S
M
T
W
T
F
S
26
94°
59°
27
91°
55°
28
96°
54°
29
91°
54°
30
95°
55°
31
95°
65°
1
102°
57°
2
84°
53°
3
67°
42°
4
77°
38°
5
84°
42°
6
83°
49°
7
90°
45°
8
86°
56°
9
83°
51°
10
89°
49°
11
86°
50°
12
75°
48°
13
64°
54°
14
59°
54°
15
74°
54°
16
82°
54°
17
82°
55°
18
85°
54°
19
85°
54°
20
88°
56°
21
91°
61°
22
87°
57°
23
86°
55°
24
83°
54°
25
87°
53°
26
87°
55°
27
83°
49°
28
79°
49°
29
89°
54°
30
81°
51°
31
72°
52°
1
73°
48°
2
77°
52°
3
81°
52°
4
78°
51°
5
81°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Great Falls
Great Falls's August 2026 forecast shows daily high temperatures ranging from 72° to 91°, with overnight lows between 48° and 61°. The average high for August is 83° with an average low of 53°. 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 Great Falls. See also: September | October | November.
