Glendale Heights, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Glendale Heights, a village in Dupage County, Illinois.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
7-day forecast for Glendale Heights
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 to 10 mph SSW | 2% |
| Tonight | 68°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 mph SSW | 33% |
| Wednesday | 80°F | Showers And Thunderstorms Likely | 5 mph WSW | 73% |
| Wednesday Night | 64°F | Showers And Thunderstorms | 0 to 5 mph WNW | 88% |
| Thursday | 78°F | Rain Showers Likely then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 65% |
| Thursday Night | 62°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SSE | 22% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph SSW | 4% |
| Friday Night | 65°F | Mostly Clear | 0 to 5 mph SSW | 8% |
| Saturday | 84°F | Mostly Sunny | 5 to 10 mph SW | 10% |
| Saturday Night | 69°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 19% |
| Sunday | 85°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph SW | 19% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 42% |
| Monday | 85°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 42% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 5 to 10 mph WSW | 46% |
Forecast source: National Weather Service (api.weather.gov) for Glendale Heights (41.919, -88.078). Updated through the day.
Growing snapshot for Glendale Heights
Last spring frost
Apr 28
First fall frost
Oct 16
Growing season
169 days
Hardiness zone
5b
More local growing data for Glendale Heights: nearby ZIP 60139 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
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Climate data from the nearest NOAA station, Lisle-Morton Arboretum, Il (7.3 mi from Glendale Heights). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.