West Union, IA Weather & Growing Conditions
Today
75°F
Isolated Rain Showers then Scattered Showers And Thunderstorms
Isolated rain showers before 3pm, then scattered showers and thunderstorms. Mostly cloudy. High near 75, with temperatures falling to around 71 in the afternoon. West wind 6 to 10 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Isolated Rain Showers then Scattered Showers And Thunderstorms | 6 to 10 mph W | 38% |
| Tonight | 60°F | Scattered Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 mph NW | 65% |
| Wednesday | 73°F | Slight Chance Rain Showers then Partly Sunny | 5 mph N | 18% |
| Wednesday Night | 54°F | Mostly Clear | 3 mph NW | 3% |
| Thursday | 77°F | Sunny | 2 mph E | 1% |
| Thursday Night | 59°F | Mostly Clear | 3 mph S | 1% |
| Friday | 79°F | Sunny | 3 to 10 mph S | 5% |
| Friday Night | 63°F | Mostly Clear | 8 mph S | 10% |
| Saturday | 81°F | Mostly Sunny | 8 mph S | 10% |
| Saturday Night | 67°F | Chance Rain Showers | 7 to 10 mph S | 32% |
| Sunday | 82°F | Chance Showers And Thunderstorms | 10 mph S | 32% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 8 mph S | 39% |
| Monday | 81°F | Chance Showers And Thunderstorms | 10 mph S | 39% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 9 mph NE | 36% |
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 Aug 4, 2026.