Percy, IL Weather & Growing Conditions
Tonight
57°F
Rain
Rain before 3am, then a slight chance of drizzle. Cloudy, with a low around 57. South wind 7 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 100%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Rain | 7 to 15 mph S | 95% |
| Wednesday | 66°F | Mostly Cloudy | 5 to 10 mph W | 5% |
| Wednesday Night | 41°F | Partly Cloudy | 3 mph SW | 0% |
| Thursday | 68°F | Sunny | 3 to 8 mph SW | 0% |
| Thursday Night | 42°F | Mostly Cloudy | 3 mph W | 6% |
| Friday | 60°F | Partly Sunny | 3 to 12 mph NW | 2% |
| Friday Night | 37°F | Mostly Cloudy | 5 mph N | 0% |
| Saturday | 57°F | Partly Sunny | 5 mph NW | 0% |
| Saturday Night | 33°F | Partly Cloudy | 1 mph NW | 1% |
| Sunday | 63°F | Sunny | 1 to 6 mph W | 4% |
| Sunday Night | 33°F | Mostly Clear | 2 mph W | 5% |
| Monday | 66°F | Sunny | 1 to 7 mph W | 2% |
| Monday Night | 37°F | Mostly Clear | 3 mph SW | 0% |
| Tuesday | 69°F | Sunny | 2 to 6 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Percy, IL
Last spring frost
Apr 12
First fall frost
Oct 22
Growing season
191 days
Hardiness zone
7a
Explore more for Percy, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Sparta 1 W, Il (10 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.