Johnstown, WI Weather Forecast
Local 7-day forecast
Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Johnstown, WI in one place.
Partly sunny, with a high near 66. East wind around 5 mph. New rainfall amounts less than a tenth of an inch possible.
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: Sep 25, 2026 12:27 PM CDT.
The active forecast window currently covers Sep 25 to Oct 1, 2026 for Johnstown, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 25 to Oct 1, 2026
- Latest sync
- Sep 25, 2026 12:27 PM CDT
- Forecast office
- MKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Johnstown
Monday looks like the warmest upcoming period in Johnstown at 69 degrees F.
Tonight is the coolest period ahead with temperatures near 48 degrees F.
The strongest winds are forecast for Tuesday at about 0 to 10 mph S.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 25, 2026 12:27 PM CDT
- Coverage
- 7 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 48. East wind 0 to 5 mph.
Mostly sunny, with a high near 67. East wind around 5 mph.
Mostly cloudy, with a low around 48. East wind 0 to 5 mph.
Partly sunny, with a high near 67. East wind around 0 mph.
Partly cloudy, with a low around 49. Northeast wind around 0 mph.
Mostly sunny, with a high near 69. East wind around 0 mph.
Partly cloudy, with a low around 52. Southeast wind around 0 mph.
A chance of rain showers after 1pm. Partly sunny, with a high near 69. Chance of precipitation is 30%.
Rain showers likely. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Rain showers likely. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.
A chance of rain showers. Mostly cloudy, with a low around 57. Chance of precipitation is 40%.
A chance of rain showers. Partly sunny, with a high near 68. Chance of precipitation is 40%.
A chance of rain showers. Mostly cloudy, with a low around 56. Chance of precipitation is 40%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Sep 25
|
Partly Sunny
|
66°F |
5 mph
E
|
|
Tonight
Sep 25
|
Partly Cloudy
|
48°F |
0 to 5 mph
E
|
|
Saturday
Sep 26
|
Mostly Sunny
|
67°F |
5 mph
E
|
|
Saturday Night
Sep 26
|
Mostly Cloudy
|
48°F |
0 to 5 mph
E
|
|
Sunday
Sep 27
|
Partly Sunny
|
67°F |
0 mph
|
|
Sunday Night
Sep 27
|
Partly Cloudy
|
49°F |
0 mph
|
|
Monday
Sep 28
|
Mostly Sunny
|
69°F |
0 mph
|
|
Monday Night
Sep 28
|
Partly Cloudy
|
52°F |
0 mph
|
|
Tuesday
Sep 29
|
Partly Sunny then Chance Rain Showers
|
69°F |
0 to 10 mph
S
|
|
Tuesday Night
Sep 29
|
Rain Showers Likely
|
58°F |
10 mph
S
|
|
Wednesday
Sep 30
|
Rain Showers Likely
|
68°F |
10 mph
SW
|
|
Wednesday Night
Sep 30
|
Chance Rain Showers
|
57°F |
5 mph
S
|
|
Thursday
Oct 1
|
Chance Rain Showers
|
68°F |
5 to 10 mph
SW
|
|
Thursday Night
Oct 1
|
Chance Rain Showers
|
56°F |
5 to 10 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Johnstown.