S
M
T
W
T
F
S
26
81°
64°
27
77°
59°
28
84°
57°
29
93°
52°
30
99°
59°
31
97°
59°
1
86°
61°
2
86°
61°
3
97°
57°
4
100°
70°
5
94°
66°
6
77°
60°
7
79°
60°
8
84°
64°
9
89°
66°
10
82°
60°
11
84°
63°
12
87°
67°
13
90°
67°
14
81°
61°
15
79°
60°
16
78°
61°
17
72°
56°
18
71°
54°
19
71°
52°
20
70°
51°
21
70°
51°
22
69°
49°
23
70°
50°
24
70°
49°
25
73°
50°
26
77°
57°
27
77°
56°
28
75°
52°
29
72°
49°
30
71°
48°
31
70°
48°
1
74°
52°
2
75°
52°
3
68°
51°
4
68°
50°
5
65°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Altdorf
Altdorf's August 2026 forecast shows daily high temperatures ranging from 65° to 100°, with overnight lows between 48° and 70°. The average high for August is 77° 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 Altdorf. See also: September | October | November.
