West Union, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for West Union, a community in Clark County, Illinois.
Today
84°F
Patchy Fog then Sunny
Patchy fog before 9am. Sunny, with a high near 84. East wind around 3 mph.
7-day forecast for West Union
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Patchy Fog then Sunny | 3 mph E | 0% |
| Tonight | 63°F | Mostly Clear | 2 mph SE | 0% |
| Wednesday | 86°F | Sunny | 0 to 5 mph SSE | 0% |
| Wednesday Night | 67°F | Partly Cloudy then Slight Chance Rain Showers | 3 mph S | 21% |
| Thursday | 84°F | Chance Showers And Thunderstorms | 3 to 7 mph SSW | 42% |
| Thursday Night | 68°F | Chance Showers And Thunderstorms | 5 mph SSW | 45% |
| Friday | 84°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 29% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 1 to 5 mph SSW | 29% |
| Saturday | 85°F | Slight Chance Showers And Thunderstorms | 2 to 6 mph SSW | 20% |
| Saturday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SSW | 18% |
| Sunday | 87°F | Mostly Sunny | 5 to 10 mph SSW | 10% |
| Sunday Night | 72°F | Mostly Clear | 9 mph SSW | 10% |
| Monday | 89°F | Mostly Sunny | 10 mph SW | 14% |
| Monday Night | 72°F | Chance Showers And Thunderstorms | 8 mph SSW | 26% |
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 Aug 4, 2026.