S
M
T
W
T
F
S
30
88°
69°
31
94°
71°
1
95°
73°
2
94°
74°
3
96°
75°
4
96°
75°
5
94°
72°
6
83°
68°
7
82°
62°
8
90°
63°
9
79°
69°
10
76°
64°
11
82°
62°
12
88°
64°
13
76°
56°
14
78°
57°
15
91°
68°
16
82°
68°
17
91°
71°
18
77°
67°
19
78°
70°
20
74°
63°
21
64°
61°
22
64°
56°
23
67°
57°
24
70°
58°
25
71°
53°
26
71°
57°
27
72°
57°
28
74°
58°
29
74°
58°
30
73°
54°
1
76°
58°
2
72°
49°
3
70°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Peoria
Peoria's September 2026 forecast shows daily high temperatures ranging from 64° to 76°, with overnight lows between 49° and 58°. The average high for September is 71° with an average low of 56°. 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 Peoria. See also: October | November | December.
