Waukegan, IL Weather & Growing Conditions
Overnight
59°F
Rain Showers
Rain showers. Cloudy. Low around 59, with temperatures rising to around 63 overnight. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 59°F | Rain Showers | 15 mph S | 80% |
| Wednesday | 64°F | Scattered Rain Showers then Patchy Drizzle | 15 mph SSW | 44% |
| Wednesday Night | 47°F | Patchy Drizzle then Mostly Cloudy | 15 mph SW | 13% |
| Thursday | 55°F | Chance Rain Showers | 15 mph WSW | 35% |
| Thursday Night | 39°F | Rain Showers Likely | 15 mph NW | 63% |
| Friday | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 15 to 20 mph NNW | 19% |
| Friday Night | 35°F | Partly Cloudy | 10 to 15 mph NNW | 4% |
| Saturday | 51°F | Mostly Sunny | 5 mph NW | 1% |
| Saturday Night | 38°F | Partly Cloudy | 5 to 10 mph W | 0% |
| Sunday | 53°F | Sunny | 10 mph W | 6% |
| Sunday Night | 39°F | Mostly Clear | 5 to 10 mph W | 1% |
| Monday | 57°F | Mostly Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 44°F | Partly Cloudy | 5 to 10 mph WSW | 1% |
| Tuesday | 57°F | Sunny | 5 mph WNW | 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.