See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
19°
Drizzle
Feels Like: 19°
Min: 18°
Max: 25°
The next few hours will be overcast, with today reaching 25°C and dropping to 17°C. The coming days will be mostly cloudy throughout the day.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:37
Sunrise
18:53
Sunset
Moon
Waxing Crescent
11:34
Moonrise
20:22
Moonset
Daily Forecast
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Wednesday
Thursday
Friday
Saturday
Sunday
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Thursday
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Weather in Waukegan today, September 15, 2026
Expect a muted, overcast feel in Waukegan on September 15, 2026 as cloud persists. Brighter breaks, if they arrive, should stay brief. The first half of the day looks overcast, as cloud amounts reach about 100% around 06:00. Brighter weather, if it comes, waits until later.
Temperatures climb from an overnight low near 18°C toward a daytime high of about 25°C. Relative humidity sits between 64% and 96%, reaching its peak around 21:00. Expect gentle winds, highest near 14:00 at 4.6 km/h.
Afternoon skies stay clogged, peaking close to 100% near 12:00. The grey theme continues rather than clearing out. Visibility holds near 14.2 km, though it can fall to 7.6 km. Sunrise is at 06:37 and sunset at 18:53, giving 12 hours 16 minutes of sunlight today.
Overall, Waukegan on September 15, 2026 stays grey and muted, so outdoor plans may want a flexible backup even with a high near 25°C.
Frequently asked questions about weather in Waukegan
How warm does it get in Waukegan?
The warmest month in Waukegan is August, with average high temperatures of 24°C. The average temperature during this period is around 22°C.
How cold does it get in Waukegan?
The coldest month in Waukegan is January, with average low temperatures of -4°C. The average temperature during this period is around -2°C.
What is the wettest time of year in Waukegan?
The wettest month in Waukegan is October, with an average of 127mm of precipitation.
What is the driest time of year in Waukegan?
The driest month in Waukegan is February, with an average of 68mm of precipitation.
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