S
M
T
W
T
F
S
30
73°
48°
31
70°
48°
1
69°
49°
2
68°
47°
3
68°
45°
4
69°
46°
5
73°
54°
6
76°
53°
7
73°
52°
8
77°
43°
9
71°
55°
10
76°
52°
11
78°
43°
12
72°
48°
13
76°
54°
14
76°
42°
15
75°
39°
16
65°
39°
17
64°
41°
18
65°
46°
19
69°
47°
20
68°
48°
21
67°
49°
22
69°
48°
23
71°
48°
24
69°
49°
25
66°
48°
26
73°
49°
27
71°
37°
28
72°
34°
29
61°
34°
30
59°
37°
1
58°
34°
2
57°
37°
3
58°
40°
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 57° to 78°, with overnight lows between 34° and 55°. The average high for September is 69° with an average low of 45°. 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.
