S
M
T
W
T
F
S
30
82°
60°
31
81°
59°
1
82°
57°
2
79°
56°
3
80°
56°
4
80°
57°
5
81°
60°
6
80°
60°
7
86°
56°
8
83°
60°
9
83°
64°
10
84°
64°
11
85°
63°
12
86°
53°
13
81°
61°
14
78°
61°
15
84°
63°
16
79°
61°
17
85°
53°
18
79°
52°
19
76°
61°
20
80°
51°
21
83°
50°
22
73°
49°
23
72°
50°
24
Hist. Avg.
76°
55°
25
Hist. Avg.
76°
55°
26
Hist. Avg.
75°
54°
27
Hist. Avg.
75°
54°
28
Hist. Avg.
75°
54°
29
Hist. Avg.
74°
53°
30
Hist. Avg.
74°
53°
1
Hist. Avg.
74°
52°
2
Hist. Avg.
73°
52°
3
Hist. Avg.
73°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Greeley
Greeley's September 2026 forecast shows daily high temperatures ranging from 72° to 86°, with overnight lows between 49° and 64°. The average high for September is 81° with an average low of 57°. 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 Greeley. See also: October | November | December.
