S
M
T
W
T
F
S
30
68°
42°
31
77°
29°
1
70°
45°
2
72°
43°
3
71°
41°
4
77°
34°
5
79°
40°
6
79°
36°
7
63°
36°
8
70°
29°
9
72°
30°
10
76°
30°
11
74°
50°
12
76°
36°
13
77°
38°
14
59°
33°
15
71°
24°
16
74°
34°
17
59°
43°
18
58°
44°
19
62°
43°
20
57°
37°
21
68°
32°
22
N/A
23
65°
38°
24
71°
34°
25
75°
32°
26
69°
40°
27
73°
42°
28
66°
34°
29
68°
33°
30
71°
32°
1
67°
34°
2
64°
31°
3
63°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in South Park
South Park's September 2026 forecast shows daily high temperatures ranging from 63° to 73°, with overnight lows between 29° and 42°. The average high for September is 68° with an average low of 34°. 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.
