NWS, American, European side by side around Waukegan and nearby towns.Live rain radar →
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Next 14 hours
consensus of the three models
7-day forecast
where the models agree, and where they split
Waukegan, IL is at its warmest in Jul (average highs near 79°F) and coldest in Jan (lows around 22°F), with roughly 37 in of precipitation across the year. Below, compare what NWS, American, European forecast for Waukegan right now, and see exactly where they disagree.
Waukegan climate by month
average daytime high and overnight low across a typical year
Jan
33°
22°
Feb
42°
26°
Mar
45°
31°
Apr
57°
41°
May
67°
50°
Jun
77°
60°
Jul
79°
65°
Aug
79°
65°
Sep
74°
61°
Oct
63°
49°
Nov
49°
37°
Dec
39°
29°
Common questions
What's the weather in Waukegan today?
On this page we show what NWS, American, European each forecast for Waukegan today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Waukegan today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Waukegan and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Waukegan?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the Waukegan forecast is reliable, and when they split you should expect surprises. See our tested US accuracy scoreboard for how the models compare.
What is the warmest month in Waukegan?
Jul is typically the warmest month in Waukegan, with average highs around 79°F.
How cold does Waukegan get?
The coldest month in Waukegan is Jan, when overnight lows average about 22°F.
How much rain does Waukegan get?
Waukegan sees roughly 37 in of precipitation a year, with Jul usually the wettest month.
The forecasts Americans check
The two biggest apps keep their model a secret, so we can't show their numbers, only link you to them. The National Weather Service is public, so its data sits right in the comparison above.