S
M
T
W
T
F
S
27
78°
55°
28
83°
52°
29
91°
62°
30
94°
66°
1
92°
63°
2
93°
64°
3
97°
68°
4
94°
71°
5
97°
70°
6
97°
70°
7
95°
67°
8
96°
68°
9
95°
68°
10
73°
48°
11
70°
46°
12
69°
46°
13
71°
48°
14
82°
51°
15
86°
60°
16
92°
65°
17
88°
60°
18
80°
56°
19
66°
41°
20
71°
53°
21
75°
52°
22
66°
50°
23
74°
43°
24
78°
40°
25
77°
41°
26
71°
40°
27
70°
41°
28
71°
40°
29
67°
43°
30
63°
41°
31
72°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Clearlake
Clearlake's October 2026 forecast shows daily high temperatures ranging from 63° to 78°, with overnight lows between 40° and 53°. The average high for October is 71° with an average low of 44°. 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 Clearlake. See also: November | December | January.
