Mercer County, OH Weather Forecast
County weather hub
Chance Rain Showers
Compare major city weather across Mercer County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of rain showers. Mostly cloudy, with a high near 71. Chance of precipitation is 50%.
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 4 of 4 mapped cities in Mercer County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 15 to Oct 17, 2026
- Latest sync
- Oct 11, 2026 4:15 AM EDT
- Forecast office
- ILN
- Source
- NOAA / NWS
Daily Outlook
This Week in Mercer County
Thursday looks like the warmest upcoming period in Mercer County at 71 degrees F.
Friday Night is the coolest period ahead with temperatures near 42 degrees F.
The strongest winds are forecast for Friday at about 12 to 17 mph W.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 11, 2026 4:15 AM EDT
- Coverage
- 3 days
- Time zone
- America/New_York
- Forecast office
- ILN
- Radar station
- KIWX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of rain showers. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.
A chance of rain showers. Mostly cloudy, with a high near 66. Chance of precipitation is 40%.
A slight chance of rain showers before 8pm. Mostly cloudy, with a low around 42.
A slight chance of rain showers after 8am. Mostly sunny, with a high near 58.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Chance Rain Showers
|
71°F |
8 to 12 mph
E
|
|
Thursday Night
Oct 15
|
Chance Rain Showers
|
52°F |
8 to 12 mph
S
|
|
Friday
Oct 16
|
Chance Rain Showers
|
66°F |
12 to 17 mph
W
|
|
Friday Night
Oct 16
|
Slight Chance Rain Showers then Mostly Cloudy
|
42°F |
10 to 16 mph
NW
|
|
Saturday
Oct 17
|
Slight Chance Rain Showers
|
58°F |
10 to 14 mph
NW
|
Major City Forecasts
Live forecast snapshots for major cities across Mercer County.
Coverage
Forecast coverage currently spans 4 of 4 mapped cities in Mercer County.
Largest mapped city population in this region: 10,438.
