S
M
T
W
T
F
S
26
108°
76°
27
102°
77°
28
101°
71°
29
97°
68°
30
98°
61°
31
106°
70°
1
107°
71°
2
107°
66°
3
106°
67°
4
104°
68°
5
104°
68°
6
106°
63°
7
107°
62°
8
105°
66°
9
104°
70°
10
101°
71°
11
100°
68°
12
92°
68°
13
86°
66°
14
88°
62°
15
91°
57°
16
95°
60°
17
100°
62°
18
101°
65°
19
103°
69°
20
103°
69°
21
103°
76°
22
98°
71°
23
97°
64°
24
94°
72°
25
98°
64°
26
100°
67°
27
100°
71°
28
97°
68°
29
92°
65°
30
78°
61°
31
74°
55°
1
84°
57°
2
88°
61°
3
90°
52°
4
90°
60°
5
92°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Green River
Green River's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Green River. See also: September | October | November.