S
M
T
W
T
F
S
30
78°
61°
31
74°
55°
1
84°
57°
2
88°
61°
3
90°
52°
4
90°
60°
5
92°
64°
6
86°
55°
7
88°
60°
8
90°
57°
9
93°
58°
10
93°
56°
11
94°
56°
12
94°
70°
13
93°
65°
14
95°
72°
15
90°
60°
16
85°
63°
17
84°
68°
18
89°
65°
19
86°
63°
20
82°
58°
21
85°
53°
22
86°
56°
23
83°
58°
24
87°
54°
25
85°
60°
26
N/A
27
86°
56°
28
74°
59°
29
72°
55°
30
81°
58°
1
83°
52°
2
84°
54°
3
83°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Green River
Green River's September 2026 forecast shows daily high temperatures ranging from 83° to 84°, with overnight lows between 52° and 55°. The average high for September is 83° 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 September weather will actually feel in Green River. See also: October | November | December.
