S
M
T
W
T
F
S
30
85°
54°
31
77°
59°
1
77°
62°
2
78°
53°
3
82°
57°
4
83°
61°
5
85°
58°
6
84°
52°
7
75°
52°
8
75°
51°
9
76°
53°
10
81°
57°
11
81°
53°
12
74°
52°
13
73°
50°
14
75°
57°
15
80°
55°
16
81°
49°
17
74°
48°
18
71°
47°
19
71°
48°
20
72°
50°
21
69°
50°
22
69°
47°
23
70°
51°
24
70°
52°
25
75°
54°
26
76°
54°
27
77°
45°
28
74°
51°
29
72°
53°
30
75°
53°
1
68°
51°
2
69°
47°
3
67°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in New Mansfield
New Mansfield's September 2026 forecast shows daily high temperatures ranging from 67° to 85°, with overnight lows between 43° and 62°. The average high for September is 75° with an average low of 52°. 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 Mansfield. See also: October | November | December.