Mercer County, IL 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. High near 62, with temperatures falling to around 57 in the afternoon. Southwest wind 5 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 2 of 2 mapped cities in Mercer County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Nov 9 to Nov 15, 2026
- Latest sync
- Nov 9, 2026 2:28 PM CST
- Forecast office
- DVN
- Source
- NOAA / NWS
Daily Outlook
This Week in Mercer County
Tuesday looks like the warmest upcoming period in Mercer County at 63 degrees F.
Friday Night is the coolest period ahead with temperatures near 26 degrees F.
The strongest winds are forecast for Thursday at about 10 to 15 mph N.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Nov 9, 2026 2:28 PM CST
- Coverage
- 8 days
- Time zone
- America/Chicago
- Forecast office
- DVN
- Radar station
- KDVN
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 42. West wind around 5 mph.
Sunny. High near 63, with temperatures falling to around 57 in the afternoon. Northwest wind 0 to 5 mph.
A slight chance of rain showers after 5am. Mostly cloudy, with a low around 42. Southeast wind 0 to 5 mph. Chance of precipitation is 20%.
A chance of rain showers before 9am, then a chance of showers and thunderstorms. Partly sunny, with a high near 57. Chance of precipitation is 40%.
Partly cloudy, with a low around 36.
Partly sunny, with a high near 47.
Partly cloudy, with a low around 28.
Mostly sunny, with a high near 44.
Mostly clear, with a low around 26.
Sunny, with a high near 49.
Mostly clear, with a low around 31.
Mostly sunny, with a high near 54.
Partly cloudy, with a low around 39.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Nov 9
|
Sunny
|
62°F |
5 to 10 mph
SW
|
|
Tonight
Nov 9
|
Mostly Clear
|
42°F |
5 mph
W
|
|
Tuesday
Nov 10
|
Sunny
|
63°F |
0 to 5 mph
NW
|
|
Tuesday Night
Nov 10
|
Mostly Cloudy then Slight Chance Rain Showers
|
42°F |
0 to 5 mph
SE
|
|
Veterans Day
Nov 11
|
Chance Showers And Thunderstorms
|
57°F |
5 to 10 mph
E
|
|
Wednesday Night
Nov 11
|
Partly Cloudy
|
36°F |
10 mph
N
|
|
Thursday
Nov 12
|
Partly Sunny
|
47°F |
10 to 15 mph
N
|
|
Thursday Night
Nov 12
|
Partly Cloudy
|
28°F |
5 to 10 mph
N
|
|
Friday
Nov 13
|
Mostly Sunny
|
44°F |
5 to 10 mph
N
|
|
Friday Night
Nov 13
|
Mostly Clear
|
26°F |
0 to 5 mph
N
|
|
Saturday
Nov 14
|
Sunny
|
49°F |
0 to 5 mph
NW
|
|
Saturday Night
Nov 14
|
Mostly Clear
|
31°F |
0 to 5 mph
SE
|
|
Sunday
Nov 15
|
Mostly Sunny
|
54°F |
5 to 10 mph
SE
|
|
Sunday Night
Nov 15
|
Partly Cloudy
|
39°F |
5 mph
SE
|
Major City Forecasts
Live forecast snapshots for major cities across Mercer County.
Coverage
Forecast coverage currently spans 2 of 2 mapped cities in Mercer County.
Largest mapped city population in this region: 3,383.
