S
M
T
W
T
F
S
26
58°
41°
27
61°
44°
28
58°
44°
29
59°
41°
30
59°
44°
1
64°
47°
2
65°
48°
3
62°
45°
4
61°
47°
5
62°
48°
6
57°
42°
7
58°
45°
8
58°
43°
9
59°
41°
10
58°
47°
11
61°
48°
12
62°
48°
13
63°
46°
14
61°
43°
15
64°
45°
16
65°
45°
17
66°
49°
18
66°
50°
19
67°
49°
20
63°
49°
21
62°
46°
22
64°
50°
23
61°
49°
24
64°
50°
25
65°
51°
26
65°
50°
27
63°
48°
28
66°
51°
29
67°
51°
30
65°
50°
31
67°
51°
1
69°
51°
2
65°
49°
3
63°
49°
4
63°
50°
5
66°
48°
6
65°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Colchester
Colchester's May 2026 forecast shows daily high temperatures ranging from 57° to 69°, with overnight lows between 41° and 51°. The average high for May is 63° with an average low of 47°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Colchester. See also: June | July | August.