S
M
T
W
T
F
S
30
100°
74°
31
99°
77°
1
101°
77°
2
101°
76°
3
100°
77°
4
100°
76°
5
101°
75°
6
101°
74°
7
99°
75°
8
98°
74°
9
97°
71°
10
91°
66°
11
85°
60°
12
87°
66°
13
88°
67°
14
86°
66°
15
87°
66°
16
87°
65°
17
86°
66°
18
87°
66°
19
86°
65°
20
86°
65°
21
85°
64°
22
85°
64°
23
84°
63°
24
85°
63°
25
84°
62°
26
85°
63°
27
84°
62°
28
84°
62°
29
83°
61°
30
84°
62°
1
83°
61°
2
83°
61°
3
82°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Joplin
Joplin's September 2026 forecast shows daily high temperatures ranging from 82° to 101°, with overnight lows between 60° and 77°. The average high for September is 89° with an average low of 67°. 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 Joplin. See also: October | November | December.
