S
M
T
W
T
F
S
26
86°
67°
27
86°
67°
28
85°
66°
29
85°
64°
30
83°
63°
31
76°
59°
1
75°
58°
2
76°
57°
3
77°
59°
4
78°
64°
5
79°
63°
6
80°
64°
7
78°
64°
8
78°
62°
9
77°
60°
10
78°
56°
11
77°
55°
12
81°
65°
13
82°
66°
14
86°
64°
15
85°
63°
16
80°
65°
17
85°
63°
18
83°
62°
19
79°
55°
20
76°
54°
21
76°
53°
22
77°
54°
23
79°
55°
24
81°
56°
25
82°
55°
26
83°
59°
27
84°
62°
28
84°
60°
29
82°
60°
30
83°
61°
31
82°
56°
1
82°
52°
2
74°
51°
3
73°
55°
4
78°
60°
5
80°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Colchester
Colchester's August 2026 forecast shows daily high temperatures ranging from 73° to 86°, with overnight lows between 51° and 67°. The average high for August is 80° with an average low of 60°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Colchester. See also: September | October | November.