Sterling, IL Weather & Growing Conditions
This Afternoon
68°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. High near 68, with temperatures falling to around 66 in the afternoon. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Showers And Thunderstorms | 15 mph S | 96% |
| Tonight | 52°F | Showers And Thunderstorms | 15 mph S | 82% |
| Wednesday | 57°F | Chance Rain Showers | 15 mph SW | 38% |
| Wednesday Night | 44°F | Chance Rain Showers | 10 to 15 mph SW | 25% |
| Thursday | 54°F | Chance Rain Showers | 10 to 15 mph W | 52% |
| Thursday Night | 40°F | Chance Rain Showers | 5 to 10 mph NW | 26% |
| Friday | 52°F | Partly Sunny | 5 to 10 mph N | 14% |
| Friday Night | 32°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph W | 3% |
| Saturday Night | 32°F | Partly Cloudy | 0 to 5 mph W | 4% |
| Sunday | 58°F | Mostly Sunny | 5 to 10 mph W | 12% |
| Sunday Night | 33°F | Mostly Clear | 0 to 5 mph W | 4% |
| Monday | 62°F | Sunny | 5 to 15 mph SW | 2% |
| Monday Night | 38°F | Mostly Clear | 5 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sterling, IL
Last spring frost
Apr 21
First fall frost
Oct 19
Growing season
180 days
Hardiness zone
5b
Explore more for Sterling, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Dixon 1W, Il (11.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.