S
M
T
W
T
F
S
30
55°
41°
31
60°
40°
1
55°
39°
2
54°
39°
3
53°
40°
4
53°
39°
5
54°
36°
6
52°
38°
7
52°
38°
8
53°
37°
9
52°
37°
10
51°
38°
11
50°
36°
12
52°
37°
13
51°
36°
14
50°
36°
15
51°
35°
16
51°
38°
17
52°
37°
18
50°
34°
19
50°
33°
20
48°
33°
21
Hist. Avg.
47°
37°
22
Hist. Avg.
47°
37°
23
Hist. Avg.
46°
37°
24
Hist. Avg.
46°
36°
25
Hist. Avg.
46°
36°
26
Hist. Avg.
45°
35°
27
Hist. Avg.
45°
35°
28
Hist. Avg.
44°
35°
29
Hist. Avg.
44°
34°
30
Hist. Avg.
43°
34°
1
Hist. Avg.
43°
33°
2
Hist. Avg.
42°
33°
3
Hist. Avg.
42°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Napaimiut
Napaimiut's September 2026 forecast shows daily high temperatures ranging from 48° to 60°, with overnight lows between 33° and 41°. The average high for September is 52° with an average low of 37°. 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 Napaimiut. See also: October | November | December.