Winnebago County, WI Weather Forecast
County weather hub
Chance Rain Showers then 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 chance of rain showers before 1pm, then showers and thunderstorms. Some of the storms could be severe and produce heavy rain. Cloudy. High near 83, with temperatures falling to around 76 in the afternoon. Heat index values as high as 84. South southeast wind 6 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
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
- Jun 11 to Jun 17, 2026
- Latest sync
- Jun 11, 2026 1:31 PM CDT
- Forecast office
- GRB
- Source
- NOAA / NWS
Daily Outlook
This Week in Winnebago County
Today looks like the warmest upcoming period in Winnebago County at 83 degrees F.
Sunday Night is the coolest period ahead with temperatures near 52 degrees F.
The strongest winds are forecast for Tonight at about 12 to 18 mph WSW.
Precipitation is mentioned in 12 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 11, 2026 1:31 PM CDT
- Coverage
- 7 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
Showers and thunderstorms before 7pm, then showers and thunderstorms likely between 7pm and 8pm, then a chance of showers and thunderstorms between 8pm and 11pm. Some of the storms could be severe and produce heavy rain. Mostly cloudy, with a low around 57. West southwest wind 12 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Sunny, with a high near 79. Heat index values as high as 79. West wind 10 to 17 mph, with gusts as high as 29 mph.
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 60. West southwest wind 7 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 1pm, then showers and thunderstorms likely. Mostly sunny, with a high near 81. West southwest wind 10 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Showers and thunderstorms likely. Partly cloudy, with a low around 55. Chance of precipitation is 60%.
A slight chance of rain showers before 7am. Sunny, with a high near 70. Chance of precipitation is 20%.
Mostly clear, with a low around 52.
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 72. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 53. 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 71. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 52. Chance of precipitation is 30%.
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 75. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 57. Chance of precipitation is 50%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Jun 11
|
Chance Rain Showers then Showers And Thunderstorms
|
83°F |
6 to 15 mph
SSE
|
|
Tonight
Jun 11
|
Showers And Thunderstorms then Mostly Cloudy
|
57°F |
12 to 18 mph
WSW
|
|
Friday
Jun 12
|
Sunny
|
79°F |
10 to 17 mph
W
|
|
Friday Night
Jun 12
|
Mostly Clear then Slight Chance Showers And Thunderstorms
|
60°F |
7 to 14 mph
WSW
|
|
Saturday
Jun 13
|
Slight Chance Showers And Thunderstorms
|
81°F |
10 to 16 mph
WSW
|
|
Saturday Night
Jun 13
|
Showers And Thunderstorms Likely
|
55°F |
8 to 13 mph
WNW
|
|
Sunday
Jun 14
|
Slight Chance Rain Showers then Sunny
|
70°F |
10 to 17 mph
WNW
|
|
Sunday Night
Jun 14
|
Mostly Clear
|
52°F |
8 to 14 mph
W
|
|
Monday
Jun 15
|
Sunny then Slight Chance Showers And Thunderstorms
|
72°F |
10 to 15 mph
W
|
|
Monday Night
Jun 15
|
Slight Chance Showers And Thunderstorms
|
53°F |
5 to 13 mph
WSW
|
|
Tuesday
Jun 16
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
71°F |
7 to 12 mph
W
|
|
Tuesday Night
Jun 16
|
Chance Showers And Thunderstorms then Partly Cloudy
|
52°F |
5 to 10 mph
WSW
|
|
Wednesday
Jun 17
|
Mostly Sunny then Chance Showers And Thunderstorms
|
75°F |
6 to 9 mph
SW
|
|
Wednesday Night
Jun 17
|
Chance Showers And Thunderstorms
|
57°F |
9 mph
SW
|
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.
