S
M
T
W
T
F
S
30
89°
62°
31
90°
68°
1
93°
67°
2
95°
69°
3
95°
70°
4
90°
69°
5
82°
61°
6
80°
57°
7
80°
58°
8
79°
58°
9
80°
56°
10
84°
60°
11
81°
54°
12
78°
54°
13
77°
54°
14
79°
53°
15
79°
57°
16
76°
58°
17
77°
56°
18
75°
53°
19
79°
56°
20
79°
57°
21
78°
56°
22
79°
56°
23
80°
55°
24
80°
56°
25
79°
54°
26
77°
54°
27
78°
54°
28
77°
54°
29
78°
53°
30
77°
52°
1
76°
51°
2
76°
51°
3
75°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in McArthur
McArthur's September 2026 forecast shows daily high temperatures ranging from 75° to 95°, with overnight lows between 50° and 70°. The average high for September is 80° with an average low of 57°. 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 McArthur. See also: October | November | December.
