Oak Lawn, IL Weather & Growing Conditions
Tonight
66°F
Showers And Thunderstorms
Rain showers before 10pm, then showers and thunderstorms between 10pm and 1am, then patchy fog and showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy. Low around 66, with temperatures rising to around 69 overnight. East wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 66°F | Showers And Thunderstorms | 5 mph E | 99% |
| Sunday | 68°F | Patchy Fog | 10 to 15 mph NNE | 86% |
| Sunday Night | 58°F | Chance Rain Showers | 15 mph ENE | 34% |
| Monday | 65°F | Chance Rain Showers | 15 mph ENE | 39% |
| Monday Night | 55°F | Chance Rain Showers | 10 to 15 mph ENE | 28% |
| Tuesday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 28% |
| Tuesday Night | 55°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 23% |
| Wednesday | 64°F | Mostly Cloudy | 10 mph NE | 14% |
| Wednesday Night | 56°F | Mostly Cloudy | 5 to 10 mph NE | 7% |
| Thursday | 66°F | Partly Sunny | 5 to 10 mph NE | 2% |
| Thursday Night | 57°F | Mostly Cloudy | 0 to 5 mph NE | 9% |
| Friday | 71°F | Partly Sunny | 0 to 10 mph NE | 9% |
| Friday Night | 58°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Saturday | 73°F | Mostly Sunny | 0 to 5 mph ENE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Oak Lawn, IL
Last spring frost
Apr 10
First fall frost
Nov 1
Growing season
203 days
Hardiness zone
6a
Explore more for Oak Lawn, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Chicago Midway Ap 3Sw, Il (2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.