S
M
T
W
T
F
S
26
53°
37°
27
62°
40°
28
56°
35°
29
60°
33°
30
55°
35°
1
68°
30°
2
72°
41°
3
81°
43°
4
83°
44°
5
48°
36°
6
51°
35°
7
75°
44°
8
79°
47°
9
78°
48°
10
76°
46°
11
79°
49°
12
87°
53°
13
84°
51°
14
83°
51°
15
84°
56°
16
77°
51°
17
75°
50°
18
78°
51°
19
78°
48°
20
75°
51°
21
72°
46°
22
69°
48°
23
74°
52°
24
69°
48°
25
69°
46°
26
70°
46°
27
71°
52°
28
72°
54°
29
72°
55°
30
73°
53°
31
72°
49°
1
74°
56°
2
76°
57°
3
82°
57°
4
84°
56°
5
77°
58°
6
77°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Oakley
Oakley's May 2026 forecast shows daily high temperatures ranging from 48° to 87°, with overnight lows between 35° and 58°. The average high for May is 75° with an average low of 50°. 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 Oakley. See also: June | July | August.