Shannon, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Shannon, a village in Carroll County, Illinois.
Overnight
61°F
Mostly Clear
Mostly clear. Low around 61, with temperatures rising to around 63 overnight. South wind around 5 mph.
7-day forecast for Shannon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 84°F | Mostly Sunny | 5 to 10 mph SW | 14% |
| Tuesday Night | 65°F | Showers And Thunderstorms Likely | 5 mph W | 76% |
| Wednesday | 75°F | Showers And Thunderstorms Likely | 5 mph W | 74% |
| Wednesday Night | 60°F | Showers And Thunderstorms Likely | 0 to 5 mph N | 68% |
| Thursday | 77°F | Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 31% |
| Thursday Night | 59°F | Mostly Clear | 0 mph | 7% |
| Friday | 80°F | Mostly Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 63°F | Mostly Clear | 0 to 5 mph S | 7% |
| Saturday | 83°F | Mostly Sunny | 5 to 10 mph SW | 11% |
| Saturday Night | 69°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 22% |
| Sunday | 84°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph SW | 22% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 41% |
| Monday | 83°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 38% |
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 Aug 4, 2026.