S
M
T
W
T
F
S
30
84°
56°
31
78°
67°
1
88°
70°
2
78°
69°
3
88°
71°
4
87°
63°
5
83°
61°
6
78°
58°
7
78°
61°
8
80°
61°
9
82°
62°
10
86°
63°
11
81°
58°
12
80°
60°
13
79°
62°
14
78°
60°
15
77°
57°
16
74°
61°
17
75°
53°
18
73°
52°
19
79°
55°
20
80°
57°
21
79°
55°
22
78°
57°
23
72°
58°
24
77°
54°
25
75°
53°
26
77°
57°
27
76°
56°
28
76°
51°
29
68°
47°
30
70°
50°
1
68°
46°
2
67°
50°
3
65°
48°
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 65° to 88°, with overnight lows between 46° and 71°. The average high for September is 77° with an average low of 57°. 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.
