S
M
T
W
T
F
S
31
78°
48°
1
80°
59°
2
74°
53°
3
81°
49°
4
87°
52°
5
90°
61°
6
92°
63°
7
93°
69°
8
81°
62°
9
84°
56°
10
89°
72°
11
98°
74°
12
100°
70°
13
88°
69°
14
94°
67°
15
82°
64°
16
80°
57°
17
89°
62°
18
96°
70°
19
85°
64°
20
86°
60°
21
94°
69°
22
93°
71°
23
83°
60°
24
86°
64°
25
91°
70°
26
88°
70°
27
89°
66°
28
88°
68°
29
92°
65°
30
93°
66°
1
94°
71°
2
92°
69°
3
90°
71°
4
89°
67°
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 83° to 94°, with overnight lows between 60° and 71°. The average high for June is 90° with an average low of 68°. 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.
