S
M
T
W
T
F
S
30
99°
71°
31
100°
73°
1
98°
75°
2
99°
77°
3
99°
76°
4
99°
74°
5
101°
75°
6
101°
73°
7
97°
76°
8
99°
76°
9
100°
72°
10
83°
67°
11
90°
70°
12
88°
72°
13
94°
71°
14
93°
69°
15
82°
61°
16
81°
62°
17
80°
62°
18
76°
56°
19
75°
57°
20
76°
56°
21
80°
67°
22
84°
63°
23
85°
64°
24
85°
64°
25
84°
63°
26
83°
63°
27
83°
62°
28
82°
63°
29
83°
62°
30
80°
59°
1
78°
52°
2
69°
48°
3
69°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Springfield
Springfield's September 2026 forecast shows daily high temperatures ranging from 69° to 100°, with overnight lows between 48° and 76°. The average high for September is 83° with an average low of 63°. 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 Springfield. See also: October | November | December.
