S
M
T
W
T
F
S
30
79°
57°
31
78°
56°
1
77°
55°
2
77°
50°
3
76°
48°
4
77°
49°
5
75°
48°
6
68°
47°
7
67°
51°
8
66°
54°
9
66°
54°
10
67°
50°
11
66°
46°
12
65°
48°
13
64°
50°
14
64°
48°
15
65°
45°
16
64°
46°
17
65°
48°
18
68°
52°
19
71°
48°
20
71°
46°
21
66°
42°
22
62°
42°
23
62°
45°
24
63°
43°
25
60°
42°
26
60°
44°
27
61°
47°
28
61°
43°
29
59°
45°
30
60°
43°
1
62°
48°
2
63°
50°
3
66°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Nanaimo
Nanaimo's September 2026 forecast shows daily high temperatures ranging from 59° to 79°, with overnight lows between 42° and 57°. The average high for September is 67° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Nanaimo. See also: October | November | December.
