S
M
T
W
T
F
S
26
60°
55°
27
62°
53°
28
66°
54°
29
65°
54°
30
63°
53°
1
61°
54°
2
57°
54°
3
62°
55°
4
63°
55°
5
63°
55°
6
68°
54°
7
66°
54°
8
69°
56°
9
75°
53°
10
73°
56°
11
81°
57°
12
81°
58°
13
72°
57°
14
72°
56°
15
70°
56°
16
68°
54°
17
71°
56°
18
69°
53°
19
73°
57°
20
73°
56°
21
72°
55°
22
71°
55°
23
73°
57°
24
74°
57°
25
74°
56°
26
73°
56°
27
67°
55°
28
66°
55°
29
67°
56°
30
67°
56°
31
68°
57°
1
70°
57°
2
73°
58°
3
72°
57°
4
67°
56°
5
68°
55°
6
66°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Alameda
Alameda's May 2026 forecast shows daily high temperatures ranging from 63° to 81°, with overnight lows between 53° and 58°. The average high for May is 71° with an average low of 56°. 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 Alameda. See also: June | July | August.