Johnson, WI Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Johnson, WI in one place.
Sunny, with a high near 80. Heat index values as high as 80. Southwest wind 3 to 10 mph, with gusts as high as 18 mph.
Local Weather Overview
This forecast page for Johnson, WI is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 22, 2026 11:31 PM CDT.
The active forecast window currently covers Jul 24 to Jul 29, 2026 for Johnson, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 24 to Jul 29, 2026
- Latest sync
- Jul 22, 2026 11:31 PM CDT
- Forecast office
- GRB
- Source
- NOAA / NWS
Daily Outlook
This Week in Johnson
Sunday looks like the warmest upcoming period in Johnson at 86 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 58 degrees F.
The strongest winds are forecast for Saturday at about 12 mph WSW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 22, 2026 11:31 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
Partly cloudy, with a low around 61. Southwest wind around 9 mph, with gusts as high as 18 mph.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 1am. Mostly clear, with a low around 64. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 86. Chance of precipitation is 20%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 50%.
A slight chance of rain showers before 7pm. Mostly clear, with a low around 61. Chance of precipitation is 20%.
Mostly sunny, with a high near 83.
Partly cloudy, with a low around 58.
Mostly sunny, with a high near 82.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 24
|
Sunny
|
80°F |
3 to 10 mph
SW
|
|
Friday Night
Jul 24
|
Partly Cloudy
|
61°F |
9 mph
SW
|
|
Saturday
Jul 25
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
83°F |
12 mph
WSW
|
|
Saturday Night
Jul 25
|
Slight Chance Showers And Thunderstorms
|
64°F |
3 to 9 mph
WNW
|
|
Sunday
Jul 26
|
Sunny then Slight Chance Showers And Thunderstorms
|
86°F |
3 to 7 mph
SW
|
|
Sunday Night
Jul 26
|
Chance Showers And Thunderstorms
|
64°F |
6 mph
S
|
|
Monday
Jul 27
|
Chance Showers And Thunderstorms
|
85°F |
5 to 10 mph
W
|
|
Monday Night
Jul 27
|
Slight Chance Rain Showers then Mostly Clear
|
61°F |
5 to 10 mph
NNW
|
|
Tuesday
Jul 28
|
Mostly Sunny
|
83°F |
3 to 7 mph
NNW
|
|
Tuesday Night
Jul 28
|
Partly Cloudy
|
58°F |
3 to 7 mph
NNE
|
|
Wednesday
Jul 29
|
Mostly Sunny
|
82°F |
6 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Johnson.