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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Longueuil, QC
Exceptional El Niño dominates this fall
Content continues below
September
Average Temperature
High
21°
Feels 21
Low
13°
Feels 12
Average Precipitation
10 Days
Rain amount
72.5mm
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
19
20
17°
21
15°
22
16°
23
18°
24
18°
25
17°
26
18°
27
19°
28
19°
29
19°
30
19°
Forecast
Sunday, September 20, 2026
Day
17°
Feels 17
Wind
12 km/h NE
Gust
17 km/h
Humidity
63%
P.O.P
30%
Night
10°
Feels 6
Wind
20 km/h NW
Gust
30 km/h
Humidity
94%
P.O.P
20%
Historical Averages
Sep 20
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.