Annual mean 11°C · wettest around March · prevailing wind SW
Warmest
27.7 °C
Coldest
-2.8 °C
Wettest
41%
Windiest
5.9 m/s
Prevailing
SW
4.8 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 Downers Grove over the whole year is 11°C. July is the hottest month, with highs of about 27°C; January is the coldest, with lows of about -5°C. Downers Grove has no sharply defined rainy season: the chance of rain on a given day runs from 29% in January, the driest month, to 33% in March, the wettest. Winds in Downers Grove are highest in March, averaging 4.7 m/s (17 km/h), and lightest in August, at 3.0 m/s (11 km/h). The prevailing wind is from the SW. The clearest skies in Downers Grove come in August, when the sky is typically 45% covered; January is the cloudiest month, at 68%.
Month by month Downers Grove 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
29%
68%
4.4 m/s
0
0
1
February
1°C
-3°C
-5°C
29%
58%
4.5 m/s
1
0
9
March
7°C
2°C
1°C
33%
60%
4.7 m/s
4
0
22
April
12°C
6°C
7°C
31%
60%
4.6 m/s
20
1
46
May
19°C
13°C
16°C
33%
57%
4.0 m/s
50
13
61
June
26°C
19°C
24°C
30%
47%
3.7 m/s
59
40
38
July
27°C
21°C
28°C
31%
46%
3.1 m/s
48
57
18
August
27°C
20°C
27°C
30%
45%
3.0 m/s
55
53
24
September
24°C
16°C
22°C
30%
47%
3.3 m/s
67
32
50
October
16°C
10°C
12°C
32%
54%
3.8 m/s
36
5
61
November
8°C
3°C
2°C
30%
57%
4.2 m/s
7
0
27
December
2°C
-1°C
-4°C
32%
65%
4.2 m/s
0
0
7
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 Downers Grove weather by season
Year round, Downers Grove has days of about -2°C at their warmest in January, its coolest month, and 27°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 11°C around the clock. Rain is most likely around March and least likely around January. 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.
Downers Grove weather in winterDecember to February
High 0°CLow -3°CRain 30%
Winter in Downers Grove has typical daily highs of about 0°C and lows of about -3°C, with a 30% chance of rain on a given day.
Downers Grove weather in springMarch to May
High 13°CLow 7°CRain 32%
Spring in Downers Grove has typical daily highs of about 13°C and lows of about 7°C, with a 32% chance of rain on a given day.
Downers Grove weather in summerJune to August
High 27°CLow 20°CRain 30%
Summer in Downers Grove has typical daily highs of about 27°C and lows of about 20°C, with a 30% chance of rain on a given day.
Downers Grove weather in autumnSeptember to November
High 16°CLow 10°CRain 31%
Autumn in Downers Grove has typical daily highs of about 16°C and lows of about 10°C, with a 31% chance of rain on a given day.
When is the rainy season in Downers Grove?
Downers Grove has no sharply defined rainy season: the chance of rain on a given day runs from 29% in January, the driest month, to 33% in March, the wettest.
What time of year is Downers Grove windiest?
Winds in Downers Grove are highest in March, averaging 4.7 m/s (17 km/h), and lightest in August, at 3.0 m/s (11 km/h). The prevailing wind is from the SW.
What is the average temperature in Downers Grove year round?
The average temperature in Downers Grove over the whole year is 11°C. July is the hottest month, with highs of about 27°C; January is the coldest, with lows of about -5°C.