S
M
T
W
T
F
S
30
78°
63°
31
85°
56°
1
83°
50°
2
83°
57°
3
86°
59°
4
79°
64°
5
76°
63°
6
84°
56°
7
80°
58°
8
73°
63°
9
75°
48°
10
76°
40°
11
81°
60°
12
73°
45°
13
65°
36°
14
60°
54°
15
70°
41°
16
64°
40°
17
68°
46°
18
66°
48°
19
67°
44°
20
64°
43°
21
68°
50°
22
66°
50°
23
67°
45°
24
65°
42°
25
68°
50°
26
70°
49°
27
69°
49°
28
68°
48°
29
65°
47°
30
65°
46°
1
60°
45°
2
60°
44°
3
62°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in New Post
New Post's September 2026 forecast shows daily high temperatures ranging from 60° to 81°, with overnight lows between 36° and 60°. The average high for September is 67° with an average low of 46°. 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 New Post. See also: October | November | December.