S
M
T
W
T
F
S
26
57°
28°
27
46°
32°
28
52°
32°
29
50°
32°
30
34°
32°
1
50°
28°
2
61°
32°
3
64°
41°
4
64°
41°
5
41°
28°
6
36°
27°
7
61°
30°
8
61°
34°
9
68°
41°
10
61°
39°
11
77°
43°
12
73°
50°
13
75°
50°
14
77°
55°
15
73°
46°
16
70°
45°
17
59°
41°
18
39°
32°
19
46°
32°
20
50°
32°
21
63°
36°
22
52°
34°
23
64°
36°
24
72°
45°
25
73°
48°
26
68°
45°
27
58°
45°
28
71°
50°
29
73°
46°
30
73°
42°
31
73°
44°
1
73°
48°
2
72°
48°
3
74°
47°
4
75°
46°
5
75°
50°
6
80°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Larkspur
Larkspur's May 2026 forecast shows daily high temperatures ranging from 58° to 80°, with overnight lows between 42° and 51°. The average high for May is 72° with an average low of 47°. 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 Larkspur. See also: June | July | August.