S
M
T
W
T
F
S
30
66°
51°
31
71°
56°
1
74°
59°
2
76°
59°
3
75°
58°
4
66°
48°
5
68°
50°
6
67°
52°
7
72°
53°
8
70°
58°
9
68°
50°
10
68°
49°
11
69°
53°
12
67°
59°
13
66°
50°
14
65°
48°
15
64°
48°
16
65°
49°
17
66°
50°
18
68°
50°
19
73°
53°
20
73°
50°
21
66°
50°
22
66°
51°
23
62°
49°
24
63°
48°
25
61°
44°
26
63°
45°
27
62°
47°
28
63°
54°
29
68°
52°
30
68°
46°
1
Hist. Avg.
63°
49°
2
Hist. Avg.
62°
49°
3
Hist. Avg.
62°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Shoreline
Shoreline's September 2026 forecast shows daily high temperatures ranging from 61° to 76°, with overnight lows between 44° and 59°. The average high for September is 67° 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 Shoreline. See also: October | November | December.
