Greenville, IL Weather & Growing Conditions
Tonight
70°F
Partly Cloudy
Partly cloudy, with a low around 70. Southeast wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 70°F | Partly Cloudy | 7 mph SE | 12% |
| Saturday | 96°F | Mostly Sunny | 2 to 6 mph SW | 6% |
| Saturday Night | 71°F | Partly Cloudy | 3 mph S | 3% |
| Sunday | 92°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 1 to 6 mph W | 20% |
| Sunday Night | 64°F | Chance Showers And Thunderstorms | 7 mph N | 48% |
| Monday | 79°F | Showers And Thunderstorms Likely | 6 to 10 mph NE | 61% |
| Monday Night | 58°F | Showers And Thunderstorms Likely | 6 to 12 mph NE | 61% |
| Tuesday | 72°F | Slight Chance Rain Showers then Partly Sunny | 10 mph N | 24% |
| Tuesday Night | 53°F | Mostly Cloudy | 5 to 10 mph N | 5% |
| Wednesday | 74°F | Mostly Sunny | 6 to 9 mph N | 3% |
| Wednesday Night | 54°F | Partly Cloudy | 2 to 8 mph N | 3% |
| Thursday | 75°F | Mostly Sunny | 2 to 8 mph N | 2% |
| Thursday Night | 56°F | Partly Cloudy | 2 to 7 mph N | 2% |
| Friday | 76°F | Mostly Sunny | 2 to 7 mph N | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Greenville, IL
Last spring frost
Apr 10
First fall frost
Oct 24
Growing season
196 days
Hardiness zone
6b
Explore more for Greenville, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Vandalia, Il (18.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.