Sterling, IL Weather & Growing Conditions
Overnight
63°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 1am. Mostly cloudy. Low around 63, with temperatures rising to around 66 overnight. Southeast wind around 10 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Chance Showers And Thunderstorms | 10 mph SE | 52% |
| Saturday | 81°F | Showers And Thunderstorms | 5 to 10 mph SE | 81% |
| Saturday Night | 62°F | Showers And Thunderstorms | 5 to 10 mph NW | 78% |
| Sunday | 70°F | Rain Showers | 10 to 15 mph NE | 78% |
| Sunday Night | 54°F | Rain Showers Likely | 15 mph NE | 61% |
| Monday | 66°F | Chance Rain Showers | 15 mph NE | 53% |
| Monday Night | 50°F | Chance Rain Showers | 10 to 15 mph NE | 40% |
| Tuesday | 63°F | Chance Rain Showers | 15 mph NE | 29% |
| Tuesday Night | 48°F | Partly Cloudy | 5 to 15 mph NE | 6% |
| Wednesday | 68°F | Mostly Sunny | 5 to 10 mph NE | 3% |
| Wednesday Night | 50°F | Partly Cloudy | 0 to 10 mph NE | 3% |
| Thursday | 69°F | Mostly Sunny | 5 mph NE | 4% |
| Thursday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 5% |
| Friday | 71°F | Mostly Sunny | 0 to 5 mph NE | 5% |
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 Sep 19, 2026.