S
M
T
W
T
F
S
26
66°
34°
27
71°
36°
28
61°
36°
29
54°
44°
30
52°
43°
1
63°
38°
2
55°
37°
3
56°
37°
4
74°
34°
5
86°
50°
6
73°
52°
7
64°
43°
8
61°
35°
9
55°
33°
10
70°
47°
11
63°
44°
12
61°
38°
13
55°
37°
14
57°
46°
15
58°
48°
16
79°
47°
17
85°
54°
18
72°
53°
19
92°
68°
20
88°
49°
21
64°
37°
22
66°
44°
23
64°
47°
24
58°
46°
25
63°
51°
26
67°
51°
27
70°
50°
28
73°
51°
29
72°
52°
30
77°
54°
31
79°
55°
1
77°
48°
2
67°
50°
3
67°
49°
4
66°
52°
5
68°
53°
6
75°
53°
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 58° to 92°, with overnight lows between 37° and 68°. The average high for May is 71° with an average low of 51°. 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.
