S
M
T
W
T
F
S
26
59°
50°
27
64°
49°
28
69°
49°
29
73°
51°
30
70°
52°
1
68°
54°
2
66°
53°
3
68°
51°
4
70°
52°
5
71°
51°
6
72°
50°
7
74°
52°
8
71°
54°
9
73°
54°
10
74°
51°
11
72°
49°
12
75°
53°
13
77°
52°
14
76°
53°
15
77°
53°
16
75°
52°
17
75°
50°
18
69°
49°
19
68°
47°
20
69°
48°
21
69°
51°
22
72°
50°
23
76°
53°
24
78°
54°
25
77°
54°
26
76°
53°
27
77°
54°
28
78°
52°
29
75°
50°
30
73°
50°
31
71°
48°
1
71°
48°
2
72°
50°
3
71°
50°
4
71°
51°
5
72°
50°
6
72°
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 66° to 78°, with overnight lows between 47° and 54°. The average high for May is 73° with an average low of 51°. 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.