Harman US

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

WhenTempForecastWindPrecip
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.