S
M
T
W
T
F
S
30
87°
69°
31
96°
68°
1
98°
75°
2
100°
76°
3
101°
75°
4
99°
76°
5
98°
74°
6
82°
69°
7
87°
64°
8
86°
60°
9
90°
62°
10
97°
71°
11
98°
74°
12
86°
73°
13
90°
75°
14
91°
70°
15
83°
63°
16
86°
60°
17
93°
69°
18
92°
71°
19
83°
70°
20
85°
69°
21
86°
69°
22
78°
64°
23
75°
62°
24
78°
59°
25
77°
58°
26
80°
56°
27
78°
61°
28
79°
62°
29
78°
60°
30
79°
57°
1
78°
57°
2
80°
62°
3
76°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Morrisville
Morrisville's September 2026 forecast shows daily high temperatures ranging from 75° to 93°, with overnight lows between 56° and 71°. The average high for September is 81° with an average low of 63°. 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 Morrisville. See also: October | November | December.
