S
M
T
W
T
F
S
30
94°
73°
31
93°
73°
1
98°
70°
2
98°
72°
3
96°
74°
4
97°
72°
5
98°
73°
6
94°
73°
7
95°
76°
8
99°
70°
9
94°
64°
10
90°
64°
11
88°
64°
12
92°
66°
13
85°
60°
14
84°
61°
15
88°
62°
16
90°
60°
17
79°
52°
18
81°
54°
19
82°
57°
20
83°
58°
21
76°
57°
22
81°
56°
23
82°
56°
24
82°
55°
25
81°
52°
26
69°
44°
27
68°
44°
28
67°
42°
29
70°
47°
30
69°
43°
1
71°
52°
2
67°
47°
3
65°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Johnson
Johnson's September 2026 forecast shows daily high temperatures ranging from 65° to 99°, with overnight lows between 42° and 76°. The average high for September is 82° with an average low of 57°. 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 Johnson. See also: October | November | December.
