S
M
T
W
T
F
S
28
77°
55°
29
80°
56°
30
78°
57°
1
81°
62°
2
94°
69°
3
97°
67°
4
87°
60°
5
80°
58°
6
79°
57°
7
77°
56°
8
79°
58°
9
78°
60°
10
80°
58°
11
79°
60°
12
80°
59°
13
78°
58°
14
77°
56°
15
75°
55°
16
76°
55°
17
78°
60°
18
78°
59°
19
81°
60°
20
80°
61°
21
76°
61°
22
75°
60°
23
77°
62°
24
76°
62°
25
80°
61°
26
80°
61°
27
81°
62°
28
80°
61°
29
83°
62°
30
82°
63°
31
83°
62°
1
82°
63°
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 75° to 97°, with overnight lows between 55° and 69°. The average high for July is 80° with an average low of 60°. 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.
