S
M
T
W
T
F
S
30
102°
79°
31
102°
73°
1
102°
72°
2
102°
70°
3
100°
75°
4
100°
71°
5
101°
71°
6
98°
69°
7
102°
72°
8
105°
73°
9
91°
75°
10
88°
69°
11
93°
61°
12
80°
62°
13
78°
62°
14
98°
65°
15
86°
65°
16
90°
65°
17
95°
66°
18
95°
71°
19
98°
69°
20
73°
65°
21
78°
63°
22
75°
57°
23
75°
57°
24
75°
63°
25
73°
65°
26
82°
62°
27
82°
64°
28
80°
65°
29
75°
55°
30
74°
56°
1
75°
57°
2
74°
51°
3
72°
57°
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 72° to 82°, with overnight lows between 51° and 65°. The average high for September is 76° with an average low of 59°. 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.
