S
M
T
W
T
F
S
30
71°
61°
31
76°
64°
1
83°
65°
2
84°
68°
3
79°
60°
4
71°
54°
5
74°
56°
6
74°
53°
7
75°
50°
8
75°
52°
9
74°
61°
10
71°
51°
11
71°
45°
12
77°
48°
13
73°
50°
14
65°
45°
15
67°
50°
16
69°
54°
17
69°
50°
18
66°
45°
19
63°
45°
20
67°
48°
21
58°
42°
22
62°
41°
23
65°
43°
24
N/A
25
68°
39°
26
72°
43°
27
72°
45°
28
73°
47°
29
70°
54°
30
68°
55°
1
69°
53°
2
68°
51°
3
65°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Mildmay
Mildmay's September 2026 forecast shows daily high temperatures ranging from 65° to 73°, with overnight lows between 39° and 55°. The average high for September is 69° 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 Mildmay. See also: October | November | December.