S
M
T
W
T
F
S
30
72°
54°
31
71°
50°
1
59°
48°
2
61°
46°
3
68°
44°
4
69°
53°
5
55°
48°
6
55°
48°
7
63°
54°
8
56°
45°
9
55°
41°
10
59°
45°
11
64°
51°
12
51°
39°
13
67°
40°
14
65°
56°
15
63°
46°
16
71°
44°
17
68°
47°
18
57°
47°
19
47°
40°
20
50°
38°
21
58°
46°
22
53°
38°
23
56°
42°
24
69°
48°
25
65°
46°
26
64°
45°
27
59°
44°
28
56°
43°
29
61°
46°
30
58°
44°
1
58°
43°
2
54°
44°
3
58°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Gander
Gander's September 2026 forecast shows daily high temperatures ranging from 53° to 69°, with overnight lows between 38° and 48°. The average high for September is 59° with an average low of 44°. 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 Gander. See also: October | November | December.