S
M
T
W
T
F
S
26
69°
53°
27
69°
56°
28
74°
51°
29
76°
52°
30
75°
55°
1
77°
58°
2
74°
56°
3
67°
59°
4
69°
58°
5
70°
57°
6
72°
59°
7
75°
60°
8
77°
60°
9
77°
61°
10
79°
60°
11
78°
62°
12
76°
63°
13
82°
62°
14
79°
63°
15
77°
63°
16
76°
62°
17
83°
61°
18
77°
62°
19
78°
62°
20
78°
61°
21
77°
62°
22
77°
62°
23
78°
63°
24
79°
63°
25
78°
62°
26
77°
62°
27
76°
61°
28
71°
60°
29
70°
59°
30
70°
59°
31
71°
61°
1
72°
63°
2
75°
62°
3
74°
62°
4
73°
61°
5
73°
60°
6
72°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Pico - Union
Pico - Union's May 2026 forecast shows daily high temperatures ranging from 69° to 83°, with overnight lows between 57° and 63°. The average high for May is 75° with an average low of 61°. 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 Pico - Union. See also: June | July | August.
