S
M
T
W
T
F
S
27
61°
49°
28
61°
49°
29
60°
48°
30
61°
49°
1
61°
49°
2
60°
48°
3
60°
49°
4
59°
48°
5
60°
49°
6
59°
49°
7
59°
48°
8
58°
48°
9
59°
47°
10
59°
46°
11
58°
45°
12
53°
44°
13
54°
46°
14
57°
46°
15
56°
45°
16
56°
44°
17
55°
46°
18
53°
45°
19
55°
44°
20
53°
43°
21
52°
41°
22
52°
41°
23
53°
43°
24
53°
39°
25
52°
40°
26
53°
43°
27
50°
42°
28
54°
40°
29
55°
42°
30
50°
43°
31
52°
43°
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 50° to 61°, with overnight lows between 39° and 49°. The average high for October is 56° 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.
