S
M
T
W
T
F
S
26
93°
66°
27
93°
68°
28
86°
68°
29
88°
64°
30
84°
70°
31
70°
63°
1
82°
61°
2
81°
59°
3
82°
66°
4
75°
57°
5
77°
48°
6
77°
54°
7
75°
55°
8
77°
50°
9
82°
64°
10
81°
61°
11
82°
64°
12
84°
64°
13
75°
63°
14
79°
63°
15
81°
68°
16
79°
61°
17
81°
52°
18
79°
57°
19
77°
48°
20
77°
52°
21
79°
58°
22
77°
50°
23
76°
55°
24
77°
65°
25
82°
61°
26
78°
56°
27
79°
58°
28
79°
58°
29
76°
55°
30
77°
60°
31
78°
58°
1
80°
58°
2
79°
57°
3
76°
54°
4
77°
60°
5
75°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Montrose
Montrose's August 2026 forecast shows daily high temperatures ranging from 75° to 82°, with overnight lows between 50° and 65°. The average high for August is 78° with an average low of 58°. 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 Montrose. See also: September | October | November.