Royal, IL Weather & Growing Conditions
Today
65°F
Chance Light Rain then Slight Chance Drizzle
A chance of rain before 8am, then a slight chance of drizzle. Mostly cloudy. High near 65, with temperatures falling to around 59 in the afternoon. Southwest wind 12 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 65°F | Chance Light Rain then Slight Chance Drizzle | 12 to 15 mph SW | 29% |
| Tonight | 45°F | Slight Chance Drizzle then Mostly Cloudy | 12 mph SW | 10% |
| Thursday | 61°F | Mostly Cloudy then Slight Chance Light Rain | 10 to 15 mph WSW | 15% |
| Thursday Night | 44°F | Chance Light Rain | 6 mph WNW | 25% |
| Friday | 54°F | Mostly Cloudy | 7 to 10 mph NNW | 12% |
| Friday Night | 35°F | Partly Cloudy | 3 to 8 mph NNW | 0% |
| Saturday | 53°F | Sunny | 5 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 2 mph WNW | 1% |
| Sunday | 59°F | Sunny | 2 to 7 mph W | 1% |
| Sunday Night | 34°F | Clear | 3 mph W | 0% |
| Monday | 63°F | Sunny | 1 to 6 mph SW | 0% |
| Monday Night | 39°F | Clear | 3 mph WSW | 1% |
| Tuesday | 66°F | Sunny | 5 mph WNW | 1% |
| Tuesday Night | 39°F | Mostly Clear | 2 mph NNW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Royal, IL
Last spring frost
Apr 20
First fall frost
Oct 21
Growing season
182 days
Hardiness zone
6a
Explore more for Royal, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Ogden, Il (7.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.