S
M
T
W
T
F
S
30
83°
57°
31
80°
56°
1
79°
59°
2
78°
60°
3
79°
59°
4
78°
56°
5
78°
56°
6
76°
57°
7
77°
56°
8
77°
56°
9
78°
57°
10
77°
54°
11
77°
54°
12
76°
56°
13
75°
55°
14
75°
60°
15
79°
59°
16
81°
58°
17
82°
59°
18
81°
57°
19
74°
53°
20
80°
51°
21
72°
50°
22
71°
50°
23
Hist. Avg.
76°
53°
24
Hist. Avg.
76°
53°
25
Hist. Avg.
75°
52°
26
Hist. Avg.
75°
52°
27
Hist. Avg.
74°
52°
28
Hist. Avg.
74°
51°
29
Hist. Avg.
73°
51°
30
Hist. Avg.
73°
50°
1
Hist. Avg.
72°
50°
2
Hist. Avg.
72°
50°
3
Hist. Avg.
72°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Peoria
Peoria's September 2026 forecast shows daily high temperatures ranging from 71° to 83°, with overnight lows between 50° and 60°. The average high for September is 78° 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.
