Union Center, WI Weather & Growing Conditions
This Afternoon
68°F
Rain Showers Likely
Rain showers likely. Mostly cloudy. High near 68, with temperatures falling to around 65 in the afternoon. South wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Rain Showers Likely | 10 mph S | 58% |
| Tonight | 55°F | Rain Showers | 8 to 12 mph S | 94% |
| Wednesday | 57°F | Rain Showers Likely | 8 to 14 mph SW | 67% |
| Wednesday Night | 44°F | Rain Showers | 8 to 12 mph SW | 82% |
| Thursday | 53°F | Rain Showers Likely | 9 mph NW | 74% |
| Thursday Night | 35°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph N | 19% |
| Friday | 49°F | Partly Sunny | 2 to 9 mph N | 6% |
| Friday Night | 28°F | Partly Cloudy | 1 mph N | 1% |
| Saturday | 53°F | Mostly Sunny | 0 to 3 mph W | 1% |
| Saturday Night | 31°F | Partly Cloudy | 2 mph W | 7% |
| Sunday | 58°F | Slight Chance Rain Showers | 2 to 8 mph W | 17% |
| Sunday Night | 32°F | Mostly Clear | 3 mph W | 4% |
| Monday | 61°F | Mostly Sunny | 2 to 12 mph SW | 1% |
| Monday Night | 37°F | Mostly Clear | 6 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Union Center, WI
Last spring frost
May 5
First fall frost
Oct 4
Growing season
153 days
Hardiness zone
4b
Explore more for Union Center, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Hillsboro, Wi (4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.