S
M
T
W
T
F
S
30
75°
52°
31
76°
58°
1
81°
59°
2
74°
59°
3
83°
58°
4
82°
51°
5
79°
55°
6
76°
49°
7
74°
51°
8
79°
56°
9
81°
56°
10
80°
55°
11
75°
49°
12
73°
55°
13
77°
52°
14
79°
48°
15
71°
54°
16
70°
52°
17
69°
53°
18
70°
48°
19
76°
45°
20
69°
52°
21
73°
46°
22
72°
50°
23
73°
47°
24
76°
49°
25
75°
52°
26
75°
51°
27
74°
52°
28
75°
50°
29
74°
44°
30
67°
47°
1
73°
51°
2
75°
45°
3
72°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in McDonald
McDonald's September 2026 forecast shows daily high temperatures ranging from 67° to 83°, with overnight lows between 41° and 59°. The average high for September is 75° 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 McDonald. See also: October | November | December.