S
M
T
W
T
F
S
30
86°
56°
31
81°
54°
1
80°
55°
2
80°
57°
3
81°
58°
4
80°
55°
5
83°
54°
6
78°
57°
7
79°
53°
8
79°
53°
9
80°
55°
10
79°
51°
11
78°
51°
12
76°
52°
13
77°
51°
14
76°
57°
15
78°
56°
16
81°
55°
17
82°
54°
18
82°
51°
19
82°
55°
20
Hist. Avg.
77°
52°
21
Hist. Avg.
76°
52°
22
Hist. Avg.
76°
52°
23
Hist. Avg.
75°
51°
24
Hist. Avg.
75°
51°
25
Hist. Avg.
75°
50°
26
Hist. Avg.
74°
50°
27
Hist. Avg.
74°
50°
28
Hist. Avg.
74°
49°
29
Hist. Avg.
73°
49°
30
Hist. Avg.
73°
49°
1
Hist. Avg.
73°
48°
2
Hist. Avg.
72°
48°
3
Hist. Avg.
72°
48°
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 76° to 86°, with overnight lows between 51° and 58°. The average high for September is 80° with an average low of 54°. 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.
