S
M
T
W
T
F
S
30
72°
51°
31
76°
54°
1
79°
47°
2
75°
48°
3
72°
47°
4
73°
48°
5
73°
55°
6
77°
54°
7
79°
53°
8
72°
53°
9
70°
54°
10
73°
53°
11
73°
50°
12
72°
52°
13
71°
51°
14
69°
45°
15
68°
45°
16
68°
44°
17
67°
45°
18
68°
50°
19
71°
50°
20
72°
51°
21
73°
47°
22
67°
42°
23
66°
48°
24
65°
49°
25
72°
42°
26
70°
40°
27
Hist. Avg.
66°
44°
28
Hist. Avg.
65°
44°
29
Hist. Avg.
65°
44°
30
Hist. Avg.
64°
43°
1
Hist. Avg.
64°
43°
2
Hist. Avg.
64°
42°
3
Hist. Avg.
63°
42°
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 65° to 79°, with overnight lows between 40° and 55°. The average high for September is 72° 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 Greeley. See also: October | November | December.
