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Monthly
Precipitation
Temperature
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Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
The Blue Mountains, ON
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September
Average Temperature
High
20°
Feels 20
Low
11°
Feels 10
Average Precipitation
9 Days
Rain amount
42.4mm
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
24°
13
21°
14
16°
15
21°
16
20°
17
20°
18
19°
19
17°
20
14°
21
15°
22
17°
23
18°
24
18°
25
19°
26
18°
27
28
29
30
Forecast
Saturday, September 12, 2026
Day
24°
Feels 30
Wind
20 km/h S
Gust
30 km/h
Humidity
61%
P.O.P
40%
Rain
<1 mm
Night
16°
Feels 14
Wind
19 km/h NW
Gust
29 km/h
Humidity
94%
P.O.P
40%
Rain
<1 mm
Historical Averages
Sep 12
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.