Royalton, IL Weather & Growing Conditions
Today
88°F
Sunny
Sunny, with a high near 88. East wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Sunny | 3 mph E | 0% |
| Tonight | 64°F | Mostly Clear | 1 to 5 mph SE | 0% |
| Wednesday | 91°F | Patchy Fog then Sunny | 1 to 5 mph S | 1% |
| Wednesday Night | 70°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 1 to 5 mph S | 17% |
| Thursday | 87°F | Chance Showers And Thunderstorms | 1 to 5 mph SSW | 50% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms | 3 mph S | 52% |
| Friday | 88°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 2 to 7 mph SW | 58% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 1 to 5 mph SSW | 50% |
| Saturday | 90°F | Chance Showers And Thunderstorms | 5 mph SW | 32% |
| Saturday Night | 71°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 3 mph SSW | 15% |
| Sunday | 92°F | Sunny | 2 to 10 mph SSW | 10% |
| Sunday Night | 74°F | Mostly Clear | 6 to 9 mph SSW | 8% |
| Monday | 95°F | Sunny | 7 to 14 mph SSW | 8% |
| Monday Night | 76°F | Mostly Clear | 9 to 14 mph SSW | 7% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Royalton, IL
Last spring frost
Apr 6
First fall frost
Oct 22
Growing season
199 days
Hardiness zone
7a
Explore more for Royalton, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Du Quoin 4 Se, Il (7.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.