S
M
T
W
T
F
S
26
86°
61°
27
82°
70°
28
79°
64°
29
70°
61°
30
66°
52°
1
67°
46°
2
67°
42°
3
70°
52°
4
79°
58°
5
79°
61°
6
71°
50°
7
67°
48°
8
70°
55°
9
75°
57°
10
75°
59°
11
77°
63°
12
77°
61°
13
76°
59°
14
79°
60°
15
79°
65°
16
81°
64°
17
81°
65°
18
82°
65°
19
81°
66°
20
83°
66°
21
83°
65°
22
82°
66°
23
77°
66°
24
80°
65°
25
82°
67°
26
81°
67°
27
79°
62°
28
78°
63°
29
82°
64°
30
80°
63°
31
82°
67°
1
83°
67°
2
86°
68°
3
86°
68°
4
84°
67°
5
80°
63°
6
80°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Somerville
Somerville's May 2026 forecast shows daily high temperatures ranging from 67° to 86°, with overnight lows between 42° and 68°. The average high for May is 78° with an average low of 61°. 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 Somerville. See also: June | July | August.
