S
M
T
W
T
F
S
27
68°
51°
28
70°
45°
29
81°
48°
30
82°
52°
1
79°
47°
2
83°
48°
3
88°
54°
4
84°
58°
5
84°
56°
6
87°
54°
7
81°
49°
8
83°
48°
9
66°
50°
10
66°
51°
11
64°
42°
12
63°
41°
13
69°
40°
14
66°
41°
15
82°
45°
16
82°
48°
17
80°
47°
18
69°
45°
19
60°
51°
20
63°
43°
21
74°
51°
22
58°
52°
23
61°
43°
24
65°
40°
25
67°
39°
26
61°
39°
27
61°
40°
28
72°
43°
29
70°
41°
30
70°
44°
31
67°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Guerneville
Guerneville's October 2026 forecast shows daily high temperatures ranging from 67° to 72°, with overnight lows between 40° and 44°. The average high for October is 70° with an average low of 42°. 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 Guerneville. See also: November | December | January.
