West Union, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for West Union, a community in Clark County, Illinois.
Overnight
69°F
Mostly Cloudy
Mostly cloudy, with a low around 69. East southeast wind around 5 mph.
7-day forecast for West Union
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 69°F | Mostly Cloudy | 5 mph ESE | 12% |
| Saturday | 94°F | Chance Showers And Thunderstorms | 5 to 8 mph SSW | 42% |
| Saturday Night | 70°F | Mostly Cloudy | 6 mph SSE | 10% |
| Sunday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 9 mph NW | 27% |
| Sunday Night | 62°F | Chance Showers And Thunderstorms | 12 mph NE | 55% |
| Monday | 75°F | Showers And Thunderstorms Likely | 13 mph NE | 70% |
| Monday Night | 56°F | Showers And Thunderstorms Likely | 9 to 14 mph NE | 63% |
| Tuesday | 71°F | Chance Showers And Thunderstorms | 13 mph NNE | 29% |
| Tuesday Night | 54°F | Chance Showers And Thunderstorms then Mostly Cloudy | 7 to 13 mph NNE | 29% |
| Wednesday | 72°F | Partly Sunny | 10 mph N | 7% |
| Wednesday Night | 54°F | Partly Cloudy | 5 to 9 mph N | 5% |
| Thursday | 73°F | Mostly Sunny | 9 mph N | 3% |
| Thursday Night | 56°F | Partly Cloudy | 5 to 8 mph NNE | 4% |
| Friday | 75°F | Mostly Sunny | 6 to 10 mph NNE | 2% |
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 Sep 19, 2026.