S
M
T
W
T
F
S
30
73°
45°
31
72°
51°
1
76°
45°
2
72°
46°
3
74°
44°
4
78°
49°
5
72°
43°
6
72°
42°
7
73°
42°
8
72°
43°
9
72°
46°
10
74°
45°
11
74°
45°
12
75°
44°
13
77°
43°
14
74°
45°
15
75°
50°
16
79°
50°
17
80°
49°
18
79°
46°
19
76°
41°
20
77°
45°
21
76°
42°
22
74°
42°
23
73°
48°
24
69°
48°
25
67°
41°
26
68°
45°
27
68°
42°
28
66°
43°
29
66°
48°
30
67°
50°
1
66°
48°
2
70°
39°
3
66°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Naselle
Naselle's September 2026 forecast shows daily high temperatures ranging from 66° to 80°, with overnight lows between 38° and 51°. The average high for September is 73° 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 Naselle. See also: October | November | December.