S
M
T
W
T
F
S
30
90°
49°
31
88°
48°
1
88°
49°
2
87°
49°
3
88°
48°
4
87°
43°
5
85°
43°
6
80°
36°
7
75°
37°
8
75°
46°
9
76°
45°
10
79°
45°
11
84°
38°
12
75°
45°
13
80°
45°
14
83°
44°
15
76°
36°
16
72°
42°
17
74°
44°
18
82°
43°
19
83°
44°
20
83°
43°
21
82°
43°
22
78°
39°
23
69°
39°
24
74°
38°
25
75°
37°
26
70°
35°
27
70°
31°
28
68°
35°
29
68°
34°
30
67°
33°
1
66°
39°
2
69°
40°
3
76°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Newell
Newell's September 2026 forecast shows daily high temperatures ranging from 66° to 90°, with overnight lows between 31° and 49°. The average high for September is 78° with an average low of 41°. 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 Newell. See also: October | November | December.