S
M
T
W
T
F
S
30
68°
42°
31
67°
43°
1
68°
44°
2
68°
45°
3
69°
47°
4
67°
46°
5
67°
43°
6
65°
46°
7
66°
43°
8
67°
40°
9
67°
45°
10
69°
41°
11
63°
41°
12
71°
40°
13
69°
47°
14
71°
45°
15
66°
47°
16
71°
46°
17
70°
46°
18
70°
45°
19
71°
45°
20
71°
43°
21
66°
44°
22
63°
41°
23
64°
37°
24
62°
36°
25
57°
37°
26
66°
34°
27
66°
35°
28
56°
34°
29
56°
35°
30
56°
37°
1
55°
31°
2
55°
29°
3
Hist. Avg.
60°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Millbridge
Millbridge's September 2026 forecast shows daily high temperatures ranging from 55° to 71°, with overnight lows between 29° and 47°. The average high for September is 65° with an average low of 41°. 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 Millbridge. See also: October | November | December.