S
M
T
W
T
F
S
30
72°
59°
31
N/A
1
72°
55°
2
70°
62°
3
76°
64°
4
75°
57°
5
71°
57°
6
74°
58°
7
74°
60°
8
71°
57°
9
71°
57°
10
69°
55°
11
70°
51°
12
67°
51°
13
68°
50°
14
68°
51°
15
69°
51°
16
66°
50°
17
67°
51°
18
68°
53°
19
69°
52°
20
66°
51°
21
67°
52°
22
68°
53°
23
68°
51°
24
66°
49°
25
66°
46°
26
65°
48°
27
66°
51°
28
66°
51°
29
65°
52°
30
66°
51°
1
67°
51°
2
66°
50°
3
66°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Colchester
Colchester's September 2026 forecast shows daily high temperatures ranging from 65° to 76°, with overnight lows between 46° and 64°. The average high for September is 69° with an average low of 53°. 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 Colchester. See also: October | November | December.
