Forest Park, IL Weather & Growing Conditions
This Afternoon
73°F
Chance Rain
A chance of rain. Mostly cloudy. High near 73, with temperatures falling to around 70 in the afternoon. South wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 40%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Chance Rain | 15 to 20 mph S | 35% |
| Tonight | 61°F | Rain | 15 mph S | 79% |
| Wednesday | 64°F | Rain Likely | 15 mph SSW | 58% |
| Wednesday Night | 50°F | Mostly Cloudy | 15 mph SW | 13% |
| Thursday | 58°F | Chance Rain | 10 to 15 mph WSW | 27% |
| Thursday Night | 45°F | Chance Rain | 5 to 10 mph WNW | 50% |
| Friday | 53°F | Chance Rain | 10 to 15 mph N | 36% |
| Friday Night | 40°F | Mostly Cloudy | 5 to 10 mph NNW | 14% |
| Saturday | 52°F | Mostly Sunny | 5 mph WNW | 11% |
| Saturday Night | 38°F | Partly Cloudy | 5 mph WSW | 7% |
| Sunday | 57°F | Mostly Sunny then Slight Chance Rain | 5 to 10 mph W | 15% |
| Sunday Night | 40°F | Mostly Clear | 5 to 10 mph WNW | 10% |
| Monday | 60°F | Sunny | 5 to 10 mph WSW | 5% |
| Monday Night | 44°F | Mostly Clear | 5 to 10 mph W | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Forest Park, IL
Last spring frost
Apr 11
First fall frost
Oct 31
Growing season
201 days
Hardiness zone
6a
Explore more for Forest Park, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Chicago Midway Ap, Il (6.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.