DeKalb County, IL Weather Forecast
County weather hub
Showers And Thunderstorms Likely
Compare major city weather across DeKalb County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Showers and thunderstorms likely. Partly sunny, with a high near 71.
County Weather Overview
This county weather page brings together forecast coverage for DeKalb 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 DeKalb County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Apr 15, 2026
- Latest sync
- Apr 9, 2026 4:32 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in DeKalb County
Wednesday looks like the warmest upcoming period in DeKalb County at 71 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Wednesday at about 15 to 20 mph SW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 4:32 PM CDT
- Coverage
- 1 day
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KLOT
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms. Mostly cloudy, with a low around 50.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 15
|
Showers And Thunderstorms Likely
|
71°F |
15 to 20 mph
SW
|
|
Wednesday Night
Apr 15
|
Chance Showers And Thunderstorms
|
50°F |
10 to 15 mph
WSW
|
Major City Forecasts
Live forecast snapshots for major cities across DeKalb County.
Coverage
Forecast coverage currently spans 6 of 6 mapped cities in DeKalb County.
Largest mapped city population in this region: 42,621.
