S
M
T
W
T
F
S
26
80°
64°
27
81°
64°
28
80°
63°
29
80°
64°
30
79°
64°
31
81°
63°
1
81°
64°
2
80°
63°
3
80°
62°
4
75°
57°
5
78°
62°
6
79°
63°
7
80°
63°
8
76°
62°
9
77°
61°
10
71°
55°
11
73°
55°
12
76°
58°
13
74°
55°
14
70°
53°
15
70°
54°
16
71°
52°
17
70°
55°
18
70°
53°
19
71°
56°
20
72°
57°
21
70°
53°
22
72°
54°
23
71°
53°
24
68°
56°
25
73°
59°
26
74°
52°
27
68°
51°
28
69°
52°
29
70°
57°
30
74°
54°
31
75°
56°
1
74°
55°
2
74°
55°
3
73°
57°
4
73°
56°
5
65°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Roggenburg
Roggenburg's August 2026 forecast shows daily high temperatures ranging from 65° to 81°, with overnight lows between 51° and 64°. The average high for August is 74° with an average low of 58°. 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 Roggenburg. See also: September | October | November.