S
M
T
W
T
F
S
26
95°
73°
27
96°
74°
28
97°
74°
29
97°
73°
30
96°
74°
31
97°
75°
1
96°
73°
2
97°
74°
3
97°
75°
4
96°
74°
5
97°
75°
6
97°
74°
7
96°
72°
8
94°
72°
9
94°
73°
10
96°
74°
11
97°
74°
12
97°
73°
13
96°
73°
14
96°
72°
15
93°
71°
16
91°
71°
17
93°
69°
18
92°
68°
19
91°
68°
20
89°
67°
21
88°
65°
22
87°
60°
23
85°
59°
24
85°
59°
25
84°
60°
26
83°
59°
27
84°
59°
28
84°
64°
29
89°
66°
30
91°
65°
31
92°
65°
1
92°
64°
2
91°
65°
3
92°
65°
4
92°
64°
5
91°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fort Riley
Fort Riley's August 2026 forecast shows daily high temperatures ranging from 83° to 97°, with overnight lows between 59° and 75°. The average high for August is 92° with an average low of 69°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Fort Riley. See also: September | October | November.