S
M
T
W
T
F
S
30
75°
56°
31
72°
63°
1
86°
67°
2
77°
64°
3
84°
64°
4
75°
63°
5
70°
57°
6
72°
48°
7
73°
50°
8
79°
61°
9
83°
68°
10
75°
54°
11
70°
47°
12
74°
58°
13
79°
56°
14
74°
54°
15
73°
50°
16
71°
51°
17
71°
52°
18
69°
51°
19
70°
46°
20
75°
53°
21
73°
53°
22
66°
52°
23
67°
52°
24
69°
51°
25
71°
52°
26
73°
49°
27
67°
44°
28
72°
51°
29
73°
52°
30
73°
52°
1
72°
50°
2
71°
49°
3
70°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mansfield
Mansfield's September 2026 forecast shows daily high temperatures ranging from 66° to 83°, with overnight lows between 44° and 68°. The average high for September is 72° 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 Mansfield. See also: October | November | December.