S
M
T
W
T
F
S
27
59°
48°
28
61°
43°
29
64°
43°
30
66°
54°
1
59°
48°
2
64°
50°
3
59°
46°
4
61°
50°
5
61°
52°
6
57°
39°
7
54°
36°
8
54°
36°
9
57°
46°
10
54°
48°
11
55°
43°
12
63°
45°
13
63°
46°
14
61°
48°
15
55°
48°
16
54°
37°
17
54°
30°
18
52°
27°
19
50°
28°
20
54°
48°
21
54°
45°
22
52°
36°
23
46°
30°
24
52°
36°
25
52°
45°
26
61°
46°
27
61°
46°
28
55°
50°
29
57°
46°
30
56°
49°
31
57°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Dumbarton
Dumbarton's October 2026 forecast shows daily high temperatures ranging from 56° to 57°, with overnight lows between 41° and 49°. The average high for October is 57° with an average low of 45°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Dumbarton. See also: November | December | January.
