S
M
T
W
T
F
S
26
52°
37°
27
56°
38°
28
55°
41°
29
57°
40°
30
60°
40°
1
59°
42°
2
62°
44°
3
61°
41°
4
61°
41°
5
62°
41°
6
61°
42°
7
62°
41°
8
63°
39°
9
62°
40°
10
62°
47°
11
63°
40°
12
62°
39°
13
64°
47°
14
70°
49°
15
65°
48°
16
68°
47°
17
67°
48°
18
70°
51°
19
74°
49°
20
73°
44°
21
64°
43°
22
66°
48°
23
68°
48°
24
70°
52°
25
75°
51°
26
75°
50°
27
67°
49°
28
67°
52°
29
68°
50°
30
69°
48°
31
68°
52°
1
78°
52°
2
76°
54°
3
76°
53°
4
75°
54°
5
76°
52°
6
77°
49°
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 52° to 78°, with overnight lows between 37° and 54°. The average high for May is 66° with an average low of 46°. 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.
