S
M
T
W
T
F
S
30
93°
74°
31
95°
74°
1
95°
76°
2
94°
73°
3
93°
73°
4
93°
74°
5
92°
75°
6
90°
76°
7
90°
74°
8
92°
75°
9
91°
76°
10
92°
75°
11
91°
74°
12
92°
74°
13
92°
73°
14
90°
74°
15
89°
74°
16
87°
73°
17
87°
73°
18
88°
72°
19
89°
73°
20
90°
72°
21
88°
72°
22
90°
71°
23
87°
72°
24
89°
72°
25
90°
71°
26
89°
70°
27
90°
71°
28
88°
69°
29
87°
68°
30
88°
68°
1
87°
69°
2
88°
69°
3
84°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in South Park
South Park's September 2026 forecast shows daily high temperatures ranging from 84° to 95°, with overnight lows between 65° and 76°. The average high for September is 90° with an average low of 72°. 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 South Park. See also: October | November | December.
