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
50°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. Low around 50, with temperatures rising to around 54 overnight. South wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for West Union
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Chance Rain Showers | 10 mph S | 45% |
| Wednesday | 54°F | Rain Showers Likely | 10 to 16 mph SW | 61% |
| Wednesday Night | 44°F | Rain Showers | 15 mph SW | 87% |
| Thursday | 50°F | Rain Showers | 13 mph NW | 76% |
| Thursday Night | 38°F | Mostly Cloudy | 9 to 13 mph N | 12% |
| Friday | 47°F | Partly Sunny | 3 to 10 mph N | 2% |
| Friday Night | 31°F | Partly Cloudy | 2 mph NW | 0% |
| Saturday | 51°F | Mostly Sunny | 1 to 5 mph W | 1% |
| Saturday Night | 35°F | Partly Cloudy | 2 to 6 mph W | 5% |
| Sunday | 57°F | Sunny | 8 mph W | 10% |
| Sunday Night | 37°F | Mostly Clear | 7 mph SW | 2% |
| Monday | 59°F | Sunny | 7 to 13 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 7 mph W | 1% |
| Tuesday | 58°F | Sunny | 7 mph W | 1% |
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 Nov 4, 2026.