Shannon, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Shannon, a village in Carroll County, Illinois.
This Afternoon
67°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy, with a high near 67. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.
7-day forecast for Shannon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Showers And Thunderstorms | 15 mph S | 97% |
| Tonight | 53°F | Showers And Thunderstorms | 15 mph S | 90% |
| Wednesday | 57°F | Chance Rain Showers | 15 mph SW | 53% |
| Wednesday Night | 44°F | Chance Rain Showers | 15 mph SW | 28% |
| Thursday | 53°F | Rain Showers Likely | 10 to 15 mph W | 55% |
| Thursday Night | 40°F | Chance Rain Showers then Mostly Cloudy | 10 mph NW | 28% |
| Friday | 50°F | Partly Sunny | 10 to 15 mph N | 13% |
| Friday Night | 32°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph W | 2% |
| Saturday Night | 33°F | Partly Cloudy | 0 to 5 mph W | 4% |
| Sunday | 58°F | Mostly Sunny | 5 to 10 mph W | 13% |
| Sunday Night | 34°F | Mostly Clear | 5 mph W | 3% |
| Monday | 60°F | Sunny | 5 to 15 mph SW | 1% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Shannon (42.152, -89.740). Updated through the day.
Growing snapshot for Shannon
Last spring frost
Apr 26
First fall frost
Oct 13
Growing season
169 days
Hardiness zone
5a
More local growing data for Shannon: nearby ZIP 61078 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Freeport Waste Wtp, Il (11.1 mi from Shannon). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.