S
M
T
W
T
F
S
30
69°
51°
31
75°
50°
1
67°
58°
2
63°
54°
3
64°
50°
4
65°
49°
5
71°
50°
6
72°
56°
7
68°
56°
8
69°
54°
9
68°
57°
10
71°
56°
11
70°
54°
12
68°
56°
13
69°
52°
14
70°
53°
15
65°
53°
16
63°
52°
17
63°
51°
18
64°
48°
19
62°
53°
20
62°
49°
21
63°
46°
22
62°
47°
23
61°
46°
24
61°
45°
25
62°
46°
26
62°
46°
27
65°
52°
28
61°
52°
29
62°
47°
30
65°
51°
1
61°
51°
2
60°
46°
3
60°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Astoria
Astoria's September 2026 forecast shows daily high temperatures ranging from 60° to 72°, with overnight lows between 45° and 58°. The average high for September is 65° 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 Astoria. See also: October | November | December.
