S
M
T
W
T
F
S
30
65°
52°
31
64°
53°
1
64°
53°
2
65°
52°
3
64°
51°
4
64°
50°
5
65°
52°
6
65°
48°
7
64°
52°
8
65°
51°
9
67°
52°
10
67°
52°
11
63°
53°
12
62°
49°
13
66°
51°
14
66°
48°
15
65°
47°
16
61°
51°
17
64°
49°
18
65°
49°
19
65°
53°
20
64°
53°
21
65°
52°
22
65°
52°
23
62°
51°
24
63°
50°
25
62°
51°
26
61°
49°
27
62°
51°
28
63°
49°
29
63°
48°
30
61°
49°
1
Hist. Avg.
59°
46°
2
Hist. Avg.
59°
46°
3
Hist. Avg.
58°
46°
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 67°, with overnight lows between 47° and 53°. The average high for September is 64° 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.