S
M
T
W
T
F
S
30
70°
53°
31
77°
50°
1
78°
50°
2
72°
61°
3
81°
60°
4
75°
58°
5
72°
54°
6
70°
47°
7
76°
42°
8
73°
46°
9
69°
45°
10
75°
57°
11
66°
40°
12
76°
58°
13
76°
52°
14
65°
40°
15
71°
56°
16
75°
53°
17
70°
54°
18
67°
48°
19
66°
44°
20
61°
45°
21
63°
45°
22
67°
44°
23
67°
49°
24
68°
43°
25
60°
38°
26
61°
40°
27
61°
47°
28
63°
44°
29
59°
39°
30
61°
46°
1
64°
45°
2
59°
41°
3
64°
45°
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 59° to 76°, with overnight lows between 38° and 58°. The average high for September is 66° with an average low of 46°. 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.
