Westmont, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Westmont, a village in Dupage County, Illinois.
Overnight
60°F
Rain Showers
Rain showers. Cloudy. Low around 60, with temperatures rising to around 63 overnight. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Westmont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 60°F | Rain Showers | 15 mph S | 84% |
| Wednesday | 64°F | Chance Rain Showers then Mostly Cloudy | 15 mph SW | 34% |
| Wednesday Night | 49°F | Mostly Cloudy | 15 mph SW | 12% |
| Thursday | 57°F | Mostly Cloudy then Chance Rain Showers | 10 to 15 mph WSW | 43% |
| Thursday Night | 43°F | Chance Rain Showers | 10 to 15 mph NW | 52% |
| Friday | 50°F | Mostly Cloudy | 15 mph NNW | 13% |
| Friday Night | 37°F | Partly Cloudy | 5 to 10 mph NNW | 2% |
| Saturday | 51°F | Mostly Sunny | 5 mph NW | 1% |
| Saturday Night | 36°F | Mostly Clear | 5 mph W | 0% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 38°F | Mostly Clear | 5 to 10 mph W | 1% |
| Monday | 60°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 42°F | Mostly Clear | 5 to 10 mph WSW | 1% |
| Tuesday | 62°F | Sunny | 5 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Westmont (41.794, -87.973). Updated through the day.
Growing snapshot for Westmont
Last spring frost
Apr 28
First fall frost
Oct 16
Growing season
169 days
Hardiness zone
6a
More local growing data for Westmont: nearby ZIP 60559 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Addison
Bartlett
Bensenville
Bloomingdale
Burr Ridge
Carol Stream
Clarendon Hills
Darien
Downers Grove
Elmhurst
Glen Ellyn
Glendale Heights
Hanover Park
Hinsdale
Itasca
Lisle
Lombard
Naperville
Oak Brook
Oakbrook Terrace
Roselle
Villa Park
Warrenville
Wayne
West Chicago
Wheaton
Willowbrook
Winfield
Wood Dale
Woodridge
Climate data from the nearest NOAA station, Lisle-Morton Arboretum, Il (5.3 mi from Westmont). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.