Lebanon, IL Weather & Growing Conditions
This Afternoon
73°F
Rain
Rain and a slight chance of thunderstorms. Cloudy. High near 73, with temperatures falling to around 69 in the afternoon. South wind around 21 mph. Chance of precipitation is 90%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Rain | 21 mph S | 91% |
| Tonight | 54°F | Rain | 8 to 18 mph S | 99% |
| Wednesday | 65°F | Chance Rain Showers then Mostly Cloudy | 7 to 14 mph W | 12% |
| Wednesday Night | 43°F | Partly Cloudy | 5 mph SW | 0% |
| Thursday | 67°F | Sunny | 5 to 12 mph W | 1% |
| Thursday Night | 44°F | Mostly Cloudy | 5 mph NW | 6% |
| Friday | 59°F | Mostly Cloudy | 5 to 12 mph NW | 7% |
| Friday Night | 39°F | Partly Cloudy | 1 to 7 mph N | 1% |
| Saturday | 56°F | Partly Sunny | 1 to 5 mph NW | 0% |
| Saturday Night | 36°F | Partly Cloudy | 1 mph NW | 0% |
| Sunday | 62°F | Sunny | 1 to 7 mph W | 7% |
| Sunday Night | 36°F | Mostly Clear | 3 mph NW | 5% |
| Monday | 67°F | Sunny | 1 to 9 mph W | 2% |
| Monday Night | 40°F | Mostly Clear | 3 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lebanon, IL
Last spring frost
Apr 12
First fall frost
Oct 20
Growing season
189 days
Hardiness zone
6b
Explore more for Lebanon, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Belleville Siu Rsch, Il (6.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.