West Union, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for West Union, a city in Fayette County, Iowa.
Today
75°F
Chance Rain Showers then Chance Showers And Thunderstorms
A chance of rain showers between 8am and 4pm, then a chance of showers and thunderstorms. Mostly cloudy. High near 75, with temperatures falling to around 72 in the afternoon. West wind 6 to 10 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 |
|---|---|---|---|---|
| Today | 75°F | Chance Rain Showers then Chance Showers And Thunderstorms | 6 to 10 mph W | 50% |
| Tonight | 60°F | Showers And Thunderstorms | 6 mph NW | 77% |
| Wednesday | 73°F | Slight Chance Rain Showers then Partly Sunny | 5 mph N | 18% |
| Wednesday Night | 54°F | Mostly Clear | 2 mph NW | 4% |
| Thursday | 77°F | Sunny | 2 mph E | 1% |
| Thursday Night | 59°F | Mostly Clear | 3 mph S | 1% |
| Friday | 80°F | Sunny | 3 to 9 mph S | 5% |
| Friday Night | 63°F | Mostly Clear | 7 mph S | 10% |
| Saturday | 82°F | Mostly Sunny | 8 mph S | 10% |
| Saturday Night | 67°F | Chance Rain Showers | 7 to 12 mph S | 31% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 10 mph S | 31% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 8 mph S | 40% |
| Monday | 81°F | Chance Showers And Thunderstorms | 9 mph S | 40% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 10 mph NE | 36% |
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 Aug 4, 2026.