S
M
T
W
T
F
S
26
78°
58°
27
75°
57°
28
74°
58°
29
76°
59°
30
74°
58°
31
74°
57°
1
73°
55°
2
73°
54°
3
74°
58°
4
73°
58°
5
75°
57°
6
74°
55°
7
78°
56°
8
78°
58°
9
78°
58°
10
79°
57°
11
78°
54°
12
77°
53°
13
77°
56°
14
75°
53°
15
76°
51°
16
73°
55°
17
77°
55°
18
72°
53°
19
72°
51°
20
73°
56°
21
77°
56°
22
77°
55°
23
76°
56°
24
74°
56°
25
76°
50°
26
74°
49°
27
70°
48°
28
69°
49°
29
70°
51°
30
73°
52°
31
72°
53°
1
68°
54°
2
71°
53°
3
73°
48°
4
72°
52°
5
73°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Rocky Mountain
Rocky Mountain's August 2026 forecast shows daily high temperatures ranging from 68° to 79°, with overnight lows between 48° and 59°. The average high for August is 74° with an average low of 54°. 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 Rocky Mountain. See also: September | October | November.