S
M
T
W
T
F
S
30
85°
70°
31
84°
69°
1
85°
68°
2
78°
64°
3
77°
64°
4
77°
65°
5
78°
63°
6
79°
66°
7
81°
68°
8
81°
68°
9
80°
67°
10
83°
68°
11
84°
68°
12
83°
67°
13
84°
69°
14
83°
62°
15
77°
60°
16
75°
60°
17
74°
59°
18
74°
57°
19
73°
58°
20
74°
57°
21
76°
58°
22
78°
63°
23
79°
56°
24
80°
56°
25
72°
55°
26
73°
56°
27
74°
61°
28
76°
61°
29
78°
54°
30
73°
56°
1
70°
60°
2
72°
60°
3
74°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Green Creek
Green Creek's September 2026 forecast shows daily high temperatures ranging from 70° to 85°, with overnight lows between 54° and 70°. The average high for September is 78° with an average low of 62°. 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 Creek. See also: October | November | December.