S
M
T
W
T
F
S
26
96°
67°
27
96°
67°
28
95°
70°
29
92°
70°
30
89°
68°
31
89°
65°
1
90°
68°
2
89°
66°
3
89°
64°
4
90°
66°
5
88°
64°
6
88°
63°
7
89°
63°
8
89°
64°
9
92°
66°
10
95°
67°
11
90°
60°
12
87°
61°
13
90°
62°
14
89°
63°
15
93°
64°
16
94°
63°
17
94°
63°
18
93°
62°
19
92°
63°
20
93°
63°
21
94°
62°
22
93°
64°
23
92°
63°
24
93°
66°
25
92°
60°
26
85°
63°
27
87°
64°
28
86°
64°
29
86°
62°
30
87°
57°
31
85°
57°
1
85°
59°
2
84°
58°
3
83°
59°
4
82°
56°
5
81°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grand Junction
Grand Junction's August 2026 forecast shows daily high temperatures ranging from 81° to 96°, with overnight lows between 56° and 70°. The average high for August is 90° with an average low of 63°. 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 Grand Junction. See also: September | October | November.
