Warren County, IL Weather Forecast
County weather hub
Patchy Fog
Compare major city weather across Warren County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Patchy fog after 3am. Clear, with a low around 70. Northeast wind around 0 mph.
County Weather Overview
This county weather page brings together forecast coverage for Warren County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 1 of 1 mapped cities in Warren County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 15 to Jul 21, 2026
- Latest sync
- Jul 15, 2026 2:51 AM CDT
- Forecast office
- DVN
- Source
- NOAA / NWS
Daily Outlook
This Week in Warren County
Wednesday looks like the warmest upcoming period in Warren County at 91 degrees F.
Monday Night is the coolest period ahead with temperatures near 69 degrees F.
The strongest winds are forecast for Tuesday at about 5 to 15 mph NW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 15, 2026 2:51 AM CDT
- Coverage
- 7 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
Patchy fog before 9am. Sunny, with a high near 91. Heat index values as high as 100. North wind around 0 mph.
Mostly clear, with a low around 71. Heat index values as high as 100. East wind around 0 mph.
A slight chance of rain showers between 1pm and 4pm, then a slight chance of showers and thunderstorms. Sunny, with a high near 90. East wind 0 to 5 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 72.
A chance of showers and thunderstorms between 7am and 1pm, then showers and thunderstorms likely. Mostly sunny, with a high near 90. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms likely before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 72. Chance of precipitation is 70%.
Sunny, with a high near 91.
Mostly clear, with a low around 72.
Sunny, with a high near 89.
Mostly clear, with a low around 71.
A slight chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 90.
A slight chance of rain showers. Partly cloudy, with a low around 69.
A slight chance of rain showers before 7am. Sunny, with a high near 86.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Jul 15
|
Patchy Fog
|
70°F |
0 mph
|
|
Wednesday
Jul 15
|
Patchy Fog then Sunny
|
91°F |
0 mph
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
71°F |
0 mph
|
|
Thursday
Jul 16
|
Sunny then Slight Chance Showers And Thunderstorms
|
90°F |
0 to 5 mph
E
|
|
Thursday Night
Jul 16
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
72°F |
0 mph
|
|
Friday
Jul 17
|
Chance Showers And Thunderstorms
|
90°F |
0 to 5 mph
SW
|
|
Friday Night
Jul 17
|
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
|
72°F |
5 mph
SW
|
|
Saturday
Jul 18
|
Sunny
|
91°F |
5 to 10 mph
W
|
|
Saturday Night
Jul 18
|
Mostly Clear
|
72°F |
5 mph
W
|
|
Sunday
Jul 19
|
Sunny
|
89°F |
5 mph
W
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
71°F |
5 mph
S
|
|
Monday
Jul 20
|
Slight Chance Showers And Thunderstorms
|
90°F |
5 to 10 mph
SW
|
|
Monday Night
Jul 20
|
Slight Chance Rain Showers
|
69°F |
5 to 10 mph
W
|
|
Tuesday
Jul 21
|
Slight Chance Rain Showers then Sunny
|
86°F |
5 to 15 mph
NW
|
Major City Forecasts
Live forecast snapshots for major cities across Warren County.
Coverage
Forecast coverage currently spans 1 of 1 mapped cities in Warren County.
Largest mapped city population in this region: 8,801.
