S
M
T
W
T
F
S
30
86°
73°
31
86°
75°
1
89°
73°
2
91°
75°
3
87°
75°
4
88°
75°
5
92°
72°
6
85°
70°
7
85°
70°
8
85°
69°
9
85°
68°
10
84°
72°
11
88°
76°
12
87°
73°
13
87°
75°
14
90°
71°
15
83°
67°
16
84°
69°
17
84°
71°
18
86°
71°
19
82°
73°
20
84°
70°
21
83°
66°
22
77°
63°
23
80°
63°
24
78°
62°
25
78°
66°
26
80°
64°
27
79°
65°
28
83°
66°
29
82°
66°
30
83°
65°
1
79°
62°
2
79°
65°
3
83°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Myrtle Beach State Park
Myrtle Beach State Park's September 2026 forecast shows daily high temperatures ranging from 77° to 90°, with overnight lows between 62° and 75°. The average high for September is 82° with an average low of 67°. 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 Myrtle Beach State Park. See also: October | November | December.
