11
|
Rain Showers
|
61°F |
5 mph
E
|
|
Columbus Day
Oct 12
|
Rain Showers
|
73°F |
5 mph
N
|
|
Monday Night
Oct 12
|
Mostly Cloudy
|
60°F |
0 to 5 mph
NW
|
|
Tuesday
Oct 13
|
Mostly Sunny then Slight Chance Rain Showers
|
75°F |
0 to 10 mph
W
|
|
Tuesday Night
Oct 13
|
Slight Chance Rain Showers
|
55°F |
5 mph
W
|
|
Wednesday
Oct 14
|
Mostly Sunny
|
66°F |
5 to 10 mph
NW
|
|
Wednesday Night
Oct 14
|
Partly Cloudy
|
49°F |
5 mph
NW
|
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.
