Waynesville, IL Weather & Growing Conditions
Tonight
54°F
Rain
Rain before 4am, then a slight chance of rain showers. Cloudy. Low around 54, with temperatures rising to around 59 overnight. South southwest wind 15 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Rain | 15 to 18 mph SSW | 91% |
| Wednesday | 60°F | Slight Chance Rain Showers then Mostly Cloudy | 17 mph SW | 18% |
| Wednesday Night | 45°F | Mostly Cloudy | 14 mph SW | 2% |
| Thursday | 60°F | Mostly Sunny | 12 to 16 mph WSW | 6% |
| Thursday Night | 43°F | Mostly Cloudy then Slight Chance Light Rain | 7 to 10 mph WNW | 20% |
| Friday | 55°F | Slight Chance Light Rain then Mostly Cloudy | 9 to 13 mph NNW | 16% |
| Friday Night | 36°F | Mostly Cloudy | 5 to 12 mph N | 6% |
| Saturday | 53°F | Mostly Sunny | 6 mph NW | 2% |
| Saturday Night | 34°F | Partly Cloudy | 5 mph W | 3% |
| Sunday | 59°F | Sunny | 5 to 12 mph W | 12% |
| Sunday Night | 35°F | Mostly Clear | 6 to 9 mph WNW | 7% |
| Monday | 63°F | Sunny | 6 to 14 mph SW | 3% |
| Monday Night | 40°F | Mostly Clear | 6 to 10 mph WSW | 2% |
| Tuesday | 66°F | Sunny | 8 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Waynesville, IL
Last spring frost
Apr 20
First fall frost
Oct 16
Growing season
179 days
Hardiness zone
6a
Explore more for Waynesville, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Lincoln, Il (14 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.