West Union, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for West Union, a city in Fayette County, Iowa.
Tonight
62°F
Chance Showers And Thunderstorms then Showers And Thunderstorms
A chance of showers and thunderstorms before midnight, then showers and thunderstorms. Cloudy, with a low around 62. East wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for West Union
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 62°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 14 mph E | 89% |
| Saturday | 72°F | Showers And Thunderstorms Likely | 7 to 10 mph S | 72% |
| Saturday Night | 57°F | Showers And Thunderstorms Likely | 8 to 13 mph N | 58% |
| Sunday | 65°F | Chance Rain Showers | 15 mph NE | 43% |
| Sunday Night | 52°F | Mostly Cloudy | 14 mph NE | 14% |
| Monday | 60°F | Chance Rain Showers | 14 mph NE | 45% |
| Monday Night | 47°F | Chance Rain Showers | 8 to 13 mph NE | 45% |
| Tuesday | 59°F | Chance Rain Showers then Partly Sunny | 10 mph NE | 31% |
| Tuesday Night | 44°F | Partly Cloudy | 6 mph NE | 4% |
| Wednesday | 64°F | Sunny | 6 mph NE | 0% |
| Wednesday Night | 49°F | Partly Cloudy | 2 mph E | 2% |
| Thursday | 66°F | Partly Sunny | 3 mph SE | 10% |
| Thursday Night | 51°F | Partly Cloudy | 2 mph E | 6% |
| Friday | 67°F | Mostly Sunny | 5 mph E | 4% |
Forecast source: National Weather Service (api.weather.gov) for West Union (42.959, -91.813). Updated through the day.
Growing snapshot for West Union
Last spring frost
May 4
First fall frost
Oct 4
Growing season
151 days
Hardiness zone
5a
More local growing data for West Union: nearby ZIP 52175 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Arlington
Clermont
Elgin
Fayette
Hawkeye
Jackson Junction
Maynard
Oelwein
Randalia
St. Lucas
Stanley
Wadena
Waucoma
Westgate
Climate data from the nearest NOAA station, Fayette, Ia (7.7 mi from West Union). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.