S
M
T
W
T
F
S
30
99°
71°
31
99°
74°
1
100°
71°
2
104°
70°
3
104°
71°
4
96°
75°
5
96°
72°
6
96°
69°
7
99°
70°
8
99°
72°
9
100°
74°
10
98°
72°
11
100°
68°
12
103°
70°
13
97°
73°
14
97°
68°
15
100°
68°
16
98°
64°
17
98°
70°
18
93°
70°
19
96°
71°
20
95°
70°
21
96°
66°
22
95°
67°
23
95°
67°
24
93°
70°
25
94°
68°
26
95°
68°
27
96°
69°
28
95°
65°
29
94°
71°
30
87°
71°
1
85°
67°
2
85°
70°
3
72°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Junction
Junction's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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. See also: October | November | December.