S
M
T
W
T
F
S
27
47°
40°
28
47°
41°
29
48°
43°
30
47°
42°
1
47°
40°
2
46°
40°
3
46°
41°
4
47°
41°
5
46°
42°
6
45°
40°
7
46°
41°
8
46°
40°
9
45°
41°
10
46°
42°
11
47°
40°
12
48°
38°
13
46°
38°
14
45°
41°
15
47°
40°
16
47°
40°
17
48°
41°
18
48°
41°
19
47°
40°
20
48°
39°
21
47°
39°
22
47°
38°
23
46°
38°
24
46°
37°
25
45°
37°
26
44°
38°
27
45°
38°
28
46°
39°
29
46°
37°
30
47°
36°
31
46°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Umnak
Umnak's October 2026 forecast shows daily high temperatures ranging from 44° to 48°, with overnight lows between 36° and 43°. The average high for October is 46° with an average low of 40°. 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 Umnak. See also: November | December | January.