S
M
T
W
T
F
S
30
83°
58°
31
89°
55°
1
90°
61°
2
92°
55°
3
92°
54°
4
96°
53°
5
96°
57°
6
92°
60°
7
93°
61°
8
90°
62°
9
83°
56°
10
92°
47°
11
93°
53°
12
82°
53°
13
95°
60°
14
87°
54°
15
75°
55°
16
81°
54°
17
77°
54°
18
77°
49°
19
81°
48°
20
80°
49°
21
81°
51°
22
78°
51°
23
74°
48°
24
78°
55°
25
78°
46°
26
77°
47°
27
81°
50°
28
81°
50°
29
70°
47°
30
76°
43°
1
74°
45°
2
80°
47°
3
79°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Greeley
Greeley's September 2026 forecast shows daily high temperatures ranging from 70° to 95°, with overnight lows between 43° and 60°. The average high for September is 80° with an average low of 50°. 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.
