Shannon, IL Weather & Growing Conditions
Overnight
53°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. Low around 53, with temperatures rising to around 56 overnight. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Chance Rain Showers | 15 mph S | 32% |
| Wednesday | 58°F | Chance Rain Showers | 15 to 20 mph SW | 46% |
| Wednesday Night | 45°F | Chance Rain Showers | 15 to 20 mph SW | 27% |
| Thursday | 54°F | Rain Showers Likely | 10 to 15 mph W | 58% |
| Thursday Night | 38°F | Mostly Cloudy | 10 mph N | 14% |
| Friday | 49°F | Partly Sunny | 5 to 15 mph N | 3% |
| Friday Night | 30°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 4% |
| Sunday Night | 33°F | Mostly Clear | 0 to 5 mph W | 0% |
| Monday | 61°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 62°F | Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Shannon, IL
Last spring frost
Apr 26
First fall frost
Oct 13
Growing season
169 days
Hardiness zone
5a
Explore more for Shannon, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Freeport Waste Wtp, Il (11.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.