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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Wellesley, ON
Exceptional El Niño dominates this fall
Content continues below
September
Average Temperature
High
21°
Feels 21
Low
10°
Feels 10
Average Precipitation
9 Days
Rain amount
53.8mm
Snow amount
0cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
21°
19
18°
20
19°
21
15°
22
16°
23
15°
24
14°
25
18°
26
19°
27
19°
28
18°
29
19°
30
19°
Forecast
Friday, September 18, 2026
Day
21°
Feels 22
Wind
18 km/h N
Gust
27 km/h
Humidity
52%
P.O.P
20%
Night
9°
Feels 6
Wind
19 km/h N
Gust
29 km/h
Humidity
71%
P.O.P
40%
Rain
<1 mm
Historical Averages
Sep 18
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.