Harman US

LaPlace, IL Weather & Growing Conditions

Today
90°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 10am and 1pm. Partly sunny, with a high near 90. South southwest wind around 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Today 90°F Slight Chance Showers And Thunderstorms 8 mph SSW 20%
Tonight 69°F Mostly Cloudy then Slight Chance Showers And Thunderstorms 7 mph SSW 16%
Sunday 83°F Chance Showers And Thunderstorms 3 to 12 mph NNW 47%
Sunday Night 59°F Chance Showers And Thunderstorms 15 mph NE 61%
Monday 69°F Showers And Thunderstorms Likely 16 mph NE 70%
Monday Night 53°F Chance Rain Showers 15 mph NE 47%
Tuesday 66°F Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms 16 mph NE 23%
Tuesday Night 51°F Slight Chance Showers And Thunderstorms then Mostly Cloudy 8 to 15 mph NNE 23%
Wednesday 69°F Mostly Sunny 13 mph NNE 4%
Wednesday Night 52°F Partly Cloudy 6 to 12 mph NNE 3%
Thursday 71°F Mostly Sunny 7 to 10 mph NNE 3%
Thursday Night 54°F Partly Cloudy 5 to 10 mph NNE 3%
Friday 74°F Mostly Sunny 6 to 10 mph NE 1%
Friday Night 53°F Partly Cloudy 6 to 9 mph NE 1%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for LaPlace, IL

Last spring frost
Apr 16
First fall frost
Oct 22
Growing season
187 days
Hardiness zone
6a

Explore more for LaPlace, IL: full frost dates · planting calendar · Illinois frost dates

Climate data from the nearest NOAA station, Decatur Ap, Il (7.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.