S
M
T
W
T
F
S
26
70°
50°
27
71°
49°
28
70°
50°
29
71°
48°
30
66°
45°
1
66°
47°
2
67°
47°
3
66°
46°
4
66°
45°
5
65°
45°
6
67°
46°
7
69°
47°
8
71°
49°
9
74°
52°
10
73°
52°
11
75°
53°
12
74°
52°
13
72°
52°
14
75°
53°
15
76°
53°
16
73°
49°
17
73°
52°
18
75°
52°
19
75°
53°
20
72°
51°
21
69°
49°
22
69°
53°
23
70°
51°
24
69°
48°
25
70°
51°
26
76°
54°
27
78°
54°
28
79°
54°
29
72°
53°
30
71°
50°
31
73°
54°
1
72°
55°
2
77°
56°
3
80°
55°
4
81°
56°
5
81°
57°
6
82°
57°
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 82°, with overnight lows between 45° and 57°. The average high for May is 72° 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.