S
M
T
W
T
F
S
30
84°
59°
31
83°
58°
1
84°
56°
2
81°
54°
3
81°
56°
4
82°
58°
5
81°
60°
6
84°
60°
7
88°
55°
8
85°
60°
9
83°
63°
10
83°
64°
11
87°
60°
12
87°
51°
13
80°
61°
14
78°
57°
15
86°
61°
16
77°
55°
17
79°
51°
18
77°
54°
19
78°
60°
20
81°
49°
21
82°
48°
22
74°
48°
23
72°
48°
24
Hist. Avg.
79°
53°
25
Hist. Avg.
78°
52°
26
Hist. Avg.
78°
52°
27
Hist. Avg.
77°
51°
28
Hist. Avg.
77°
51°
29
Hist. Avg.
77°
50°
30
Hist. Avg.
76°
50°
1
Hist. Avg.
76°
50°
2
Hist. Avg.
75°
49°
3
Hist. Avg.
75°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Fort Riley
Fort Riley's September 2026 forecast shows daily high temperatures ranging from 72° to 88°, with overnight lows between 48° and 64°. The average high for September is 81° with an average low of 56°. 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 Fort Riley. See also: October | November | December.
