S
M
T
W
T
F
S
26
55°
37°
27
55°
39°
28
59°
43°
29
61°
45°
30
61°
45°
1
62°
44°
2
62°
45°
3
59°
42°
4
57°
39°
5
57°
39°
6
58°
41°
7
57°
40°
8
58°
39°
9
60°
42°
10
62°
47°
11
66°
47°
12
64°
46°
13
61°
42°
14
61°
45°
15
62°
44°
16
60°
42°
17
60°
42°
18
59°
43°
19
59°
41°
20
60°
42°
21
58°
43°
22
64°
45°
23
63°
45°
24
63°
47°
25
66°
49°
26
66°
49°
27
68°
48°
28
70°
50°
29
70°
50°
30
69°
47°
31
70°
44°
1
68°
47°
2
67°
46°
3
66°
43°
4
68°
50°
5
68°
51°
6
70°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Chelmsford
Chelmsford's May 2026 forecast shows daily high temperatures ranging from 55° to 70°, with overnight lows between 37° and 51°. The average high for May is 63° with an average low of 44°. 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 Chelmsford. See also: June | July | August.
