S
M
T
W
T
F
S
27
N/A
28
62°
52°
29
60°
52°
30
63°
53°
1
76°
53°
2
64°
48°
3
57°
33°
4
64°
32°
5
57°
42°
6
57°
38°
7
59°
32°
8
59°
46°
9
55°
41°
10
52°
32°
11
62°
31°
12
55°
44°
13
47°
41°
14
49°
46°
15
50°
33°
16
57°
35°
17
42°
27°
18
54°
27°
19
67°
31°
20
56°
29°
21
57°
27°
22
54°
27°
23
55°
26°
24
56°
22°
25
62°
26°
26
53°
30°
27
43°
23°
28
47°
22°
29
66°
30°
30
54°
29°
31
43°
30°
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 54°, with overnight lows between 29° and 30°. The average high for October is 49° with an average low of 30°. 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.
