S
M
T
W
T
F
S
28
77°
55°
29
80°
56°
30
78°
57°
1
79°
61°
2
93°
66°
3
92°
74°
4
90°
60°
5
83°
56°
6
79°
54°
7
76°
51°
8
77°
58°
9
84°
62°
10
83°
61°
11
82°
58°
12
78°
59°
13
78°
58°
14
77°
59°
15
77°
60°
16
79°
59°
17
78°
58°
18
78°
59°
19
81°
60°
20
76°
58°
21
76°
60°
22
77°
59°
23
76°
58°
24
76°
58°
25
82°
61°
26
83°
61°
27
83°
60°
28
82°
62°
29
82°
62°
30
81°
61°
31
80°
60°
1
80°
61°
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 76° to 90°, with overnight lows between 51° and 62°. The average high for July is 80° with an average low of 59°. 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.
