West Union, IA Weather & Growing Conditions
Tonight
50°F
Rain Showers Likely
Rain showers likely. Mostly cloudy. Low around 50, with temperatures rising to around 54 overnight. South wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Rain Showers Likely | 10 mph S | 66% |
| Wednesday | 53°F | Rain Showers Likely | 10 to 17 mph SW | 64% |
| Wednesday Night | 44°F | Rain Showers | 13 to 16 mph W | 87% |
| Thursday | 50°F | Rain Showers | 13 mph NW | 76% |
| Thursday Night | 39°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 | 0 to 5 mph W | 1% |
| Saturday Night | 35°F | Partly Cloudy | 2 to 6 mph W | 5% |
| Sunday | 56°F | Sunny | 8 mph W | 11% |
| Sunday Night | 37°F | Mostly Clear | 5 mph SW | 2% |
| Monday | 59°F | Sunny | 6 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). Updated through the day.
Growing snapshot for West Union, IA
Last spring frost
May 4
First fall frost
Oct 4
Growing season
151 days
Hardiness zone
5a
Explore more for West Union, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Fayette, Ia (7.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.