Sibley, IL Weather & Growing Conditions
Tonight
65°F
Partly Cloudy
Partly cloudy, with a low around 65. East southeast wind around 10 mph, with gusts as high as 20 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 65°F | Partly Cloudy | 10 mph ESE | 11% |
| Saturday | 85°F | Chance Showers And Thunderstorms | 5 to 10 mph SSE | 40% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 5 mph SW | 54% |
| Sunday | 77°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 15 mph NNE | 68% |
| Sunday Night | 57°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 65% |
| Monday | 67°F | Showers And Thunderstorms Likely | 15 mph ENE | 68% |
| Monday Night | 52°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 45% |
| Tuesday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 25% |
| Tuesday Night | 51°F | Mostly Cloudy | 5 to 15 mph NNE | 9% |
| Wednesday | 68°F | Partly Sunny | 5 to 10 mph NNE | 5% |
| Wednesday Night | 52°F | Partly Cloudy | 5 to 10 mph NNE | 5% |
| Thursday | 70°F | Mostly Sunny | 5 to 10 mph NNE | 3% |
| Thursday Night | 53°F | Partly Cloudy | 5 mph NNE | 4% |
| Friday | 72°F | Mostly Sunny | 5 to 10 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sibley, IL
Last spring frost
Apr 21
First fall frost
Oct 17
Growing season
178 days
Hardiness zone
6a
Explore more for Sibley, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Gibson City, Il (6.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.