S
M
T
W
T
F
S
26
60°
45°
27
65°
39°
28
73°
36°
29
80°
37°
30
83°
39°
1
87°
43°
2
74°
47°
3
64°
46°
4
65°
44°
5
68°
46°
6
80°
42°
7
90°
45°
8
90°
48°
9
90°
44°
10
92°
47°
11
95°
48°
12
89°
53°
13
82°
53°
14
87°
42°
15
88°
46°
16
80°
44°
17
77°
42°
18
79°
46°
19
86°
51°
20
88°
54°
21
87°
53°
22
83°
52°
23
82°
51°
24
81°
50°
25
78°
49°
26
80°
49°
27
81°
48°
28
84°
52°
29
88°
52°
30
84°
48°
31
85°
53°
1
86°
54°
2
87°
54°
3
87°
55°
4
86°
55°
5
87°
54°
6
87°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in California Valley
California Valley's May 2026 forecast shows daily high temperatures ranging from 77° to 88°, with overnight lows between 42° and 55°. The average high for May is 84° 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 California Valley. See also: June | July | August.
