S
M
T
W
T
F
S
26
59°
50°
27
64°
49°
28
71°
46°
29
75°
47°
30
72°
52°
1
70°
51°
2
64°
53°
3
65°
51°
4
65°
52°
5
71°
53°
6
72°
52°
7
73°
51°
8
71°
54°
9
76°
54°
10
74°
51°
11
76°
53°
12
80°
52°
13
73°
48°
14
69°
49°
15
69°
50°
16
68°
49°
17
69°
48°
18
68°
52°
19
68°
47°
20
69°
50°
21
72°
52°
22
76°
53°
23
77°
55°
24
78°
55°
25
78°
53°
26
74°
53°
27
71°
52°
28
70°
51°
29
70°
51°
30
71°
52°
31
71°
51°
1
72°
50°
2
72°
50°
3
73°
52°
4
76°
55°
5
75°
51°
6
73°
52°
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 64° to 80°, with overnight lows between 47° and 55°. The average high for May is 72° 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.