S
M
T
W
T
F
S
26
69°
49°
27
72°
51°
28
69°
57°
29
64°
47°
30
60°
39°
1
55°
41°
2
54°
36°
3
64°
35°
4
75°
52°
5
63°
47°
6
58°
44°
7
61°
38°
8
66°
47°
9
74°
52°
10
69°
53°
11
72°
43°
12
77°
42°
13
67°
47°
14
66°
39°
15
69°
43°
16
76°
59°
17
85°
62°
18
86°
67°
19
86°
65°
20
68°
56°
21
68°
53°
22
64°
56°
23
66°
58°
24
74°
59°
25
79°
57°
26
77°
59°
27
73°
58°
28
81°
52°
29
78°
56°
30
80°
51°
31
76°
56°
1
76°
54°
2
78°
55°
3
77°
59°
4
78°
61°
5
79°
61°
6
79°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Acton
Acton's May 2026 forecast shows daily high temperatures ranging from 73° to 81°, with overnight lows between 51° and 61°. The average high for May is 78° with an average low of 57°. 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 Acton. See also: June | July | August.
