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Park Forest, IL Weather & Growing Conditions

Today
79°F
Showers And Thunderstorms
Showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Cloudy. High near 79, with temperatures falling to around 76 in the afternoon. South southeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Today 79°F Showers And Thunderstorms 5 to 10 mph SSE 79%
Tonight 65°F Showers And Thunderstorms Likely then Showers And Thunderstorms 5 mph S 92%
Sunday 71°F Showers And Thunderstorms Likely 5 to 15 mph NNE 64%
Sunday Night 56°F Chance Showers And Thunderstorms 15 mph NE 40%
Monday 66°F Chance Rain Showers 15 mph NE 41%
Monday Night 53°F Chance Rain Showers then Mostly Cloudy 10 to 15 mph NE 30%
Tuesday 64°F Slight Chance Rain Showers 10 to 15 mph NE 17%
Tuesday Night 53°F Mostly Cloudy 10 to 15 mph NE 12%
Wednesday 66°F Partly Sunny 10 mph NE 11%
Wednesday Night 54°F Mostly Cloudy 5 to 10 mph NNE 5%
Thursday 68°F Partly Sunny 5 to 10 mph NNE 3%
Thursday Night 54°F Mostly Cloudy 5 to 10 mph NNE 3%
Friday 71°F Mostly Sunny 5 to 10 mph NNE 3%
Friday Night 54°F Partly Cloudy 0 to 10 mph NE 3%

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

Growing snapshot for Park Forest, IL

Last spring frost
Apr 23
First fall frost
Oct 20
Growing season
179 days
Hardiness zone
6a

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

Climate data from the nearest NOAA station, Park Forest, Il (1.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.