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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

WhenTempForecastWindPrecip
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.