S
M
T
W
T
F
S
26
59°
50°
27
64°
49°
28
71°
46°
29
75°
47°
30
74°
46°
1
75°
46°
2
59°
50°
3
65°
53°
4
62°
46°
5
63°
50°
6
69°
51°
7
65°
53°
8
71°
51°
9
73°
53°
10
81°
52°
11
86°
55°
12
85°
55°
13
75°
51°
14
75°
53°
15
74°
52°
16
73°
51°
17
72°
52°
18
73°
51°
19
74°
50°
20
69°
48°
21
70°
50°
22
70°
48°
23
71°
48°
24
71°
50°
25
70°
49°
26
71°
49°
27
74°
50°
28
71°
50°
29
77°
53°
30
78°
54°
31
78°
54°
1
77°
53°
2
75°
54°
3
73°
53°
4
72°
54°
5
72°
52°
6
73°
50°
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 65° to 86°, with overnight lows between 48° and 55°. The average high for May is 74° 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 Larkspur. See also: June | July | August.