S
M
T
W
T
F
S
30
91°
70°
31
91°
70°
1
90°
69°
2
91°
70°
3
91°
70°
4
90°
69°
5
90°
69°
6
89°
70°
7
90°
68°
8
87°
67°
9
86°
67°
10
85°
66°
11
88°
68°
12
89°
68°
13
88°
65°
14
75°
60°
15
74°
65°
16
83°
64°
17
88°
58°
18
78°
52°
19
74°
53°
20
77°
59°
21
79°
61°
22
80°
60°
23
77°
60°
24
77°
59°
25
78°
59°
26
82°
58°
27
82°
47°
28
71°
48°
29
72°
52°
30
75°
58°
1
80°
58°
2
80°
59°
3
82°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Junction City
Junction City's September 2026 forecast shows daily high temperatures ranging from 71° to 91°, with overnight lows between 47° and 70°. The average high for September is 83° with an average low of 62°. 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 Junction City. See also: October | November | December.
