S
M
T
W
T
F
S
30
87°
64°
31
85°
68°
1
89°
71°
2
93°
70°
3
93°
70°
4
84°
67°
5
78°
60°
6
80°
62°
7
79°
59°
8
74°
57°
9
75°
58°
10
79°
59°
11
75°
58°
12
75°
55°
13
74°
57°
14
76°
55°
15
79°
60°
16
74°
59°
17
76°
56°
18
72°
50°
19
75°
55°
20
79°
59°
21
80°
59°
22
80°
58°
23
79°
58°
24
80°
57°
25
78°
56°
26
77°
55°
27
78°
56°
28
78°
57°
29
77°
55°
30
76°
52°
1
74°
52°
2
75°
51°
3
76°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Morgantown
Morgantown's September 2026 forecast shows daily high temperatures ranging from 72° to 93°, with overnight lows between 50° and 71°. The average high for September is 78° with an average low of 58°. 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 Morgantown. See also: October | November | December.