Winnebago County, WI Weather Forecast
County weather hub
Sunny
Compare major city weather across Winnebago County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 89. Heat index values as high as 89. Southwest wind around 9 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 6 of 6 mapped cities in Winnebago County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- May 26 to May 31, 2026
- Latest sync
- May 24, 2026 10:44 PM CDT
- Forecast office
- GRB
- Source
- NOAA / NWS
Daily Outlook
This Week in Winnebago County
Tuesday looks like the warmest upcoming period in Winnebago County at 89 degrees F.
Saturday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Saturday at about 5 to 10 mph E.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- May 24, 2026 10:44 PM CDT
- Coverage
- 6 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
A slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 61. West northwest wind 2 to 7 mph. Chance of precipitation is 20%.
A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 56. Chance of precipitation is 30%.
Sunny, with a high near 77.
Mostly clear, with a low around 55.
Mostly sunny, with a high near 79.
Partly cloudy, with a low around 56.
Mostly sunny, with a high near 76.
Partly cloudy, with a low around 54.
Mostly sunny, with a high near 77.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
May 26
|
Sunny
|
89°F |
9 mph
SW
|
|
Tuesday Night
May 26
|
Slight Chance Showers And Thunderstorms
|
61°F |
2 to 7 mph
WNW
|
|
Wednesday
May 27
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
85°F |
3 to 9 mph
NE
|
|
Wednesday Night
May 27
|
Chance Showers And Thunderstorms then Partly Cloudy
|
56°F |
9 mph
ENE
|
|
Thursday
May 28
|
Sunny
|
77°F |
8 mph
ENE
|
|
Thursday Night
May 28
|
Mostly Clear
|
55°F |
2 to 7 mph
SE
|
|
Friday
May 29
|
Mostly Sunny
|
79°F |
2 to 7 mph
ESE
|
|
Friday Night
May 29
|
Partly Cloudy
|
56°F |
7 mph
ESE
|
|
Saturday
May 30
|
Mostly Sunny
|
76°F |
5 to 10 mph
E
|
|
Saturday Night
May 30
|
Partly Cloudy
|
54°F |
5 to 10 mph
E
|
|
Sunday
May 31
|
Mostly Sunny
|
77°F |
6 to 9 mph
ENE
|
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.
