Royalton, IL Weather & Growing Conditions
Overnight
56°F
Slight Chance Rain Showers
A slight chance of rain showers before 3am. Mostly cloudy. Low around 56, with temperatures rising to around 58 overnight. South southwest wind around 8 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Slight Chance Rain Showers | 8 mph SSW | 18% |
| Wednesday | 66°F | Mostly Cloudy | 6 to 12 mph WSW | 9% |
| Wednesday Night | 43°F | Mostly Clear | 3 mph WSW | 0% |
| Thursday | 69°F | Sunny | 3 to 8 mph WSW | 0% |
| Thursday Night | 44°F | Partly Cloudy | 2 mph WNW | 1% |
| Friday | 61°F | Partly Sunny | 3 to 12 mph NNW | 0% |
| Friday Night | 36°F | Partly Cloudy | 2 to 8 mph N | 0% |
| Saturday | 57°F | Mostly Sunny | 2 to 6 mph N | 0% |
| Saturday Night | 33°F | Partly Cloudy | 1 mph NNW | 0% |
| Sunday | 62°F | Sunny | 1 to 7 mph NW | 0% |
| Sunday Night | 34°F | Clear | 2 mph NW | 1% |
| Monday | 66°F | Sunny | 0 to 6 mph SW | 0% |
| Monday Night | 38°F | Clear | 2 mph SW | 1% |
| Tuesday | 70°F | Sunny | 1 to 6 mph W | 1% |
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 Nov 4, 2026.