Winnebago County, IL Weather Forecast
County weather hub
Mostly Cloudy
Compare major city weather across Winnebago County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly cloudy, with a low around 51. Northeast wind around 5 mph, with gusts as high as 15 mph.
County Weather Overview
This county weather page brings together forecast coverage for Winnebago County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 5 of 5 mapped cities in Winnebago County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Sep 23 to Sep 29, 2026
- Latest sync
- Sep 23, 2026 6:49 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Winnebago County
Tuesday looks like the warmest upcoming period in Winnebago County at 72 degrees F.
Friday Night is the coolest period ahead with temperatures near 48 degrees F.
The strongest winds are forecast for Wednesday at about 5 to 15 mph NE.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 23, 2026 6:49 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KMKX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly cloudy. High near 66, with temperatures falling to around 62 in the afternoon. Northeast wind 5 to 15 mph.
Partly cloudy, with a low around 50. Northeast wind 5 to 10 mph.
Mostly sunny, with a high near 68. East northeast wind 5 to 10 mph.
Mostly cloudy, with a low around 52. East wind 0 to 5 mph, with gusts as high as 10 mph.
Partly sunny, with a high near 66.
Mostly cloudy, with a low around 48.
Partly sunny, with a high near 64.
A slight chance of rain showers after 1am. Mostly cloudy, with a low around 50.
A slight chance of rain showers before 1pm. Mostly cloudy, with a high near 66.
Mostly cloudy, with a low around 51.
Mostly sunny, with a high near 71.
Partly cloudy, with a low around 55.
A chance of rain showers after 7am. Partly sunny, with a high near 72.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Sep 23
|
Mostly Cloudy
|
51°F |
5 mph
NE
|
|
Wednesday
Sep 23
|
Mostly Cloudy
|
66°F |
5 to 15 mph
NE
|
|
Wednesday Night
Sep 23
|
Partly Cloudy
|
50°F |
5 to 10 mph
NE
|
|
Thursday
Sep 24
|
Mostly Sunny
|
68°F |
5 to 10 mph
ENE
|
|
Thursday Night
Sep 24
|
Mostly Cloudy
|
52°F |
0 to 5 mph
E
|
|
Friday
Sep 25
|
Partly Sunny
|
66°F |
5 mph
E
|
|
Friday Night
Sep 25
|
Mostly Cloudy
|
48°F |
5 mph
E
|
|
Saturday
Sep 26
|
Partly Sunny
|
64°F |
5 mph
SE
|
|
Saturday Night
Sep 26
|
Mostly Cloudy then Slight Chance Rain Showers
|
50°F |
0 to 5 mph
SE
|
|
Sunday
Sep 27
|
Slight Chance Rain Showers
|
66°F |
0 to 5 mph
SE
|
|
Sunday Night
Sep 27
|
Mostly Cloudy
|
51°F |
0 mph
|
|
Monday
Sep 28
|
Mostly Sunny
|
71°F |
0 to 5 mph
SE
|
|
Monday Night
Sep 28
|
Partly Cloudy
|
55°F |
5 mph
SSE
|
|
Tuesday
Sep 29
|
Chance Rain Showers
|
72°F |
5 to 15 mph
SSE
|
Major City Forecasts
Live forecast snapshots for major cities across Winnebago County.
Coverage
Forecast coverage currently spans 5 of 5 mapped cities in Winnebago County.
Largest mapped city population in this region: 144,835.
