S
M
T
W
T
F
S
30
84°
65°
31
86°
69°
1
89°
69°
2
93°
72°
3
92°
68°
4
84°
67°
5
79°
57°
6
78°
56°
7
79°
57°
8
84°
71°
9
83°
62°
10
73°
50°
11
76°
56°
12
79°
55°
13
81°
56°
14
74°
51°
15
78°
56°
16
78°
54°
17
76°
53°
18
75°
48°
19
76°
55°
20
75°
55°
21
70°
53°
22
67°
52°
23
67°
53°
24
73°
52°
25
75°
53°
26
74°
52°
27
74°
52°
28
75°
53°
29
75°
54°
30
74°
53°
1
74°
49°
2
71°
45°
3
60°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mattawan
Mattawan's September 2026 forecast shows daily high temperatures ranging from 60° to 84°, with overnight lows between 41° and 71°. The average high for September is 75° with an average low of 54°. 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 Mattawan. See also: October | November | December.
