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Royal Lakes, IL Weather & Growing Conditions

Tonight
70°F
Partly Cloudy
Partly cloudy, with a low around 70. Southeast wind around 8 mph.

7-day forecast

WhenTempForecastWindPrecip
Tonight 70°F Partly Cloudy 8 mph SE 12%
Saturday 96°F Mostly Sunny 5 to 8 mph SW 6%
Saturday Night 70°F Partly Cloudy 5 mph SW 8%
Sunday 90°F Chance Rain Showers then Chance Showers And Thunderstorms 2 to 7 mph NW 35%
Sunday Night 62°F Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 6 to 9 mph NE 64%
Monday 77°F Showers And Thunderstorms Likely 7 to 12 mph NE 64%
Monday Night 56°F Showers And Thunderstorms Likely 7 to 12 mph NE 60%
Tuesday 70°F Slight Chance Rain Showers then Mostly Cloudy 12 mph NE 24%
Tuesday Night 51°F Mostly Cloudy 5 to 12 mph N 4%
Wednesday 73°F Mostly Sunny 8 mph N 2%
Wednesday Night 52°F Partly Cloudy 2 to 7 mph N 2%
Thursday 75°F Mostly Sunny 3 to 7 mph N 4%
Thursday Night 54°F Partly Cloudy 2 to 6 mph NE 3%
Friday 76°F Mostly Sunny 3 to 7 mph NE 5%

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 Sep 19, 2026.