S
M
T
W
T
F
S
30
91°
59°
31
95°
55°
1
84°
64°
2
82°
54°
3
84°
50°
4
82°
55°
5
83°
52°
6
76°
46°
7
80°
50°
8
84°
53°
9
91°
59°
10
80°
57°
11
73°
53°
12
71°
52°
13
67°
50°
14
67°
49°
15
67°
47°
16
71°
47°
17
72°
49°
18
70°
50°
19
74°
53°
20
72°
52°
21
70°
52°
22
67°
50°
23
66°
49°
24
70°
51°
25
71°
51°
26
71°
49°
27
70°
45°
28
61°
42°
29
59°
40°
30
59°
42°
1
60°
43°
2
59°
40°
3
59°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sag
Sag's September 2026 forecast shows daily high temperatures ranging from 59° to 91°, with overnight lows between 40° and 59°. The average high for September is 70° 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 Sag. See also: October | November | December.