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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Sisters Island, BC
Content continues below
September
Average Temperature
High
17°
Feels 17
Low
13°
Feels 12
Average Precipitation
8 Days
Rain amount
35.7mm
Snow amount
0cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
17°
4
17°
5
18°
6
17°
7
17°
8
18°
9
18°
10
17°
11
18°
12
17°
13
17°
14
17°
15
17°
16
18°
17
18°
18
19
20
21
22
23
24
25
26
27
28
29
30
Forecast
Thursday, September 3, 2026
Day
17°
Feels 17
Wind
32 km/h E
Gust
48 km/h
Humidity
68%
P.O.P
40%
Rain
~1 mm
Night
14°
Feels 13
Wind
14 km/h W
Gust
21 km/h
Humidity
88%
P.O.P
60%
Rain
<1 mm
Historical Averages
Sep 3
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.