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Royal Lakes, IL Weather & Growing Conditions

Overnight
72°F
Mostly Clear
Mostly clear, with a low around 72. South wind around 6 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 72°F Mostly Clear 6 mph S 3%
Saturday 95°F Partly Sunny 3 to 7 mph SW 8%
Saturday Night 70°F Partly Cloudy 5 mph SW 5%
Sunday 89°F Chance Rain Showers then Chance Showers And Thunderstorms 2 to 7 mph NW 35%
Sunday Night 62°F Chance Showers And Thunderstorms 7 to 10 mph NE 68%
Monday 75°F Showers And Thunderstorms Likely 8 to 12 mph NE 70%
Monday Night 55°F Chance Showers And Thunderstorms 7 to 12 mph NE 47%
Tuesday 69°F Slight Chance Rain Showers then Partly Sunny 12 mph NE 20%
Tuesday Night 51°F Mostly Cloudy 5 to 12 mph N 11%
Wednesday 72°F Mostly Sunny 9 mph N 1%
Wednesday Night 52°F Partly Cloudy 3 to 8 mph N 0%
Thursday 74°F Mostly Sunny 3 to 7 mph N 1%
Thursday Night 54°F Partly Cloudy 2 to 6 mph NE 4%
Friday 76°F Mostly Sunny 3 to 8 mph NE 4%

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.