S
M
T
W
T
F
S
26
62°
49°
27
68°
47°
28
75°
44°
29
78°
46°
30
79°
44°
1
77°
47°
2
64°
53°
3
67°
54°
4
67°
46°
5
68°
52°
6
76°
55°
7
75°
52°
8
71°
52°
9
79°
45°
10
79°
52°
11
89°
48°
12
62°
62°
13
72°
53°
14
74°
47°
15
76°
52°
16
74°
54°
17
78°
49°
18
88°
62°
19
91°
54°
20
91°
49°
21
92°
49°
22
82°
47°
23
67°
53°
24
68°
53°
25
68°
50°
26
72°
51°
27
79°
54°
28
74°
54°
29
70°
50°
30
73°
49°
31
77°
50°
1
78°
51°
2
78°
51°
3
77°
52°
4
75°
53°
5
72°
51°
6
70°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Nicasio
Nicasio's May 2026 forecast shows daily high temperatures ranging from 67° to 79°, with overnight lows between 49° and 54°. The average high for May is 73° with an average low of 52°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Nicasio. See also: June | July | August.
