S
M
T
W
T
F
S
30
81°
56°
31
80°
50°
1
76°
49°
2
73°
51°
3
73°
50°
4
74°
50°
5
72°
49°
6
72°
49°
7
73°
48°
8
72°
50°
9
72°
51°
10
70°
48°
11
72°
49°
12
73°
49°
13
71°
50°
14
73°
49°
15
69°
47°
16
70°
47°
17
67°
46°
18
69°
47°
19
72°
51°
20
Hist. Avg.
69°
48°
21
Hist. Avg.
68°
47°
22
Hist. Avg.
68°
47°
23
Hist. Avg.
68°
46°
24
Hist. Avg.
67°
46°
25
Hist. Avg.
67°
46°
26
Hist. Avg.
66°
45°
27
Hist. Avg.
66°
45°
28
Hist. Avg.
66°
45°
29
Hist. Avg.
65°
44°
30
Hist. Avg.
65°
44°
1
Hist. Avg.
64°
44°
2
Hist. Avg.
64°
43°
3
Hist. Avg.
64°
43°
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 67° to 81°, with overnight lows between 46° and 56°. The average high for September is 73° with an average low of 49°. 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.
