S
M
T
W
T
F
S
30
64°
54°
31
57°
50°
1
54°
50°
2
55°
50°
3
55°
52°
4
57°
50°
5
N/A
6
50°
44°
7
56°
50°
8
53°
46°
9
53°
42°
10
53°
44°
11
52°
44°
12
53°
47°
13
54°
46°
14
55°
47°
15
54°
44°
16
52°
45°
17
51°
44°
18
50°
37°
19
47°
36°
20
48°
35°
21
47°
35°
22
46°
36°
23
46°
36°
24
47°
39°
25
50°
39°
26
50°
34°
27
44°
34°
28
45°
39°
29
47°
39°
30
49°
38°
1
47°
34°
2
44°
32°
3
48°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Harstad
Harstad's September 2026 forecast shows daily high temperatures ranging from 44° to 56°, with overnight lows between 32° and 50°. The average high for September is 50° with an average low of 40°. 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 Harstad. See also: October | November | December.
