S
M
T
W
T
F
S
30
79°
63°
31
81°
66°
1
84°
61°
2
85°
60°
3
78°
61°
4
79°
62°
5
80°
67°
6
84°
66°
7
86°
66°
8
80°
65°
9
79°
66°
10
83°
65°
11
83°
64°
12
81°
64°
13
80°
61°
14
80°
58°
15
77°
58°
16
75°
57°
17
75°
57°
18
76°
61°
19
78°
62°
20
79°
63°
21
80°
60°
22
79°
56°
23
75°
61°
24
74°
62°
25
80°
55°
26
73°
59°
27
78°
60°
28
79°
59°
29
Hist. Avg.
74°
51°
30
Hist. Avg.
74°
51°
1
Hist. Avg.
74°
51°
2
Hist. Avg.
73°
50°
3
Hist. Avg.
73°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Millsboro
Millsboro's September 2026 forecast shows daily high temperatures ranging from 73° to 86°, with overnight lows between 55° and 67°. The average high for September is 79° with an average low of 62°. 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.
