Annual mean 11°C · wettest around April · prevailing wind SE
Warmest
25.5 °C
Coldest
-2.5 °C
Wettest
21%
Windiest
7.2 m/s
Prevailing
SE
6.2 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 Evanston over the whole year is 11°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -4°C. Evanston has no sharply defined rainy season: the chance of rain on a given day runs from 9% in August, the driest month, to 14% in April, the wettest. Winds in Evanston are highest in January, averaging 6.5 m/s (23 km/h), and lightest in July, at 4.7 m/s (17 km/h). The prevailing wind is from the SE. The clearest skies in Evanston come in August, when the sky is typically 48% covered; January is the cloudiest month, at 71%.
Month by month Evanston 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
-4°C
-9°C
11%
71%
6.5 m/s
0
0
1
February
1°C
-2°C
-6°C
10%
61%
6.5 m/s
0
0
5
March
5°C
2°C
-2°C
12%
63%
6.5 m/s
2
0
12
April
10°C
7°C
4°C
14%
64%
6.4 m/s
11
0
31
May
16°C
13°C
12°C
12%
60%
5.5 m/s
37
7
56
June
23°C
19°C
21°C
10%
51%
5.2 m/s
60
27
52
July
25°C
22°C
25°C
10%
50%
4.7 m/s
61
47
32
August
25°C
21°C
24°C
9%
48%
4.9 m/s
67
44
36
September
22°C
18°C
20°C
10%
51%
5.3 m/s
68
20
61
October
15°C
11°C
10°C
13%
57%
6.2 m/s
29
2
56
November
7°C
4°C
1°C
10%
61%
6.5 m/s
4
0
20
December
2°C
-0°C
-4°C
11%
68%
6.3 m/s
0
0
5
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 Evanston weather by season
Year round, Evanston has days of about -2°C at their warmest in January, its coolest month, and 25°C in July, its warmest; the coolest hours of the day run from -4°C to 22°C through the year, and the average temperature over the year is 11°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.
Evanston weather in winterDecember to February
High 0°CLow -2°CRain 11%
Winter in Evanston has typical daily highs of about 0°C and lows of about -2°C, with a 11% chance of rain on a given day.
Evanston weather in springMarch to May
High 10°CLow 7°CRain 13%
Spring in Evanston has typical daily highs of about 10°C and lows of about 7°C, with a 13% chance of rain on a given day.
Evanston weather in summerJune to August
High 24°CLow 21°CRain 10%
Summer in Evanston has typical daily highs of about 24°C and lows of about 21°C, with a 10% chance of rain on a given day.
Evanston weather in autumnSeptember to November
High 15°CLow 11°CRain 11%
Autumn in Evanston has typical daily highs of about 15°C and lows of about 11°C, with a 11% chance of rain on a given day.
When is the rainy season in Evanston?
Evanston has no sharply defined rainy season: the chance of rain on a given day runs from 9% in August, the driest month, to 14% in April, the wettest.
What time of year is Evanston windiest?
Winds in Evanston are highest in January, averaging 6.5 m/s (23 km/h), and lightest in July, at 4.7 m/s (17 km/h). The prevailing wind is from the SE.
What is the average temperature in Evanston year round?
The average temperature in Evanston over the whole year is 11°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -4°C.