S
M
T
W
T
F
S
30
73°
51°
31
74°
58°
1
78°
59°
2
73°
60°
3
80°
60°
4
81°
53°
5
81°
55°
6
74°
49°
7
71°
50°
8
75°
56°
9
77°
54°
10
78°
55°
11
75°
50°
12
73°
56°
13
74°
54°
14
79°
49°
15
70°
54°
16
68°
53°
17
67°
54°
18
68°
47°
19
74°
45°
20
68°
51°
21
71°
44°
22
69°
47°
23
70°
44°
24
73°
48°
25
73°
51°
26
72°
50°
27
71°
53°
28
72°
49°
29
72°
42°
30
64°
48°
1
70°
49°
2
73°
44°
3
70°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Pymatuning South
Pymatuning South's September 2026 forecast shows daily high temperatures ranging from 64° to 81°, with overnight lows between 41° and 60°. The average high for September is 73° with an average low of 51°. 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 Pymatuning South. See also: October | November | December.