S
M
T
W
T
F
S
26
100°
74°
27
100°
80°
28
91°
76°
29
87°
75°
30
88°
76°
31
86°
70°
1
84°
63°
2
87°
66°
3
92°
72°
4
93°
68°
5
88°
66°
6
87°
67°
7
90°
69°
8
98°
74°
9
97°
75°
10
99°
73°
11
100°
73°
12
96°
72°
13
95°
73°
14
92°
72°
15
89°
67°
16
92°
72°
17
94°
74°
18
93°
73°
19
93°
73°
20
92°
72°
21
93°
73°
22
93°
72°
23
92°
71°
24
91°
72°
25
93°
71°
26
89°
69°
27
90°
70°
28
92°
71°
29
92°
69°
30
91°
70°
31
91°
70°
1
90°
69°
2
91°
70°
3
91°
70°
4
90°
69°
5
90°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Junction City
Junction City's August 2026 forecast shows daily high temperatures ranging from 87° to 100°, with overnight lows between 66° and 75°. The average high for August is 92° with an average low of 71°. 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 Junction City. See also: September | October | November.