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°
46°
4
75°
50°
5
55°
38°
6
54°
37°
7
56°
36°
8
55°
38°
9
57°
38°
10
59°
42°
11
62°
41°
12
59°
41°
13
63°
47°
14
64°
46°
15
63°
47°
16
62°
46°
17
69°
51°
18
64°
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 54° to 77°, with overnight lows between 36° 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.
