Johnstown, WI Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Johnstown, WI in one place.
Mostly sunny, with a high near 79. South wind 0 to 10 mph.
Local Weather Overview
This forecast page for Johnstown, 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 11:30 PM CDT.
The active forecast window currently covers Jul 24 to Jul 29, 2026 for Johnstown, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 24 to Jul 29, 2026
- Latest sync
- Jul 22, 2026 11:30 PM CDT
- Forecast office
- MKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Johnstown
Sunday looks like the warmest upcoming period in Johnstown at 90 degrees F.
Friday Night is the coolest period ahead with temperatures near 59 degrees F.
The strongest winds are forecast for Monday at about 5 to 15 mph SW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 22, 2026 11:30 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- MKX
- Radar station
- KMKX
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 59. South wind 5 to 10 mph.
Mostly sunny, with a high near 84. Southwest wind 5 to 10 mph.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 90. West wind 5 to 10 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
A slight chance of rain showers before 1am. Partly cloudy, with a low around 65. Chance of precipitation is 20%.
Mostly sunny, with a high near 85.
Partly cloudy, with a low around 62.
Mostly sunny, with a high near 84.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 24
|
Mostly Sunny
|
79°F |
0 to 10 mph
S
|
|
Friday Night
Jul 24
|
Partly Cloudy
|
59°F |
5 to 10 mph
S
|
|
Saturday
Jul 25
|
Mostly Sunny
|
84°F |
5 to 10 mph
SW
|
|
Saturday Night
Jul 25
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
67°F |
5 to 10 mph
SW
|
|
Sunday
Jul 26
|
Slight Chance Showers And Thunderstorms then Mostly Sunny
|
90°F |
5 to 10 mph
W
|
|
Sunday Night
Jul 26
|
Slight Chance Showers And Thunderstorms
|
68°F |
5 to 10 mph
SW
|
|
Monday
Jul 27
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
89°F |
5 to 15 mph
SW
|
|
Monday Night
Jul 27
|
Slight Chance Rain Showers
|
65°F |
5 to 10 mph
NW
|
|
Tuesday
Jul 28
|
Mostly Sunny
|
85°F |
5 to 10 mph
N
|
|
Tuesday Night
Jul 28
|
Partly Cloudy
|
62°F |
0 to 5 mph
E
|
|
Wednesday
Jul 29
|
Mostly Sunny
|
84°F |
5 to 10 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Johnstown.