S
M
T
W
T
F
S
30
89°
63°
31
90°
54°
1
90°
64°
2
94°
58°
3
94°
67°
4
94°
61°
5
92°
69°
6
88°
64°
7
91°
67°
8
82°
56°
9
79°
53°
10
86°
51°
11
94°
60°
12
73°
49°
13
65°
55°
14
85°
56°
15
70°
50°
16
70°
52°
17
79°
49°
18
84°
65°
19
75°
61°
20
67°
56°
21
69°
51°
22
62°
53°
23
76°
59°
24
74°
60°
25
64°
58°
26
80°
56°
27
78°
53°
28
75°
63°
29
77°
58°
30
74°
51°
1
65°
44°
2
71°
42°
3
76°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mullen
Mullen's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Mullen. See also: October | November | December.