S
M
T
W
T
F
S
30
84°
57°
31
79°
55°
1
78°
56°
2
77°
59°
3
78°
60°
4
78°
56°
5
81°
55°
6
75°
56°
7
76°
54°
8
76°
55°
9
77°
55°
10
76°
52°
11
76°
52°
12
74°
52°
13
75°
53°
14
74°
57°
15
76°
56°
16
78°
56°
17
79°
57°
18
79°
55°
19
80°
58°
20
Hist. Avg.
77°
52°
21
Hist. Avg.
76°
52°
22
Hist. Avg.
76°
52°
23
Hist. Avg.
75°
51°
24
Hist. Avg.
75°
51°
25
Hist. Avg.
75°
50°
26
Hist. Avg.
74°
50°
27
Hist. Avg.
74°
50°
28
Hist. Avg.
74°
49°
29
Hist. Avg.
73°
49°
30
Hist. Avg.
73°
49°
1
Hist. Avg.
73°
48°
2
Hist. Avg.
72°
48°
3
Hist. Avg.
72°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Colchester
Colchester's September 2026 forecast shows daily high temperatures ranging from 74° to 84°, with overnight lows between 52° and 60°. The average high for September is 77° with an average low of 56°. 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.
