S
M
T
W
T
F
S
30
77°
50°
31
78°
49°
1
78°
48°
2
69°
46°
3
68°
44°
4
69°
42°
5
70°
45°
6
72°
45°
7
75°
46°
8
76°
47°
9
77°
48°
10
76°
48°
11
74°
49°
12
74°
48°
13
75°
46°
14
73°
44°
15
71°
43°
16
70°
44°
17
69°
45°
18
69°
44°
19
65°
36°
20
69°
44°
21
71°
42°
22
71°
42°
23
Hist. Avg.
68°
36°
24
Hist. Avg.
68°
36°
25
Hist. Avg.
67°
36°
26
Hist. Avg.
67°
36°
27
Hist. Avg.
66°
35°
28
Hist. Avg.
66°
35°
29
Hist. Avg.
66°
35°
30
Hist. Avg.
65°
34°
1
Hist. Avg.
65°
34°
2
Hist. Avg.
64°
34°
3
Hist. Avg.
64°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in McKinnon
McKinnon's September 2026 forecast shows daily high temperatures ranging from 65° to 78°, with overnight lows between 36° and 50°. The average high for September is 72° with an average low of 45°. 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 McKinnon. See also: October | November | December.