Oak Forest, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oak Forest, a city in Cook County, Illinois.
Tonight
63°F
Slight Chance Rain Showers then Chance Showers And Thunderstorms
A slight chance of rain showers before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 63. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Oak Forest
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 63°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 10 mph E | 41% |
| Saturday | 78°F | Showers And Thunderstorms Likely | 5 to 10 mph SE | 83% |
| Saturday Night | 66°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 mph NNW | 82% |
| Sunday | 70°F | Showers And Thunderstorms | 10 to 15 mph NNE | 82% |
| Sunday Night | 57°F | Rain Showers Likely | 15 mph NE | 65% |
| Monday | 65°F | Rain Showers Likely | 15 mph ENE | 57% |
| Monday Night | 53°F | Chance Rain Showers | 10 to 15 mph ENE | 34% |
| Tuesday | 64°F | Slight Chance Rain Showers | 10 to 15 mph NE | 22% |
| Tuesday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 15 mph NE | 16% |
| Wednesday | 66°F | Partly Sunny | 5 to 10 mph NNE | 10% |
| Wednesday Night | 54°F | Mostly Cloudy | 5 to 10 mph NNE | 4% |
| Thursday | 69°F | Partly Sunny | 5 to 10 mph NNE | 6% |
| Thursday Night | 55°F | Mostly Cloudy | 5 to 10 mph NNE | 3% |
| Friday | 70°F | Mostly Sunny | 5 to 10 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Oak Forest (41.607, -87.753). Updated through the day.
Growing snapshot for Oak Forest
Last spring frost
Apr 23
First fall frost
Oct 20
Growing season
179 days
Hardiness zone
6a
More local growing data for Oak Forest: nearby ZIP 60452 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Park Forest, Il (8.8 mi from Oak Forest). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.