Summit, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Summit, a village in Cook County, Illinois.
This Afternoon
72°F
Slight Chance Rain Showers
A slight chance of rain showers. Mostly cloudy, with a high near 72. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
7-day forecast for Summit
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Slight Chance Rain Showers | 10 mph E | 21% |
| Tonight | 63°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 10 mph E | 46% |
| Saturday | 77°F | Showers And Thunderstorms Likely | 5 to 10 mph SE | 85% |
| Saturday Night | 65°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph NE | 81% |
| Sunday | 69°F | Showers And Thunderstorms | 10 to 15 mph NNE | 81% |
| Sunday Night | 58°F | Rain Showers Likely | 15 mph NE | 61% |
| Monday | 65°F | Chance Rain Showers | 15 mph ENE | 54% |
| Monday Night | 55°F | Chance Rain Showers | 10 to 15 mph ENE | 33% |
| Tuesday | 63°F | Slight Chance Rain Showers | 10 to 15 mph NE | 24% |
| Tuesday Night | 55°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 15 mph NE | 18% |
| Wednesday | 65°F | Partly Sunny | 5 to 10 mph NNE | 10% |
| Wednesday Night | 55°F | Mostly Cloudy | 5 to 10 mph NNE | 4% |
| Thursday | 68°F | Partly Sunny | 5 to 10 mph NNE | 7% |
| Thursday Night | 56°F | Mostly Cloudy | 5 to 10 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Summit (41.788, -87.814). Updated through the day.
Growing snapshot for Summit
Last spring frost
Apr 11
First fall frost
Oct 31
Growing season
201 days
Hardiness zone
6a
More local growing data for Summit: nearby ZIP 60501 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Alsip
Arbury Hills
Arlington Heights
Barrington
Barrington Hills
Bedford Park
Bellwood
Berkeley
Berwyn
Blue Island
Bridgeview
Broadview
Brookfield
Burbank
Burnham
Calumet City
Calumet Park
Chicago
Chicago Heights
Chicago Ridge
Cicero
Country Club Hills
Countryside
Crestwood
Crete
Des Plaines
Dixmoor
Dolton
East Hazel Crest
Elk Grove Village
Climate data from the nearest NOAA station, Chicago Midway Ap, Il (3.7 mi from Summit). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.