S
M
T
W
T
F
S
31
67°
59°
1
79°
58°
2
82°
54°
3
83°
58°
4
80°
64°
5
84°
63°
6
86°
61°
7
85°
67°
8
78°
70°
9
85°
65°
10
88°
66°
11
74°
59°
12
81°
55°
13
75°
59°
14
70°
55°
15
77°
48°
16
72°
54°
17
71°
56°
18
72°
57°
19
69°
49°
20
74°
53°
21
71°
54°
22
77°
51°
23
79°
60°
24
77°
58°
25
73°
56°
26
77°
57°
27
77°
56°
28
78°
66°
29
89°
76°
30
87°
71°
1
82°
66°
2
78°
65°
3
82°
66°
4
73°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Waltham
Waltham's June 2026 forecast shows daily high temperatures ranging from 73° to 82°, with overnight lows between 61° and 66°. The average high for June is 78° with an average low of 64°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Waltham. See also: July | August | September.
