S
M
T
W
T
F
S
30
61°
55°
31
60°
55°
1
60°
52°
2
59°
51°
3
59°
55°
4
60°
56°
5
61°
55°
6
62°
54°
7
61°
52°
8
60°
53°
9
60°
52°
10
59°
53°
11
58°
54°
12
59°
53°
13
59°
50°
14
Hist. Avg.
56°
47°
15
Hist. Avg.
56°
47°
16
Hist. Avg.
56°
47°
17
Hist. Avg.
56°
47°
18
Hist. Avg.
55°
47°
19
Hist. Avg.
55°
47°
20
Hist. Avg.
55°
46°
21
Hist. Avg.
55°
46°
22
Hist. Avg.
55°
46°
23
Hist. Avg.
55°
46°
24
Hist. Avg.
54°
46°
25
Hist. Avg.
54°
46°
26
Hist. Avg.
54°
46°
27
Hist. Avg.
54°
46°
28
Hist. Avg.
54°
46°
29
Hist. Avg.
54°
46°
30
Hist. Avg.
53°
46°
1
Hist. Avg.
53°
45°
2
Hist. Avg.
53°
45°
3
Hist. Avg.
53°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Stromness
Stromness's September 2026 forecast shows daily high temperatures ranging from 58° to 62°, with overnight lows between 50° and 56°. The average high for September is 60° with an average low of 53°. 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 Stromness. See also: October | November | December.