S
M
T
W
T
F
S
30
82°
47°
31
72°
46°
1
69°
56°
2
71°
59°
3
70°
50°
4
76°
47°
5
77°
47°
6
80°
50°
7
88°
51°
8
88°
57°
9
91°
56°
10
90°
55°
11
89°
54°
12
85°
54°
13
85°
55°
14
84°
52°
15
82°
54°
16
78°
52°
17
84°
53°
18
83°
51°
19
77°
49°
20
79°
54°
21
80°
51°
22
83°
51°
23
77°
52°
24
75°
47°
25
74°
47°
26
73°
48°
27
74°
47°
28
74°
47°
29
75°
48°
30
74°
51°
1
74°
47°
2
75°
48°
3
81°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Atlas
Atlas's September 2026 forecast shows daily high temperatures ranging from 69° to 91°, with overnight lows between 47° and 59°. The average high for September is 79° with an average low of 51°. 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 Atlas. See also: October | November | December.
