S
M
T
W
T
F
S
30
80°
44°
31
77°
50°
1
76°
45°
2
73°
44°
3
62°
49°
4
76°
60°
5
69°
50°
6
65°
50°
7
77°
47°
8
69°
40°
9
63°
35°
10
81°
55°
11
67°
42°
12
74°
41°
13
64°
41°
14
71°
46°
15
71°
41°
16
75°
42°
17
71°
48°
18
75°
44°
19
65°
44°
20
61°
50°
21
66°
43°
22
64°
42°
23
63°
43°
24
64°
45°
25
63°
49°
26
64°
48°
27
64°
44°
28
64°
46°
29
63°
43°
30
62°
43°
1
63°
42°
2
62°
43°
3
61°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Machias
Machias's September 2026 forecast shows daily high temperatures ranging from 61° to 66°, with overnight lows between 42° and 50°. The average high for September is 63° with an average low of 45°. 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 Machias. See also: October | November | December.
