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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Aylmer, ON
Exceptional El Niño dominates this fall
Content continues below
Content continues below
September
Average Temperature
High
23°
Feels 23
Low
12°
Feels 12
Average Precipitation
10 Days
Rain amount
59.7mm
Snow amount
0cm
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
19
20
21°
21
16°
22
16°
23
16°
24
19°
25
21°
26
22°
27
21°
28
20°
29
20°
30
19°
Forecast
Sunday, September 20, 2026
Day
21°
Feels 22
Wind
18 km/h NE
Gust
27 km/h
Humidity
52%
P.O.P
40%
Rain
<1 mm
Night
13°
Feels 9
Wind
27 km/h NE
Gust
41 km/h
Humidity
89%
P.O.P
30%
Historical Averages
Sep 20
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.