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Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Waterdown, ON
Exceptional El Niño dominates this fall
Content continues below
September
Average Temperature
High
22°
Feels 23
Low
13°
Feels 12
Average Precipitation
10 Days
Rain amount
71.5mm
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
19°
20
20°
21
16°
22
16°
23
16°
24
15°
25
18°
26
20°
27
20°
28
19°
29
19°
30
20°
Forecast
Saturday, September 19, 2026
Day
19°
Feels 19
Wind
22 km/h E
Gust
33 km/h
Humidity
56%
P.O.P
30%
Night
15°
Feels 14
Wind
19 km/h E
Gust
29 km/h
Humidity
77%
P.O.P
60%
Rain
~1 mm
Historical Averages
Sep 19
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.