Union, WI Weather Forecast
Local 7-day forecast
Partly Sunny then Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Union, WI in one place.
Showers and thunderstorms after 1pm. Partly sunny. High near 76, with temperatures falling to around 68 in the afternoon. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
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: Apr 15, 2026 2:45 PM CDT.
The active forecast window currently covers Apr 17 to Apr 21, 2026 for Union, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 17 to Apr 21, 2026
- Latest sync
- Apr 15, 2026 2:45 PM CDT
- Forecast office
- MPX
- Source
- NOAA / NWS
Daily Outlook
This Week in Union
Friday looks like the warmest upcoming period in Union at 76 degrees F.
Saturday Night is the coolest period ahead with temperatures near 27 degrees F.
The strongest winds are forecast for Saturday at about 15 to 20 mph WNW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 2:45 PM CDT
- Coverage
- 5 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
Showers and thunderstorms. Mostly cloudy, with a low around 32. West northwest wind around 15 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
A slight chance of snow showers. Partly sunny, with a high near 43. West northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
A slight chance of snow showers before 7pm. Partly cloudy, with a low around 27. West northwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Mostly sunny, with a high near 48. Northwest wind 10 to 15 mph.
Mostly clear, with a low around 28. Northeast wind 5 to 10 mph.
Sunny, with a high near 61. South southeast wind 5 to 15 mph.
Partly cloudy, with a low around 43. South southwest wind around 10 mph.
Sunny, with a high near 67. West northwest wind around 10 mph.
Mostly clear, with a low around 42. Northwest wind 5 to 10 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Apr 17
|
Partly Sunny then Showers And Thunderstorms
|
76°F |
10 to 15 mph
S
|
|
Friday Night
Apr 17
|
Showers And Thunderstorms
|
32°F |
15 mph
WNW
|
|
Saturday
Apr 18
|
Slight Chance Snow Showers
|
43°F |
15 to 20 mph
WNW
|
|
Saturday Night
Apr 18
|
Slight Chance Snow Showers then Partly Cloudy
|
27°F |
10 to 15 mph
WNW
|
|
Sunday
Apr 19
|
Mostly Sunny
|
48°F |
10 to 15 mph
NW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
28°F |
5 to 10 mph
NE
|
|
Monday
Apr 20
|
Sunny
|
61°F |
5 to 15 mph
SSE
|
|
Monday Night
Apr 20
|
Partly Cloudy
|
43°F |
10 mph
SSW
|
|
Tuesday
Apr 21
|
Sunny
|
67°F |
10 mph
WNW
|
|
Tuesday Night
Apr 21
|
Mostly Clear
|
42°F |
5 to 10 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Union.