Park Forest, IL Weather & Growing Conditions
This Afternoon
72°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Cloudy. High near 72, with temperatures falling to around 70 in the afternoon. South wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Chance Showers And Thunderstorms | 5 mph S | 31% |
| Tonight | 66°F | Showers And Thunderstorms | 5 mph SSE | 91% |
| Sunday | 69°F | Showers And Thunderstorms | 5 to 15 mph NNE | 84% |
| Sunday Night | 56°F | Chance Rain Showers | 10 to 15 mph NE | 49% |
| Monday | 65°F | Chance Rain Showers | 15 mph ENE | 43% |
| Monday Night | 54°F | Chance Rain Showers | 10 to 15 mph ENE | 33% |
| Tuesday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Tuesday Night | 54°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 29% |
| Wednesday | 65°F | Partly Sunny | 10 mph NE | 14% |
| Wednesday Night | 54°F | Mostly Cloudy | 5 to 10 mph NE | 7% |
| Thursday | 68°F | Partly Sunny | 5 to 10 mph NE | 2% |
| Thursday Night | 55°F | Mostly Cloudy | 0 to 5 mph NE | 7% |
| Friday | 72°F | Partly Sunny | 0 to 10 mph NE | 7% |
| Friday Night | 55°F | Partly Cloudy | 0 to 5 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 20, 2026.