S
M
T
W
T
F
S
26
91°
57°
27
89°
53°
28
93°
51°
29
92°
55°
30
93°
55°
31
96°
52°
1
96°
58°
2
79°
57°
3
76°
46°
4
82°
43°
5
86°
45°
6
90°
46°
7
93°
48°
8
94°
50°
9
89°
51°
10
91°
51°
11
88°
50°
12
89°
52°
13
82°
61°
14
75°
54°
15
79°
48°
16
78°
51°
17
86°
52°
18
89°
56°
19
89°
49°
20
95°
47°
21
97°
52°
22
93°
60°
23
86°
55°
24
83°
50°
25
91°
55°
26
91°
53°
27
88°
49°
28
86°
49°
29
80°
46°
30
77°
48°
31
80°
47°
1
79°
49°
2
82°
49°
3
82°
47°
4
79°
48°
5
75°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Missoula
Missoula's August 2026 forecast shows daily high temperatures ranging from 75° to 91°, with overnight lows between 46° and 55°. The average high for August is 83° with an average low of 49°. 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 Missoula. See also: September | October | November.
