S
M
T
W
T
F
S
30
73°
47°
31
87°
58°
1
67°
56°
2
65°
54°
3
63°
52°
4
71°
51°
5
71°
53°
6
75°
53°
7
73°
52°
8
77°
56°
9
85°
54°
10
81°
58°
11
76°
54°
12
74°
53°
13
77°
55°
14
74°
54°
15
73°
52°
16
75°
54°
17
86°
55°
18
70°
48°
19
70°
45°
20
72°
51°
21
70°
46°
22
71°
49°
23
69°
44°
24
68°
44°
25
68°
43°
26
73°
44°
27
76°
48°
28
77°
48°
29
76°
49°
30
74°
50°
1
75°
51°
2
76°
50°
3
75°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Scappoose
Scappoose's September 2026 forecast shows daily high temperatures ranging from 68° to 86°, with overnight lows between 43° and 58°. The average high for September is 74° with an average low of 50°. 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 Scappoose. See also: October | November | December.
