S
M
T
W
T
F
S
26
68°
32°
27
66°
36°
28
67°
30°
29
53°
37°
30
59°
42°
1
58°
40°
2
57°
34°
3
47°
40°
4
61°
36°
5
77°
38°
6
58°
49°
7
63°
41°
8
57°
33°
9
62°
30°
10
56°
46°
11
64°
45°
12
57°
30°
13
63°
35°
14
67°
42°
15
67°
40°
16
78°
38°
17
78°
44°
18
71°
40°
19
79°
46°
20
90°
50°
21
59°
35°
22
65°
30°
23
68°
30°
24
72°
36°
25
58°
48°
26
79°
46°
27
66°
46°
28
51°
43°
29
55°
39°
30
53°
34°
31
57°
35°
1
64°
38°
2
63°
38°
3
73°
46°
4
76°
50°
5
78°
53°
6
72°
48°
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 53° to 78°, with overnight lows between 34° and 53°. The average high for May is 66° with an average low of 42°. 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.
