S
M
T
W
T
F
S
26
100°
77°
27
100°
74°
28
101°
74°
29
98°
71°
30
98°
64°
31
101°
67°
1
104°
71°
2
104°
71°
3
105°
70°
4
103°
70°
5
101°
64°
6
100°
60°
7
103°
65°
8
102°
67°
9
100°
69°
10
99°
70°
11
98°
71°
12
91°
64°
13
87°
66°
14
86°
65°
15
89°
66°
16
89°
66°
17
91°
71°
18
93°
68°
19
92°
66°
20
88°
67°
21
90°
66°
22
90°
67°
23
89°
68°
24
90°
66°
25
89°
60°
26
84°
60°
27
83°
59°
28
84°
60°
29
85°
63°
30
85°
62°
31
84°
59°
1
84°
58°
2
82°
58°
3
81°
57°
4
81°
59°
5
82°
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 93°, with overnight lows between 57° and 71°. The average high for August is 87° 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.
