S
M
T
W
T
F
S
30
85°
47°
31
86°
49°
1
83°
50°
2
85°
49°
3
86°
46°
4
78°
45°
5
80°
42°
6
78°
45°
7
82°
42°
8
75°
44°
9
76°
45°
10
75°
41°
11
74°
37°
12
72°
42°
13
73°
36°
14
71°
38°
15
72°
40°
16
72°
37°
17
70°
36°
18
72°
41°
19
74°
37°
20
72°
37°
21
73°
36°
22
71°
38°
23
74°
37°
24
Hist. Avg.
67°
41°
25
Hist. Avg.
66°
40°
26
Hist. Avg.
66°
40°
27
Hist. Avg.
66°
40°
28
Hist. Avg.
65°
39°
29
Hist. Avg.
64°
39°
30
Hist. Avg.
64°
39°
1
Hist. Avg.
64°
38°
2
Hist. Avg.
63°
38°
3
Hist. Avg.
62°
38°
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 70° to 86°, with overnight lows between 36° and 50°. The average high for September is 76° with an average low of 41°. 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.
