S
M
T
W
T
F
S
30
76°
64°
31
79°
62°
1
70°
55°
2
76°
57°
3
77°
61°
4
70°
51°
5
69°
52°
6
67°
50°
7
74°
56°
8
75°
56°
9
75°
55°
10
69°
54°
11
72°
54°
12
73°
53°
13
74°
54°
14
74°
55°
15
73°
54°
16
73°
53°
17
69°
53°
18
73°
52°
19
69°
53°
20
71°
53°
21
72°
54°
22
71°
54°
23
72°
51°
24
65°
50°
25
60°
46°
26
63°
49°
27
66°
49°
28
69°
50°
29
69°
50°
30
68°
49°
1
69°
50°
2
68°
50°
3
66°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Morriston
Morriston's September 2026 forecast shows daily high temperatures ranging from 60° to 79°, with overnight lows between 46° and 64°. The average high for September is 71° with an average low of 53°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Morriston. See also: October | November | December.
