S
M
T
W
T
F
S
30
87°
62°
31
86°
71°
1
94°
73°
2
86°
74°
3
96°
75°
4
90°
67°
5
81°
64°
6
79°
59°
7
79°
63°
8
82°
64°
9
83°
63°
10
81°
65°
11
82°
62°
12
78°
60°
13
80°
60°
14
81°
61°
15
77°
64°
16
77°
65°
17
75°
60°
18
74°
57°
19
73°
58°
20
74°
60°
21
77°
63°
22
80°
63°
23
81°
64°
24
81°
62°
25
79°
61°
26
78°
61°
27
79°
62°
28
79°
61°
29
80°
60°
30
74°
59°
1
70°
57°
2
72°
59°
3
77°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Millsboro
Millsboro's September 2026 forecast shows daily high temperatures ranging from 70° to 96°, with overnight lows between 57° and 75°. The average high for September is 80° with an average low of 63°. 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 Millsboro. See also: October | November | December.
