S
M
T
W
T
F
S
28
77°
59°
29
77°
60°
30
78°
61°
1
78°
60°
2
79°
61°
3
77°
61°
4
78°
62°
5
81°
63°
6
78°
62°
7
79°
62°
8
81°
64°
9
82°
62°
10
79°
66°
11
79°
68°
12
80°
66°
13
84°
63°
14
84°
64°
15
85°
70°
16
86°
68°
17
85°
67°
18
83°
66°
19
85°
69°
20
86°
66°
21
85°
69°
22
85°
66°
23
84°
63°
24
79°
62°
25
77°
63°
26
79°
63°
27
78°
66°
28
78°
66°
29
79°
67°
30
85°
67°
31
84°
68°
1
85°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Somerville
Somerville's July 2026 forecast shows daily high temperatures ranging from 77° to 86°, with overnight lows between 59° and 70°. The average high for July is 81° with an average low of 65°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Somerville. See also: August | September | October.