S
M
T
W
T
F
S
30
74°
49°
31
72°
52°
1
73°
51°
2
72°
52°
3
73°
52°
4
73°
51°
5
71°
52°
6
73°
51°
7
75°
51°
8
72°
50°
9
67°
45°
10
67°
49°
11
72°
50°
12
74°
49°
13
75°
50°
14
74°
49°
15
73°
47°
16
72°
49°
17
71°
48°
18
64°
44°
19
64°
43°
20
65°
44°
21
64°
47°
22
64°
46°
23
63°
43°
24
62°
38°
25
63°
42°
26
68°
46°
27
67°
45°
28
59°
32°
29
59°
34°
30
61°
38°
1
67°
40°
2
68°
42°
3
67°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Happy Jack
Happy Jack's September 2026 forecast shows daily high temperatures ranging from 59° to 75°, with overnight lows between 32° and 52°. The average high for September is 69° 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 Happy Jack. See also: October | November | December.