S
M
T
W
T
F
S
27
76°
55°
28
83°
45°
29
95°
46°
30
95°
50°
1
94°
46°
2
93°
51°
3
102°
52°
4
103°
58°
5
99°
57°
6
103°
53°
7
99°
51°
8
101°
50°
9
75°
51°
10
70°
49°
11
73°
46°
12
74°
42°
13
81°
41°
14
85°
41°
15
91°
44°
16
96°
45°
17
93°
45°
18
70°
44°
19
67°
55°
20
71°
46°
21
70°
51°
22
63°
53°
23
76°
49°
24
81°
43°
25
74°
47°
26
70°
45°
27
69°
44°
28
69°
47°
29
66°
48°
30
65°
47°
31
63°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Nicasio
Nicasio's October 2026 forecast shows daily high temperatures ranging from 63° to 74°, with overnight lows between 44° and 48°. The average high for October is 68° with an average low of 46°. 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 Nicasio. See also: November | December | January.