S
M
T
W
T
F
S
30
75°
54°
31
76°
54°
1
74°
55°
2
73°
56°
3
74°
57°
4
72°
57°
5
73°
54°
6
74°
55°
7
72°
54°
8
73°
52°
9
71°
53°
10
72°
59°
11
71°
52°
12
72°
52°
13
75°
51°
14
73°
57°
15
73°
57°
16
71°
51°
17
69°
50°
18
70°
50°
19
70°
54°
20
73°
56°
21
73°
55°
22
69°
53°
23
73°
54°
24
71°
52°
25
72°
53°
26
66°
46°
27
71°
46°
28
64°
47°
29
63°
47°
30
65°
49°
1
65°
45°
2
Hist. Avg.
68°
46°
3
Hist. Avg.
68°
46°
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 63° to 76°, with overnight lows between 45° and 59°. The average high for September is 71° 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.
