S
M
T
W
T
F
S
30
68°
55°
31
66°
52°
1
66°
52°
2
63°
55°
3
66°
54°
4
63°
54°
5
63°
50°
6
70°
56°
7
62°
50°
8
57°
48°
9
61°
47°
10
62°
54°
11
62°
48°
12
60°
53°
13
61°
51°
14
63°
51°
15
62°
50°
16
60°
51°
17
60°
51°
18
61°
52°
19
58°
51°
20
61°
53°
21
63°
53°
22
63°
52°
23
62°
52°
24
62°
50°
25
59°
46°
26
59°
45°
27
58°
45°
28
60°
48°
29
59°
50°
30
59°
45°
1
58°
48°
2
60°
49°
3
60°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Settle
Settle's September 2026 forecast shows daily high temperatures ranging from 57° to 70°, with overnight lows between 45° and 56°. The average high for September is 61° 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 Settle. See also: October | November | December.
