S
M
T
W
T
F
S
27
57°
31°
28
46°
24°
29
45°
21°
30
47°
26°
1
46°
23°
2
54°
25°
3
45°
20°
4
44°
24°
5
48°
29°
6
42°
26°
7
42°
24°
8
50°
28°
9
54°
30°
10
53°
29°
11
54°
31°
12
51°
20°
13
38°
17°
14
37°
16°
15
36°
15°
16
36°
15°
17
37°
14°
18
35°
13°
19
36°
16°
20
36°
14°
21
37°
18°
22
45°
21°
23
47°
23°
24
47°
26°
25
38°
23°
26
42°
18°
27
39°
14°
28
34°
12°
29
35°
14°
30
38°
13°
31
35°
14°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Yellowstone Lake
Yellowstone Lake's October 2026 forecast shows daily high temperatures ranging from 34° to 57°, with overnight lows between 12° and 31°. The average high for October is 43° with an average low of 21°. 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 Yellowstone Lake. See also: November | December | January.
