S
M
T
W
T
F
S
26
67°
42°
27
70°
46°
28
61°
47°
29
51°
41°
30
54°
37°
1
46°
36°
2
51°
33°
3
61°
38°
4
76°
42°
5
59°
41°
6
57°
37°
7
52°
39°
8
61°
44°
9
68°
45°
10
57°
40°
11
55°
38°
12
56°
44°
13
61°
47°
14
65°
49°
15
67°
48°
16
64°
47°
17
63°
47°
18
61°
49°
19
69°
52°
20
67°
52°
21
69°
44°
22
64°
43°
23
62°
44°
24
64°
44°
25
64°
45°
26
65°
45°
27
64°
46°
28
65°
45°
29
66°
46°
30
67°
54°
31
72°
52°
1
68°
51°
2
70°
52°
3
73°
57°
4
75°
57°
5
77°
58°
6
77°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lowell
Lowell's May 2026 forecast shows daily high temperatures ranging from 52° to 77°, with overnight lows between 37° and 59°. The average high for May is 65° with an average low of 47°. 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 Lowell. See also: June | July | August.
