West Union, IA Weather & Growing Conditions
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 10 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 62°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 10 to 14 mph E | 89% |
| Saturday | 72°F | Showers And Thunderstorms Likely | 7 to 12 mph S | 70% |
| Saturday Night | 57°F | Chance Showers And Thunderstorms | 8 to 13 mph N | 53% |
| Sunday | 65°F | Chance Rain Showers | 16 mph NE | 40% |
| Sunday Night | 52°F | Mostly Cloudy | 14 mph NE | 13% |
| 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 | 7 to 10 mph NE | 30% |
| Tuesday Night | 44°F | Partly Cloudy | 6 mph NE | 4% |
| Wednesday | 63°F | Sunny | 5 mph E | 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 | 1 mph E | 6% |
| Friday | 67°F | Mostly Sunny | 1 to 5 mph E | 4% |
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 Sep 19, 2026.