McLean, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McLean, a village in Mclean County, Illinois.
This Afternoon
71°F
Light Rain Likely
Rain likely and a slight chance of thunderstorms. Mostly cloudy, with a high near 71. South wind around 22 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for McLean
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Light Rain Likely | 22 mph S | 74% |
| Tonight | 54°F | Rain | 15 to 20 mph S | 78% |
| Wednesday | 60°F | Chance Light Rain then Mostly Cloudy | 14 to 17 mph SW | 26% |
| Wednesday Night | 45°F | Mostly Cloudy | 13 mph SW | 2% |
| Thursday | 60°F | Mostly Sunny | 12 to 15 mph WSW | 7% |
| Thursday Night | 42°F | Mostly Cloudy then Slight Chance Light Rain | 6 to 9 mph NW | 23% |
| Friday | 55°F | Slight Chance Light Rain then Mostly Cloudy | 8 to 12 mph NNW | 17% |
| Friday Night | 35°F | Partly Cloudy | 3 to 10 mph N | 7% |
| Saturday | 53°F | Mostly Sunny | 6 mph NW | 2% |
| Saturday Night | 33°F | Partly Cloudy | 3 mph WSW | 3% |
| Sunday | 60°F | Sunny | 3 to 10 mph WNW | 12% |
| Sunday Night | 34°F | Mostly Clear | 5 to 8 mph WNW | 6% |
| Monday | 64°F | Sunny | 5 to 13 mph SW | 2% |
| Monday Night | 39°F | Mostly Clear | 5 to 9 mph WSW | 2% |
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 Nov 4, 2026.