S
M
T
W
T
F
S
30
82°
53°
31
74°
52°
1
75°
59°
2
79°
60°
3
73°
53°
4
72°
60°
5
72°
53°
6
77°
52°
7
75°
52°
8
74°
51°
9
71°
51°
10
71°
53°
11
72°
49°
12
69°
50°
13
70°
49°
14
73°
56°
15
76°
48°
16
68°
46°
17
66°
45°
18
66°
45°
19
65°
46°
20
66°
47°
21
66°
46°
22
67°
46°
23
67°
52°
24
72°
52°
25
72°
51°
26
71°
53°
27
72°
44°
28
68°
41°
29
61°
42°
30
61°
50°
1
62°
51°
2
66°
51°
3
67°
50°
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 61° to 82°, with overnight lows between 41° and 60°. The average high for September is 70° with an average low of 50°. 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.
