Clarendon Hills, IL Weather & Growing Conditions
Tonight
62°F
Slight Chance Rain Showers then Chance Showers And Thunderstorms
A slight chance of rain showers before 1am, then a chance of showers and thunderstorms. Mostly cloudy. Low around 62, with temperatures rising to around 64 overnight. East southeast wind 5 to 15 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 62°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 15 mph ESE | 46% |
| Saturday | 77°F | Showers And Thunderstorms Likely | 10 to 15 mph SE | 83% |
| Saturday Night | 65°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph NNE | 82% |
| Sunday | 69°F | Showers And Thunderstorms | 10 to 15 mph NNE | 82% |
| Sunday Night | 57°F | Rain Showers Likely | 15 mph NE | 62% |
| Monday | 64°F | Chance Rain Showers | 15 mph ENE | 52% |
| Monday Night | 54°F | Chance Rain Showers | 10 to 15 mph ENE | 32% |
| Tuesday | 63°F | Slight Chance Rain Showers | 10 to 15 mph NE | 24% |
| Tuesday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 17% |
| Wednesday | 65°F | Partly Sunny | 10 mph NE | 9% |
| Wednesday Night | 54°F | Mostly Cloudy | 5 to 10 mph NNE | 4% |
| Thursday | 68°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 | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Clarendon Hills, IL
Last spring frost
Apr 28
First fall frost
Oct 16
Growing season
169 days
Hardiness zone
6a
Explore more for Clarendon Hills, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Lisle-Morton Arboretum, Il (5.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.