S
M
T
W
T
F
S
26
66°
57°
27
64°
54°
28
73°
52°
29
86°
61°
30
90°
61°
31
66°
52°
1
70°
52°
2
72°
54°
3
75°
52°
4
82°
64°
5
77°
64°
6
70°
57°
7
68°
57°
8
72°
54°
9
82°
55°
10
70°
57°
11
66°
50°
12
70°
48°
13
81°
52°
14
90°
55°
15
72°
57°
16
72°
57°
17
70°
55°
18
64°
54°
19
68°
57°
20
68°
52°
21
70°
55°
22
66°
55°
23
64°
55°
24
70°
52°
25
N/A
26
74°
59°
27
75°
62°
28
71°
58°
29
68°
59°
30
69°
58°
31
66°
55°
1
66°
52°
2
66°
53°
3
67°
52°
4
68°
52°
5
67°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Flensburg
Flensburg's August 2026 forecast shows daily high temperatures ranging from 66° to 75°, with overnight lows between 52° and 62°. The average high for August is 69° with an average low of 56°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Flensburg. See also: September | October | November.