McLean, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McLean, a village in Mclean County, Illinois.
Overnight
69°F
Partly Cloudy
Partly cloudy, with a low around 69. South southeast wind around 8 mph, with gusts as high as 16 mph.
7-day forecast for McLean
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 69°F | Partly Cloudy | 8 mph SSE | 6% |
| Saturday | 87°F | Chance Showers And Thunderstorms | 8 mph SSE | 27% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 7 mph SSW | 41% |
| Sunday | 77°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 15 mph N | 70% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 14 to 17 mph NE | 66% |
| Monday | 66°F | Showers And Thunderstorms Likely | 18 mph ENE | 65% |
| Monday Night | 53°F | Chance Rain Showers | 14 to 18 mph NE | 47% |
| Tuesday | 65°F | Slight Chance Rain Showers | 16 mph NE | 23% |
| Tuesday Night | 51°F | Slight Chance Rain Showers then Partly Cloudy | 8 to 16 mph NNE | 15% |
| Wednesday | 68°F | Mostly Sunny | 13 mph NNE | 3% |
| Wednesday Night | 52°F | Partly Cloudy | 6 to 12 mph NNE | 2% |
| Thursday | 70°F | Mostly Sunny | 7 to 10 mph NNE | 3% |
| Thursday Night | 54°F | Partly Cloudy | 6 to 9 mph NE | 3% |
| Friday | 73°F | Mostly Sunny | 9 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov) for McLean (40.314, -89.169). Updated through the day.
Growing snapshot for McLean
Last spring frost
Apr 21
First fall frost
Oct 20
Growing season
181 days
Hardiness zone
6a
More local growing data for McLean: nearby ZIP 61754 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Bloomington 5W, Il (11.6 mi from McLean). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.