Waukegan, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Waukegan, a city in Lake County, Illinois.
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. South wind around 10 mph, with gusts as high as 20 mph.
7-day forecast for Waukegan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 10 mph S | 0% |
| Tonight | 68°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 to 10 mph SW | 45% |
| Wednesday | 78°F | Showers And Thunderstorms Likely | 5 mph SSW | 74% |
| Wednesday Night | 63°F | Showers And Thunderstorms | 0 to 5 mph WNW | 81% |
| Thursday | 76°F | Chance Rain Showers | 0 to 5 mph NNE | 54% |
| Thursday Night | 62°F | Partly Cloudy | 0 to 5 mph SSW | 13% |
| Friday | 80°F | Mostly Sunny | 0 to 5 mph SW | 3% |
| Friday Night | 64°F | Mostly Clear | 0 to 5 mph S | 8% |
| Saturday | 84°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph SSW | 15% |
| Saturday Night | 69°F | Slight Chance Showers And Thunderstorms | 5 mph SW | 22% |
| Sunday | 85°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 22% |
| Sunday Night | 68°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph WSW | 47% |
| Monday | 84°F | Chance Showers And Thunderstorms | 5 mph SSW | 47% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 5 mph WNW | 49% |
Forecast source: National Weather Service (api.weather.gov) for Waukegan (42.369, -87.871). Updated through the day.
Growing snapshot for Waukegan
Last spring frost
Apr 30
First fall frost
Oct 19
Growing season
170 days
Hardiness zone
6a
More local growing data for Waukegan: nearby ZIP 60085 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Antioch
Bannockburn
Beach Park
Buffalo Grove
Burtons Bridge
Deer Park
Deerfield
Forest Lake
Fox Lake
Fox Lake Hills
Gages Lake
Grandwood Park
Grayslake
Green Oaks
Gurnee
Hainesville
Hawthorn Woods
Highland Park
Highwood
Holiday Hills
Indian Creek
Island Lake
Kildeer
Knollwood
Lake Bluff
Lake Forest
Lake Villa
Lake Zurich
Libertyville
Lincolnshire
Climate data from the nearest NOAA station, Waukegan, Il (1.2 mi from Waukegan). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.