Waynesville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Waynesville, a village in De Witt County, Illinois.
Today
85°F
Sunny
Sunny, with a high near 85. South wind around 7 mph.
7-day forecast for Waynesville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 7 mph S | 0% |
| Tonight | 67°F | Partly Cloudy | 6 mph SSE | 0% |
| Wednesday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 8 mph S | 23% |
| Wednesday Night | 67°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms | 7 mph SE | 80% |
| Thursday | 81°F | Showers And Thunderstorms | 7 mph SSW | 80% |
| Thursday Night | 65°F | Slight Chance Showers And Thunderstorms | 6 mph S | 18% |
| Friday | 83°F | Mostly Sunny | 5 mph SSW | 8% |
| Friday Night | 66°F | Slight Chance Showers And Thunderstorms | 5 mph SSE | 24% |
| Saturday | 85°F | Mostly Sunny | 5 to 8 mph SSW | 12% |
| Saturday Night | 70°F | Mostly Clear | 9 mph S | 12% |
| Sunday | 87°F | Sunny | 9 to 14 mph SSW | 8% |
| Sunday Night | 72°F | Partly Cloudy | 9 to 14 mph SSW | 12% |
| Monday | 88°F | Slight Chance Showers And Thunderstorms | 9 to 13 mph SSW | 15% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 12 mph SSW | 27% |
Forecast source: National Weather Service (api.weather.gov) for Waynesville (40.241, -89.124). Updated through the day.
Growing snapshot for Waynesville
Last spring frost
Apr 20
First fall frost
Oct 16
Growing season
179 days
Hardiness zone
6a
More local growing data for Waynesville: nearby ZIP 61778 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Lincoln, Il (14 mi from Waynesville). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.