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Monthly Historical Averages
Mississauga, ON
Ontario's 2026 Fall Forecast is here!
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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
22
23
18°
24
18°
25
21°
26
22°
27
21°
28
22°
29
22°
30
22°
Forecast
Wednesday, September 23, 2026
Day
18°
Feels 19
Wind
26 km/h E
Gust
39 km/h
Humidity
52%
P.O.P
20%
Night
8°
Feels 6
Wind
22 km/h E
Gust
33 km/h
Humidity
100%
P.O.P
10%
Historical Averages
Sep 23
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.
September
Average Temperature
High
22°
Feels 23
Low
13°
Feels 12
Average Precipitation
10 Days
Rain amount
66.9mm
Snow amount
0cm