S
M
T
W
T
F
S
30
80°
55°
31
70°
54°
1
79°
55°
2
80°
53°
3
73°
53°
4
78°
52°
5
79°
54°
6
78°
52°
7
67°
51°
8
72°
50°
9
74°
50°
10
77°
49°
11
67°
49°
12
63°
41°
13
62°
38°
14
67°
44°
15
75°
46°
16
73°
44°
17
74°
48°
18
75°
47°
19
74°
50°
20
76°
47°
21
76°
42°
22
72°
46°
23
73°
47°
24
74°
47°
25
75°
43°
26
71°
41°
27
67°
42°
28
70°
41°
29
69°
41°
30
58°
39°
1
57°
38°
2
55°
40°
3
61°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Yellow Grass
Yellow Grass's September 2026 forecast shows daily high temperatures ranging from 55° to 80°, with overnight lows between 35° and 55°. The average high for September is 71° with an average low of 46°. 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 Yellow Grass. See also: October | November | December.