Winnebago County, WI Weather Forecast
County weather hub
Slight Chance Showers And Thunderstorms
Compare major city weather across Winnebago County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A slight chance of rain showers before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Sunny, with a high near 87. Chance of precipitation is 20%.
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 6 of 6 mapped cities in Winnebago County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 18 to Jul 21, 2026
- Latest sync
- Jul 15, 2026 4:14 PM CDT
- Forecast office
- GRB
- Source
- NOAA / NWS
Daily Outlook
This Week in Winnebago County
Saturday looks like the warmest upcoming period in Winnebago County at 87 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 58 degrees F.
The strongest winds are forecast for Monday at about 9 to 16 mph WSW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 15, 2026 4:14 PM CDT
- Coverage
- 4 days
- Time zone
- America/Chicago
- Forecast office
- GRB
- Radar station
- KGRB
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 62.
Sunny, with a high near 85.
A chance of rain showers after 1am. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
A chance of rain showers before 7am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 64. Chance of precipitation is 50%.
Sunny, with a high near 81.
Mostly clear, with a low around 58.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 18
|
Slight Chance Showers And Thunderstorms
|
87°F |
9 to 13 mph
NW
|
|
Saturday Night
Jul 18
|
Mostly Clear
|
62°F |
5 to 13 mph
NE
|
|
Sunday
Jul 19
|
Sunny
|
85°F |
6 mph
SE
|
|
Sunday Night
Jul 19
|
Partly Cloudy then Chance Rain Showers
|
65°F |
5 to 9 mph
SSW
|
|
Monday
Jul 20
|
Chance Showers And Thunderstorms
|
87°F |
9 to 16 mph
WSW
|
|
Monday Night
Jul 20
|
Chance Showers And Thunderstorms
|
64°F |
10 to 15 mph
NW
|
|
Tuesday
Jul 21
|
Sunny
|
81°F |
10 to 14 mph
NNW
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
58°F |
7 to 14 mph
NW
|
Major City Forecasts
Live forecast snapshots for major cities across Winnebago County.
Coverage
Forecast coverage currently spans 6 of 6 mapped cities in Winnebago County.
Largest mapped city population in this region: 15,603.
