West Union, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for West Union, a community in Clark County, Illinois.
Tonight
59°F
Showers And Thunderstorms
Showers and thunderstorms after 7pm. Mostly cloudy, with a low around 59. South wind 14 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for West Union
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Showers And Thunderstorms | 14 to 17 mph S | 93% |
| Wednesday | 67°F | Chance Light Rain then Partly Sunny | 9 to 14 mph SSW | 33% |
| Wednesday Night | 44°F | Mostly Cloudy | 7 mph SW | 0% |
| Thursday | 65°F | Sunny | 6 to 13 mph SW | 0% |
| Thursday Night | 43°F | Mostly Cloudy | 5 mph WNW | 4% |
| Friday | 59°F | Partly Sunny | 3 to 10 mph NNW | 8% |
| Friday Night | 37°F | Partly Cloudy | 5 to 8 mph NNW | 3% |
| Saturday | 56°F | Mostly Sunny | 6 mph NNW | 2% |
| Saturday Night | 33°F | Partly Cloudy | 2 mph WNW | 1% |
| Sunday | 62°F | Mostly Sunny | 2 to 8 mph W | 8% |
| Sunday Night | 32°F | Mostly Clear | 5 mph WNW | 7% |
| Monday | 63°F | Sunny | 2 to 9 mph W | 4% |
| Monday Night | 37°F | Mostly Clear | 6 mph SW | 1% |
| Tuesday | 67°F | Sunny | 3 to 7 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for West Union (39.214, -87.667). Updated through the day.
Growing snapshot for West Union
Last spring frost
Apr 8
First fall frost
Oct 27
Growing season
201 days
Hardiness zone
6b
More local growing data for West Union: nearby ZIP 62477 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Farmersburg Tv-2, In (13.5 mi from West Union). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.