S
M
T
W
T
F
S
30
75°
42°
31
83°
46°
1
85°
54°
2
76°
54°
3
72°
42°
4
70°
48°
5
68°
48°
6
60°
46°
7
75°
43°
8
79°
44°
9
84°
46°
10
81°
51°
11
76°
43°
12
75°
51°
13
56°
46°
14
70°
38°
15
65°
48°
16
77°
46°
17
81°
45°
18
81°
46°
19
82°
48°
20
84°
47°
21
85°
48°
22
79°
58°
23
73°
44°
24
71°
43°
25
67°
44°
26
66°
38°
27
69°
37°
28
72°
36°
29
75°
47°
30
74°
49°
1
75°
49°
2
77°
43°
3
80°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Yakima
Yakima's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Yakima. See also: October | November | December.
