S
M
T
W
T
F
S
28
77°
57°
29
73°
54°
30
75°
59°
1
72°
55°
2
67°
49°
3
65°
50°
4
63°
52°
5
62°
51°
6
63°
52°
7
72°
57°
8
75°
61°
9
77°
62°
10
73°
58°
11
71°
59°
12
70°
58°
13
68°
57°
14
65°
58°
15
68°
59°
16
67°
58°
17
66°
59°
18
67°
60°
19
68°
59°
20
62°
59°
21
64°
58°
22
67°
57°
23
67°
60°
24
69°
60°
25
68°
59°
26
69°
60°
27
68°
60°
28
69°
59°
29
63°
56°
30
65°
59°
31
68°
60°
1
69°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Waltham
Waltham's July 2026 forecast shows daily high temperatures ranging from 62° to 77°, with overnight lows between 49° and 62°. The average high for July is 68° with an average low of 58°. 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 Waltham. See also: August | September | October.
