Waukegan, IL Weather & Growing Conditions
This Afternoon
63°F
Slight Chance Rain Showers
A slight chance of drizzle before 2pm, then a slight chance of rain showers and a slight chance of drizzle. Mostly cloudy. High near 63, with temperatures falling to around 55 in the afternoon. Southwest wind around 15 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 63°F | Slight Chance Rain Showers | 15 mph SW | 6% |
| Tonight | 46°F | Slight Chance Rain Showers then Cloudy | 15 mph SW | 11% |
| Thursday | 53°F | Rain Likely | 10 to 15 mph W | 69% |
| Thursday Night | 37°F | Chance Rain then Cloudy | 15 mph NNW | 52% |
| Friday | 49°F | Partly Sunny | 15 mph NNW | 7% |
| Friday Night | 35°F | Partly Cloudy | 5 to 10 mph NNW | 1% |
| Saturday | 51°F | Sunny | 5 mph NW | 0% |
| Saturday Night | 37°F | Mostly Clear | 5 to 10 mph W | 0% |
| Sunday | 55°F | Sunny | 10 mph W | 1% |
| Sunday Night | 39°F | Mostly Clear | 5 mph W | 0% |
| Monday | 58°F | Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 43°F | Mostly Clear | 5 to 10 mph WSW | 0% |
| Tuesday | 57°F | Sunny | 5 mph WNW | 1% |
| Tuesday Night | 42°F | Partly Cloudy | 5 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Waukegan, IL
Last spring frost
Apr 30
First fall frost
Oct 19
Growing season
170 days
Hardiness zone
6a
Explore more for Waukegan, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Waukegan, Il (1.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.