S
M
T
W
T
F
S
30
76°
54°
31
77°
55°
1
77°
55°
2
75°
49°
3
66°
48°
4
67°
48°
5
74°
48°
6
69°
43°
7
70°
52°
8
74°
52°
9
76°
51°
10
76°
47°
11
73°
41°
12
66°
50°
13
74°
51°
14
74°
51°
15
73°
50°
16
74°
51°
17
75°
51°
18
75°
50°
19
74°
49°
20
73°
42°
21
69°
40°
22
63°
48°
23
63°
49°
24
67°
49°
25
71°
46°
26
71°
39°
27
64°
38°
28
59°
40°
29
60°
37°
30
61°
40°
1
63°
44°
2
65°
47°
3
67°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mildmay
Mildmay's September 2026 forecast shows daily high temperatures ranging from 59° to 77°, with overnight lows between 37° and 55°. The average high for September is 70° with an average low of 47°. 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.