S
M
T
W
T
F
S
30
77°
51°
31
74°
49°
1
76°
48°
2
74°
56°
3
65°
58°
4
69°
56°
5
68°
48°
6
70°
50°
7
74°
54°
8
72°
49°
9
75°
55°
10
75°
52°
11
72°
51°
12
70°
51°
13
69°
50°
14
70°
47°
15
68°
51°
16
70°
52°
17
71°
51°
18
64°
47°
19
63°
44°
20
65°
49°
21
71°
50°
22
71°
50°
23
70°
49°
24
70°
49°
25
69°
48°
26
71°
49°
27
69°
48°
28
69°
47°
29
65°
43°
30
58°
41°
1
57°
39°
2
57°
46°
3
61°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mattawamkeag
Mattawamkeag's September 2026 forecast shows daily high temperatures ranging from 57° to 76°, with overnight lows between 39° and 58°. The average high for September is 68° with an average low of 49°. 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 Mattawamkeag. See also: October | November | December.
