Union, WI Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Union, WI in one place.
Mostly sunny, with a high near 82. South wind 5 to 15 mph.
Local Weather Overview
This forecast page for Union, 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 23, 2026 12:06 PM CDT.
The active forecast window currently covers Jul 24 to Jul 29, 2026 for Union, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 24 to Jul 29, 2026
- Latest sync
- Jul 23, 2026 12:06 PM CDT
- Forecast office
- MPX
- Source
- NOAA / NWS
Daily Outlook
This Week in Union
Sunday looks like the warmest upcoming period in Union at 93 degrees F.
Friday Night is the coolest period ahead with temperatures near 64 degrees F.
The strongest winds are forecast for Friday at about 5 to 15 mph S.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 23, 2026 12:06 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- MPX
- Radar station
- KARX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly cloudy, with a low around 64. South southwest wind 10 to 15 mph.
Mostly sunny, with a high near 90. West southwest wind around 10 mph.
Mostly clear, with a low around 68. Southwest wind 0 to 10 mph.
A slight chance of showers and thunderstorms between 7am and 1pm. Mostly sunny, with a high near 93. South wind 5 to 10 mph. Chance of precipitation is 20%.
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 71. South wind 5 to 10 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 7am. Sunny, with a high near 93. West wind around 10 mph. Chance of precipitation is 40%.
Mostly clear, with a low around 66. North wind 0 to 10 mph.
Sunny, with a high near 89. North wind 0 to 5 mph.
Mostly clear, with a low around 65. Northeast wind 0 to 5 mph.
Sunny, with a high near 89. East northeast wind 0 to 5 mph.
Mostly clear, with a low around 64. East wind 0 to 5 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 24
|
Mostly Sunny
|
82°F |
5 to 15 mph
S
|
|
Friday Night
Jul 24
|
Mostly Cloudy
|
64°F |
10 to 15 mph
SSW
|
|
Saturday
Jul 25
|
Mostly Sunny
|
90°F |
10 mph
WSW
|
|
Saturday Night
Jul 25
|
Mostly Clear
|
68°F |
0 to 10 mph
SW
|
|
Sunday
Jul 26
|
Slight Chance Showers And Thunderstorms
|
93°F |
5 to 10 mph
S
|
|
Sunday Night
Jul 26
|
Chance Showers And Thunderstorms
|
71°F |
5 to 10 mph
S
|
|
Monday
Jul 27
|
Chance Showers And Thunderstorms then Sunny
|
93°F |
10 mph
W
|
|
Monday Night
Jul 27
|
Mostly Clear
|
66°F |
0 to 10 mph
N
|
|
Tuesday
Jul 28
|
Sunny
|
89°F |
0 to 5 mph
N
|
|
Tuesday Night
Jul 28
|
Mostly Clear
|
65°F |
0 to 5 mph
NE
|
|
Wednesday
Jul 29
|
Sunny
|
89°F |
0 to 5 mph
ENE
|
|
Wednesday Night
Jul 29
|
Mostly Clear
|
64°F |
0 to 5 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Union.