S
M
T
W
T
F
S
30
82°
50°
31
90°
45°
1
80°
45°
2
82°
46°
3
80°
52°
4
82°
51°
5
88°
52°
6
88°
51°
7
78°
44°
8
76°
43°
9
77°
43°
10
77°
47°
11
82°
50°
12
81°
50°
13
74°
51°
14
77°
52°
15
75°
49°
16
75°
49°
17
76°
46°
18
74°
49°
19
73°
45°
20
76°
40°
21
77°
39°
22
73°
40°
23
72°
40°
24
74°
44°
25
80°
46°
26
81°
46°
27
Hist. Avg.
75°
42°
28
Hist. Avg.
74°
41°
29
Hist. Avg.
74°
41°
30
Hist. Avg.
73°
41°
1
Hist. Avg.
73°
40°
2
Hist. Avg.
72°
40°
3
Hist. Avg.
72°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Yakima
Yakima's September 2026 forecast shows daily high temperatures ranging from 72° to 90°, with overnight lows between 39° and 52°. The average high for September is 79° with an average low of 47°. 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.
