S
M
T
W
T
F
S
30
76°
55°
31
83°
58°
1
83°
50°
2
82°
50°
3
75°
49°
4
76°
51°
5
77°
58°
6
80°
56°
7
82°
50°
8
74°
54°
9
73°
56°
10
75°
55°
11
76°
54°
12
77°
52°
13
74°
53°
14
71°
47°
15
72°
47°
16
71°
45°
17
70°
47°
18
70°
52°
19
74°
52°
20
73°
53°
21
74°
50°
22
70°
44°
23
68°
49°
24
67°
52°
25
73°
46°
26
71°
42°
27
Hist. Avg.
69°
49°
28
Hist. Avg.
68°
48°
29
Hist. Avg.
68°
48°
30
Hist. Avg.
68°
48°
1
Hist. Avg.
67°
47°
2
Hist. Avg.
67°
47°
3
Hist. Avg.
67°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Mill River
Mill River's September 2026 forecast shows daily high temperatures ranging from 67° to 83°, with overnight lows between 42° and 58°. The average high for September is 75° 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 Mill River. See also: October | November | December.
