Mercer County, OH Weather Forecast
County weather hub
Areas Of Smoke
Compare major city weather across Mercer County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Areas of smoke. Sunny, with a high near 92. North wind around 5 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 4 of 4 mapped cities in Mercer County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 16 to Jul 22, 2026
- Latest sync
- Jul 16, 2026 3:21 PM EDT
- Forecast office
- ILN
- Source
- NOAA / NWS
Daily Outlook
This Week in Mercer County
This Afternoon looks like the warmest upcoming period in Mercer County at 92 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 58 degrees F.
The strongest winds are forecast for Tuesday at about 10 to 15 mph W.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 16, 2026 3:21 PM EDT
- Coverage
- 7 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
Areas of smoke. Mostly clear, with a low around 71. East wind around 3 mph.
Areas of smoke before noon, then areas of smoke and a chance of showers and thunderstorms. Mostly sunny, with a high near 88. South wind around 6 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Areas of smoke and showers and thunderstorms likely before 8pm, then areas of smoke and a chance of showers and thunderstorms between 8pm and 3am, then a chance of showers and thunderstorms between 3am and 5am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Southwest wind 3 to 7 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and thunderstorms. Partly sunny, with a high near 87. West wind 8 to 14 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 66. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Mostly sunny, with a high near 82.
Mostly clear, with a low around 62.
Mostly sunny, with a high near 85.
A slight chance of showers and thunderstorms between 8pm and 2am, then showers and thunderstorms likely. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Showers and thunderstorms likely before 8am, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 60%.
A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 63. Chance of precipitation is 40%.
Sunny, with a high near 77.
Mostly clear, with a low around 58.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Jul 16
|
Areas Of Smoke
|
92°F |
5 mph
N
|
|
Tonight
Jul 16
|
Areas Of Smoke
|
71°F |
3 mph
E
|
|
Friday
Jul 17
|
Areas Of Smoke
|
88°F |
6 mph
S
|
|
Friday Night
Jul 17
|
Areas Of Smoke
|
72°F |
3 to 7 mph
SW
|
|
Saturday
Jul 18
|
Chance Showers And Thunderstorms
|
87°F |
8 to 14 mph
W
|
|
Saturday Night
Jul 18
|
Showers And Thunderstorms then Chance Showers And Thunderstorms
|
66°F |
5 to 13 mph
NW
|
|
Sunday
Jul 19
|
Mostly Sunny
|
82°F |
7 mph
NE
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
62°F |
5 mph
E
|
|
Monday
Jul 20
|
Mostly Sunny
|
85°F |
2 to 7 mph
S
|
|
Monday Night
Jul 20
|
Slight Chance Showers And Thunderstorms
|
70°F |
5 to 10 mph
SW
|
|
Tuesday
Jul 21
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
86°F |
10 to 15 mph
W
|
|
Tuesday Night
Jul 21
|
Chance Showers And Thunderstorms
|
63°F |
8 to 14 mph
NW
|
|
Wednesday
Jul 22
|
Sunny
|
77°F |
10 mph
NW
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
58°F |
2 to 8 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.
