S
M
T
W
T
F
S
26
93°
57°
27
92°
64°
28
94°
59°
29
93°
58°
30
95°
60°
31
95°
57°
1
103°
62°
2
85°
53°
3
74°
48°
4
79°
52°
5
90°
56°
6
93°
59°
7
93°
61°
8
94°
60°
9
86°
59°
10
85°
59°
11
90°
61°
12
87°
59°
13
87°
58°
14
96°
63°
15
89°
59°
16
82°
55°
17
82°
56°
18
86°
58°
19
88°
58°
20
88°
57°
21
86°
57°
22
84°
56°
23
86°
56°
24
86°
52°
25
74°
47°
26
80°
54°
27
86°
57°
28
85°
56°
29
86°
55°
30
83°
56°
31
79°
56°
1
82°
54°
2
73°
52°
3
74°
49°
4
79°
54°
5
82°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Helena Valley Southeast
Helena Valley Southeast's August 2026 forecast shows daily high temperatures ranging from 73° to 103°, with overnight lows between 47° and 63°. The average high for August is 85° 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 Helena Valley Southeast. See also: September | October | November.
