Tennessee, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Tennessee, a village in Mcdonough County, Illinois.
This Afternoon
55°F
Cloudy
Cloudy. High near 55, with temperatures falling to around 53 in the afternoon. West wind around 15 mph, with gusts as high as 25 mph.
7-day forecast for Tennessee
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 55°F | Cloudy | 15 mph W | 8% |
| Tonight | 46°F | Mostly Cloudy | 10 mph SW | 9% |
| Thursday | 54°F | Chance Rain Showers | 10 to 15 mph W | 28% |
| Thursday Night | 41°F | Slight Chance Rain Showers then Cloudy | 5 to 10 mph N | 19% |
| Friday | 49°F | Mostly Sunny | 5 to 10 mph N | 3% |
| Friday Night | 30°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 0 mph | 0% |
| Sunday | 58°F | Sunny | 0 to 5 mph W | 0% |
| Sunday Night | 35°F | Mostly Clear | 0 to 5 mph W | 0% |
| Monday | 64°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 40°F | Clear | 0 to 5 mph SW | 0% |
| Tuesday | 63°F | Sunny | 0 to 5 mph NW | 2% |
| Tuesday Night | 40°F | Mostly Clear | 0 mph | 2% |
Forecast source: National Weather Service (api.weather.gov) for Tennessee (40.411, -90.836). Updated through the day.
Growing snapshot for Tennessee
Last spring frost
Apr 21
First fall frost
Oct 19
Growing season
180 days
Hardiness zone
6a
More local growing data for Tennessee: nearby ZIP 62326 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Adair
Bardolph
Blandinsville
Bushnell
Colchester
Georgetown
Good Hope
Industry
Macomb
Prairie City
Sciota
Climate data from the nearest NOAA station, La Harpe, Il (13.8 mi from Tennessee). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.