S
M
T
W
T
F
S
26
35°
30°
27
36°
26°
28
58°
25°
29
58°
29°
30
57°
29°
1
53°
33°
2
50°
38°
3
58°
41°
4
45°
40°
5
63°
39°
6
58°
41°
7
49°
38°
8
45°
42°
9
48°
40°
10
50°
39°
11
53°
41°
12
49°
45°
13
54°
41°
14
53°
40°
15
49°
37°
16
48°
36°
17
46°
37°
18
50°
38°
19
49°
36°
20
47°
40°
21
51°
39°
22
49°
38°
23
48°
40°
24
54°
40°
25
54°
39°
26
48°
40°
27
51°
40°
28
50°
38°
29
49°
38°
30
48°
38°
31
49°
37°
1
52°
42°
2
57°
43°
3
54°
42°
4
53°
39°
5
50°
40°
6
54°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Port Union
Port Union's May 2026 forecast shows daily high temperatures ranging from 45° to 58°, with overnight lows between 36° and 45°. The average high for May is 51° with an average low of 39°. 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 Port Union. See also: June | July | August.
