S
M
T
W
T
F
S
30
77°
64°
31
87°
71°
1
85°
73°
2
91°
73°
3
92°
69°
4
84°
67°
5
80°
62°
6
78°
55°
7
79°
55°
8
85°
58°
9
88°
69°
10
82°
63°
11
79°
59°
12
74°
63°
13
84°
59°
14
69°
49°
15
84°
51°
16
85°
68°
17
79°
68°
18
75°
59°
19
71°
58°
20
69°
60°
21
60°
51°
22
60°
55°
23
61°
51°
24
68°
41°
25
69°
44°
26
71°
47°
27
70°
48°
28
70°
51°
29
74°
58°
30
73°
60°
1
72°
54°
2
67°
49°
3
73°
55°
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 61° to 74°, with overnight lows between 41° and 60°. The average high for September is 70° 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 Mansfield. See also: October | November | December.