S
M
T
W
T
F
S
30
99°
74°
31
101°
75°
1
101°
75°
2
102°
78°
3
102°
80°
4
101°
78°
5
97°
76°
6
98°
76°
7
96°
77°
8
97°
76°
9
91°
76°
10
96°
74°
11
97°
76°
12
95°
75°
13
92°
74°
14
94°
74°
15
94°
73°
16
92°
74°
17
94°
73°
18
90°
70°
19
92°
74°
20
92°
73°
21
90°
74°
22
91°
73°
23
90°
73°
24
85°
72°
25
84°
72°
26
84°
71°
27
86°
72°
28
85°
72°
29
87°
71°
30
87°
66°
1
83°
64°
2
81°
63°
3
81°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mathis
Mathis's September 2026 forecast shows daily high temperatures ranging from 81° to 98°, with overnight lows between 62° and 77°. The average high for September is 90° with an average low of 72°. 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 Mathis. See also: October | November | December.
