S
M
T
W
T
F
S
31
80°
62°
1
79°
60°
2
73°
57°
3
73°
59°
4
77°
63°
5
74°
64°
6
80°
64°
7
79°
62°
8
76°
63°
9
78°
61°
10
78°
62°
11
83°
66°
12
84°
67°
13
84°
67°
14
85°
68°
15
86°
68°
16
85°
67°
17
84°
68°
18
86°
67°
19
82°
66°
20
85°
68°
21
86°
68°
22
86°
67°
23
87°
69°
24
86°
69°
25
87°
64°
26
83°
63°
27
81°
64°
28
81°
64°
29
82°
65°
30
85°
64°
1
83°
65°
2
83°
65°
3
84°
64°
4
83°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Dumbarton
Dumbarton's June 2026 forecast shows daily high temperatures ranging from 73° to 87°, with overnight lows between 57° and 69°. The average high for June is 82° with an average low of 65°. 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 Dumbarton. See also: July | August | September.
