S
M
T
W
T
F
S
30
68°
49°
31
73°
55°
1
70°
57°
2
73°
56°
3
71°
51°
4
67°
48°
5
67°
47°
6
68°
51°
7
70°
54°
8
68°
50°
9
65°
47°
10
66°
44°
11
65°
41°
12
62°
43°
13
65°
45°
14
64°
44°
15
62°
43°
16
63°
41°
17
63°
40°
18
64°
42°
19
61°
42°
20
61°
40°
21
62°
40°
22
62°
45°
23
67°
44°
24
64°
41°
25
67°
48°
26
70°
48°
27
70°
45°
28
62°
40°
29
60°
39°
30
60°
37°
1
57°
45°
2
67°
47°
3
69°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in North River
North River's September 2026 forecast shows daily high temperatures ranging from 57° to 73°, with overnight lows between 35° and 57°. The average high for September is 66° 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 North River. See also: October | November | December.