S
M
T
W
T
F
S
30
67°
49°
31
66°
51°
1
66°
56°
2
65°
56°
3
65°
55°
4
64°
55°
5
65°
51°
6
64°
52°
7
66°
50°
8
67°
51°
9
68°
49°
10
69°
48°
11
68°
53°
12
65°
52°
13
Hist. Avg.
68°
51°
14
Hist. Avg.
68°
51°
15
Hist. Avg.
68°
51°
16
Hist. Avg.
68°
51°
17
Hist. Avg.
68°
50°
18
Hist. Avg.
68°
50°
19
Hist. Avg.
67°
50°
20
Hist. Avg.
67°
50°
21
Hist. Avg.
67°
50°
22
Hist. Avg.
67°
50°
23
Hist. Avg.
67°
49°
24
Hist. Avg.
66°
49°
25
Hist. Avg.
66°
49°
26
Hist. Avg.
66°
49°
27
Hist. Avg.
66°
49°
28
Hist. Avg.
65°
48°
29
Hist. Avg.
65°
48°
30
Hist. Avg.
65°
48°
1
Hist. Avg.
65°
48°
2
Hist. Avg.
64°
48°
3
Hist. Avg.
64°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Astoria
Astoria's September 2026 forecast shows daily high temperatures ranging from 64° to 69°, with overnight lows between 48° and 56°. The average high for September is 66° with an average low of 52°. 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.
