🇺🇸 Weather in Waukegan
Map Overlays:
Hourly Forecast for Waukegan
21:00
23°
9%
22:00
22°
10%
23:00
22°
8%
00:00
21°
20%
01:00
21°
21%
02:00
21°
21%
03:00
21°
16%
04:00
21°
18%
05:00
21°
17%
06:00
20°
17%
07:00
20°
17%
08:00
20°
16%
09:00
20°
15%
10:00
21°
14%
11:00
21°
13%
12:00
22°
13%
13:00
22°
13%
14:00
21°
14%
15:00
21°
14%
16:00
21°
3%
17:00
21°
3%
18:00
20°
4%
19:00
20°
5%
20:00
21°
6%
14-Day Forecast for Waukegan
2026-09-09
Moderate rain
28° /
21°
2026-09-10
Overcast
22° /
20°
2026-09-11
Sunny
23° /
19°
2026-09-12
Overcast
27° /
20°
2026-09-13
Overcast
21° /
19°
2026-09-14
Light rain shower
24° /
19°
2026-09-15
Overcast
23° /
15°
Additional Forecasts for Waukegan
Air Quality
💨 US EPA Index 1 (Good)
CO (Carbon Monoxide) 215.0 μg/m³
O₃ (Ozone) 60.0 μg/m³
NO₂ (Nitrogen Dioxide) 11.6 μg/m³
SO₂ (Sulphur Dioxide) 0.7 μg/m³
PM2.5 (Fine particles) 4.0 μg/m³
PM10 (Coarse particles) 4.1 μg/m³
Historical Weather
Weather Forecasts for Other Cities in United States
Weather in Waukegan — FAQ
Answers refreshed each request based on current conditions in Waukegan.
What is the weather like right now in Waukegan?
Right now in Waukegan, United States the temperature is 24.3°C (feels like 27.1°C), with overcast. Relative humidity is 83% and wind is 7.6 km/h.
What is today's high and low temperature in Waukegan?
Today's forecast high in Waukegan is 27.7°C and the overnight low is 20.8°C. The diurnal range — high minus low — depends on cloud cover; clear days swing more than overcast ones.
Will it rain in Waukegan today?
The chance of precipitation in Waukegan today is 86%. Forecast accuracy is highest within the next 6 hours and decreases steadily out to 14 days.
How often does the weather here update?
Current observations refresh every 15-60 minutes from the nearest monitoring stations operated by national meteorological agencies. The hourly forecast updates approximately every hour; the 7- and 14-day outlook is recomputed several times per day.
What does 'feels like' temperature mean?
Feels-like (apparent) temperature accounts for humidity, wind chill and direct sunshine — variables that change how the human body perceives heat or cold. On hot, humid days it can be 3-7°C above the actual reading; on cold windy days it can be 5-15°C below.
Why does the temperature in Waukegan differ from nearby cities?
Even short distances can change temperatures noticeably. Waukegan's reading reflects altitude, proximity to large bodies of water, urban heat island effects, and the exact location of the monitoring stations supplying the data. Coastal cities are typically milder and more humid than inland equivalents.