S
M
T
W
T
F
S
26
61°
38°
27
67°
32°
28
62°
34°
29
59°
45°
30
54°
45°
1
63°
43°
2
57°
46°
3
54°
37°
4
73°
53°
5
83°
51°
6
70°
48°
7
65°
40°
8
60°
42°
9
59°
49°
10
73°
53°
11
64°
41°
12
63°
41°
13
64°
49°
14
69°
48°
15
72°
49°
16
70°
48°
17
70°
47°
18
68°
47°
19
72°
46°
20
68°
43°
21
69°
44°
22
69°
44°
23
70°
45°
24
70°
51°
25
71°
52°
26
77°
52°
27
76°
49°
28
72°
45°
29
70°
48°
30
73°
50°
31
79°
54°
1
78°
54°
2
73°
53°
3
75°
54°
4
78°
55°
5
78°
55°
6
80°
56°
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 59° to 80°, with overnight lows between 40° and 56°. The average high for May is 71° with an average low of 49°. 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.
