S
M
T
W
T
F
S
30
80°
61°
31
81°
60°
1
78°
61°
2
79°
64°
3
79°
66°
4
80°
61°
5
83°
60°
6
80°
61°
7
79°
59°
8
80°
60°
9
78°
61°
10
78°
63°
11
81°
58°
12
77°
58°
13
77°
57°
14
78°
58°
15
79°
63°
16
81°
62°
17
80°
57°
18
76°
55°
19
75°
56°
20
76°
60°
21
75°
55°
22
75°
57°
23
78°
59°
24
79°
60°
25
80°
61°
26
79°
53°
27
78°
53°
28
73°
52°
29
73°
51°
30
72°
51°
1
Hist. Avg.
79°
51°
2
Hist. Avg.
78°
51°
3
Hist. Avg.
78°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Colonial Beach
Colonial Beach's September 2026 forecast shows daily high temperatures ranging from 72° to 83°, with overnight lows between 51° and 66°. The average high for September is 78° with an average low of 59°. 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 Colonial Beach. See also: October | November | December.
