S
M
T
W
T
F
S
26
57°
38°
27
56°
34°
28
65°
45°
29
53°
39°
30
51°
30°
1
47°
28°
2
45°
29°
3
51°
42°
4
59°
48°
5
53°
38°
6
51°
34°
7
47°
33°
8
46°
34°
9
50°
37°
10
50°
38°
11
52°
38°
12
58°
42°
13
57°
37°
14
61°
41°
15
59°
39°
16
58°
40°
17
59°
44°
18
61°
48°
19
66°
48°
20
67°
47°
21
67°
49°
22
66°
44°
23
62°
48°
24
65°
42°
25
61°
41°
26
62°
49°
27
63°
51°
28
71°
50°
29
66°
48°
30
64°
46°
31
64°
42°
1
63°
44°
2
62°
43°
3
64°
44°
4
64°
44°
5
65°
47°
6
64°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Morriston
Morriston's May 2026 forecast shows daily high temperatures ranging from 45° to 71°, with overnight lows between 28° and 51°. The average high for May is 59° with an average low of 42°. 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.
