S
M
T
W
T
F
S
27
57°
31°
28
52°
25°
29
49°
27°
30
46°
22°
1
51°
29°
2
54°
30°
3
55°
30°
4
56°
27°
5
44°
27°
6
42°
20°
7
41°
18°
8
40°
20°
9
39°
18°
10
38°
17°
11
38°
16°
12
39°
16°
13
37°
15°
14
40°
18°
15
45°
22°
16
38°
18°
17
37°
16°
18
36°
15°
19
39°
20°
20
45°
22°
21
41°
24°
22
36°
22°
23
38°
14°
24
38°
13°
25
33°
14°
26
36°
19°
27
40°
14°
28
35°
17°
29
34°
11°
30
31°
12°
31
31°
19°
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 31° to 57°, with overnight lows between 11° and 31°. The average high for October is 41° with an average low of 20°. 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.
