McLeansboro, IL Weather & Growing Conditions
Today
87°F
Sunny
Sunny, with a high near 87. East northeast wind 0 to 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 0 to 3 mph ENE | 0% |
| Tonight | 63°F | Mostly Clear | 2 mph NE | 0% |
| Wednesday | 90°F | Sunny | 2 mph S | 0% |
| Wednesday Night | 68°F | Partly Cloudy | 2 mph S | 5% |
| Thursday | 89°F | Chance Showers And Thunderstorms | 1 to 6 mph SSW | 25% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms | 1 to 5 mph S | 56% |
| Friday | 89°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 1 to 5 mph SW | 56% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 0 to 3 mph SSW | 42% |
| Saturday | 90°F | Chance Showers And Thunderstorms | 1 to 5 mph SSW | 42% |
| Saturday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph S | 17% |
| Sunday | 92°F | Mostly Sunny | 2 to 8 mph SSW | 7% |
| Sunday Night | 72°F | Mostly Clear | 3 to 8 mph SSW | 5% |
| Monday | 93°F | Sunny | 5 to 9 mph SSW | 5% |
| Monday Night | 74°F | Partly Cloudy | 7 mph SSW | 10% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for McLeansboro, IL
Last spring frost
Apr 11
First fall frost
Oct 21
Growing season
190 days
Hardiness zone
6b
Explore more for McLeansboro, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Mcleansboro, Il (1.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.