S
M
T
W
T
F
S
26
64°
41°
27
68°
45°
28
57°
45°
29
68°
43°
30
72°
50°
1
61°
50°
2
59°
50°
3
59°
48°
4
57°
52°
5
59°
50°
6
57°
46°
7
57°
50°
8
63°
46°
9
66°
45°
10
61°
39°
11
57°
37°
12
61°
37°
13
57°
46°
14
54°
45°
15
55°
37°
16
55°
39°
17
57°
46°
18
55°
48°
19
59°
54°
20
57°
54°
21
68°
55°
22
61°
52°
23
61°
45°
24
N/A
25
74°
63°
26
75°
63°
27
75°
60°
28
66°
57°
29
63°
57°
30
63°
57°
31
63°
57°
1
60°
56°
2
61°
54°
3
60°
54°
4
61°
53°
5
60°
54°
6
61°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Morriston
Morriston's May 2026 forecast shows daily high temperatures ranging from 60° to 75°, with overnight lows between 48° and 63°. The average high for May is 65° 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 Morriston. See also: June | July | August.
