S
M
T
W
T
F
S
30
82°
62°
31
82°
62°
1
84°
64°
2
86°
66°
3
86°
66°
4
85°
65°
5
86°
66°
6
81°
64°
7
81°
63°
8
85°
65°
9
84°
62°
10
85°
61°
11
83°
64°
12
84°
63°
13
83°
63°
14
82°
62°
15
83°
63°
16
83°
62°
17
80°
62°
18
82°
62°
19
Hist. Avg.
79°
60°
20
Hist. Avg.
79°
59°
21
Hist. Avg.
78°
59°
22
Hist. Avg.
78°
58°
23
Hist. Avg.
78°
58°
24
Hist. Avg.
77°
58°
25
Hist. Avg.
77°
57°
26
Hist. Avg.
77°
57°
27
Hist. Avg.
76°
56°
28
Hist. Avg.
76°
56°
29
Hist. Avg.
76°
56°
30
Hist. Avg.
75°
55°
1
Hist. Avg.
75°
55°
2
Hist. Avg.
75°
54°
3
Hist. Avg.
74°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Millboro
Millboro's September 2026 forecast shows daily high temperatures ranging from 80° to 86°, with overnight lows between 61° and 66°. The average high for September is 83° 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 Millboro. See also: October | November | December.