Royal Lakes, IL Weather & Growing Conditions
Today
58°F
Slight Chance Drizzle
A slight chance of drizzle before 2pm. Mostly cloudy, with a high near 58. West wind 9 to 14 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 58°F | Slight Chance Drizzle | 9 to 14 mph W | 12% |
| Tonight | 42°F | Partly Cloudy | 7 mph SW | 1% |
| Thursday | 62°F | Mostly Sunny | 7 to 12 mph W | 0% |
| Thursday Night | 42°F | Mostly Cloudy | 6 mph NW | 1% |
| Friday | 55°F | Partly Sunny | 7 to 10 mph N | 2% |
| Friday Night | 32°F | Partly Cloudy | 2 to 7 mph N | 0% |
| Saturday | 54°F | Mostly Sunny | 3 mph NW | 0% |
| Saturday Night | 31°F | Partly Cloudy | 2 mph NW | 0% |
| Sunday | 60°F | Sunny | 2 to 6 mph NW | 1% |
| Sunday Night | 33°F | Clear | 2 mph W | 0% |
| Monday | 64°F | Sunny | 1 to 6 mph SW | 0% |
| Monday Night | 38°F | Clear | 3 mph SW | 0% |
| Tuesday | 67°F | Sunny | 5 mph W | 1% |
| Tuesday Night | 39°F | Mostly Clear | 2 mph N | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Royal Lakes, IL
Last spring frost
Apr 14
First fall frost
Oct 21
Growing season
188 days
Hardiness zone
6b
Explore more for Royal Lakes, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Carlinville, Il (12.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.