S
M
T
W
T
F
S
30
79°
49°
31
80°
52°
1
82°
56°
2
88°
58°
3
89°
58°
4
90°
57°
5
83°
54°
6
79°
55°
7
84°
53°
8
80°
48°
9
76°
54°
10
78°
53°
11
74°
48°
12
75°
47°
13
73°
46°
14
75°
49°
15
77°
51°
16
83°
52°
17
84°
49°
18
83°
54°
19
84°
53°
20
84°
56°
21
83°
52°
22
82°
54°
23
83°
54°
24
82°
50°
25
82°
53°
26
78°
48°
27
69°
51°
28
72°
50°
29
71°
47°
30
67°
49°
1
70°
52°
2
77°
51°
3
68°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Asotin
Asotin's September 2026 forecast shows daily high temperatures ranging from 67° to 90°, with overnight lows between 42° and 58°. The average high for September is 79° 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 Asotin. See also: October | November | December.
