S
M
T
W
T
F
S
30
76°
41°
31
85°
48°
1
80°
61°
2
77°
52°
3
71°
48°
4
69°
48°
5
70°
50°
6
77°
51°
7
77°
50°
8
80°
55°
9
83°
57°
10
82°
56°
11
77°
54°
12
76°
53°
13
76°
53°
14
78°
54°
15
79°
56°
16
78°
50°
17
71°
50°
18
71°
48°
19
71°
47°
20
72°
54°
21
72°
50°
22
75°
53°
23
72°
46°
24
68°
43°
25
68°
42°
26
69°
47°
27
77°
50°
28
77°
51°
29
78°
50°
30
76°
51°
1
77°
50°
2
77°
50°
3
76°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Soap Lake
Soap Lake's September 2026 forecast shows daily high temperatures ranging from 68° to 83°, with overnight lows between 42° and 57°. The average high for September is 75° 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 Soap Lake. See also: October | November | December.
