Annual mean 10°C · wettest around April · prevailing wind SW
Warmest
26.1 °C
Coldest
-2.9 °C
Wettest
16%
Windiest
6.0 m/s
Prevailing
SW
5.1 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Waukegan over the whole year is 10°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -5°C. Waukegan has no sharply defined rainy season: the chance of rain on a given day runs from 8% in August, the driest month, to 12% in April, the wettest. Winds in Waukegan are highest in February, averaging 4.8 m/s (17 km/h), and lightest in August, at 3.4 m/s (12 km/h). The prevailing wind is from the SW. The clearest skies in Waukegan come in July, when the sky is typically 36% covered; January is the cloudiest month, at 65%.
Month by month Waukegan climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
-2°C
-5°C
-8°C
9%
65%
4.7 m/s
0
0
1
February
0°C
-4°C
-6°C
8%
53%
4.8 m/s
1
0
6
March
5°C
1°C
-0°C
11%
54%
4.8 m/s
2
0
17
April
10°C
6°C
5°C
12%
54%
4.8 m/s
14
0
40
May
17°C
12°C
14°C
11%
49%
4.3 m/s
44
10
64
June
23°C
18°C
23°C
9%
38%
3.9 m/s
65
36
50
July
26°C
21°C
26°C
8%
36%
3.5 m/s
59
57
27
August
26°C
20°C
26°C
8%
38%
3.4 m/s
65
53
30
September
22°C
16°C
21°C
9%
42%
3.8 m/s
71
28
58
October
15°C
10°C
11°C
11%
49%
4.3 m/s
34
4
63
November
7°C
3°C
2°C
9%
52%
4.7 m/s
7
0
25
December
2°C
-1°C
-4°C
10%
60%
4.6 m/s
0
0
6
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Waukegan weather by season
Year round, Waukegan has days of about -2°C at their warmest in January, its coolest month, and 26°C in July, its warmest; the coolest hours of the day run from -5°C to 21°C through the year, and the average temperature over the year is 10°C around the clock. Rain is most likely around April and least likely around August. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Waukegan weather in winterDecember to February
High -0°CLow -3°CRain 9%
Winter in Waukegan has typical daily highs of about -0°C and lows of about -3°C, with a 9% chance of rain on a given day.
Waukegan weather in springMarch to May
High 11°CLow 6°CRain 11%
Spring in Waukegan has typical daily highs of about 11°C and lows of about 6°C, with a 11% chance of rain on a given day.
Waukegan weather in summerJune to August
High 25°CLow 20°CRain 8%
Summer in Waukegan has typical daily highs of about 25°C and lows of about 20°C, with a 8% chance of rain on a given day.
Waukegan weather in autumnSeptember to November
High 15°CLow 10°CRain 10%
Autumn in Waukegan has typical daily highs of about 15°C and lows of about 10°C, with a 10% chance of rain on a given day.
When is the rainy season in Waukegan?
Waukegan has no sharply defined rainy season: the chance of rain on a given day runs from 8% in August, the driest month, to 12% in April, the wettest.
What time of year is Waukegan windiest?
Winds in Waukegan are highest in February, averaging 4.8 m/s (17 km/h), and lightest in August, at 3.4 m/s (12 km/h). The prevailing wind is from the SW.
What is the average temperature in Waukegan year round?
The average temperature in Waukegan over the whole year is 10°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -5°C.