Waukegan Weather Year-Round — Best Time to Visit
Waukegan, United States has cool weather year-round. The best time to visit is September (score: 83/100). Annual average high: 12.4°C, total rainfall: 907mm.
When is the best time to visit Waukegan?
83
September is the best month to visit Waukegan with a travel score of 83/100 (Excellent).
Expect highs of 21.9°C, 8 rain days, and 9.8 hours of daily sunshine.
View September weather details →Travel Score by Month
39
Jan
45
Feb
51
Mar
58
Apr
68
May
80
Jun
82
Jul
82
Aug
83
Sep
68
Oct
56
Nov
43
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Waukegan each month?
12.4°C
Avg High
7°C
Avg Low
907mm
Annual Rain
How much rain does Waukegan get?
Waukegan receives 907mm of rain annually. The wettest month is typically May with 105mm, while February is the driest.
What is the weather like each month in Waukegan?
January
39
-1°C
Low: -7°C
9 rain days
Poor
February
45
0°C
Low: -7°C
7 rain days
Mixed
March
51
4°C
Low: -2°C
9 rain days
Mixed
April
58
9°C
Low: 4°C
11 rain days
Mixed
May
68
16°C
Low: 10°C
12 rain days
Good
June
80
23°C
Low: 17°C
11 rain days
Excellent
July
82
26°C
Low: 21°C
10 rain days
Excellent
August
82
25°C
Low: 21°C
10 rain days
Excellent
September
Best time to visit83
22°C
Low: 17°C
8 rain days
Excellent
October
68
15°C
Low: 10°C
9 rain days
Good
November
56
8°C
Low: 3°C
8 rain days
Mixed
December
43
2°C
Low: -3°C
9 rain days
Mixed
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Data based on 1994–2024 averages · Last updated: 2024-12-31