S
M
T
W
T
F
S
28
87°
71°
29
88°
70°
30
88°
69°
1
90°
71°
2
89°
69°
3
88°
72°
4
89°
72°
5
87°
71°
6
86°
71°
7
87°
72°
8
87°
72°
9
88°
71°
10
86°
72°
11
88°
71°
12
90°
72°
13
91°
72°
14
90°
71°
15
85°
71°
16
85°
70°
17
86°
71°
18
86°
70°
19
84°
70°
20
84°
68°
21
85°
67°
22
85°
67°
23
86°
68°
24
85°
68°
25
86°
69°
26
87°
69°
27
87°
66°
28
87°
66°
29
88°
68°
30
89°
67°
31
87°
69°
1
88°
72°
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 84° to 91°, with overnight lows between 66° and 72°. The average high for July is 87° with an average low of 70°. 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.