S
M
T
W
T
F
S
27
57°
46°
28
66°
44°
29
60°
40°
30
59°
37°
1
63°
45°
2
63°
45°
3
64°
43°
4
62°
44°
5
64°
40°
6
60°
41°
7
61°
44°
8
63°
42°
9
63°
40°
10
53°
38°
11
51°
35°
12
55°
41°
13
61°
43°
14
61°
41°
15
60°
40°
16
59°
40°
17
60°
29°
18
47°
28°
19
47°
30°
20
53°
40°
21
55°
39°
22
54°
38°
23
46°
38°
24
54°
39°
25
49°
39°
26
58°
28°
27
56°
26°
28
43°
26°
29
45°
27°
30
51°
34°
31
52°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Castlebar
Castlebar's October 2026 forecast shows daily high temperatures ranging from 43° to 66°, with overnight lows between 26° and 46°. The average high for October is 56° with an average low of 38°. 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 Castlebar. See also: November | December | January.
