Downers Grove, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Downers Grove, a village in Dupage County, Illinois.
This Afternoon
72°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. High near 72, with temperatures falling to around 70 in the afternoon. East wind 10 to 15 mph. Chance of precipitation is 50%.
7-day forecast for Downers Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Chance Rain Showers | 10 to 15 mph E | 49% |
| Tonight | 62°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 10 mph E | 46% |
| Saturday | 77°F | Showers And Thunderstorms Likely | 10 mph SE | 82% |
| Saturday Night | 65°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph NNE | 82% |
| Sunday | 68°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 | 53°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 | 53°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 15 mph NE | 16% |
| 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 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Downers Grove (41.795, -88.021). Updated through the day.
Growing snapshot for Downers Grove
Last spring frost
Apr 28
First fall frost
Oct 16
Growing season
169 days
Hardiness zone
6a
More local growing data for Downers Grove: nearby ZIP 60515 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Addison
Bartlett
Bensenville
Bloomingdale
Burr Ridge
Carol Stream
Clarendon Hills
Darien
Elmhurst
Glen Ellyn
Glendale Heights
Hanover Park
Hinsdale
Itasca
Lisle
Lombard
Naperville
Oak Brook
Oakbrook Terrace
Roselle
Villa Park
Warrenville
Wayne
West Chicago
Westmont
Wheaton
Willowbrook
Winfield
Wood Dale
Woodridge
Climate data from the nearest NOAA station, Lisle-Morton Arboretum, Il (2.5 mi from Downers Grove). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.