S
M
T
W
T
F
S
30
82°
52°
31
83°
51°
1
82°
52°
2
83°
52°
3
83°
47°
4
82°
51°
5
80°
52°
6
82°
53°
7
83°
54°
8
77°
45°
9
74°
50°
10
76°
51°
11
80°
46°
12
79°
43°
13
73°
46°
14
73°
45°
15
72°
43°
16
74°
44°
17
73°
48°
18
72°
44°
19
71°
45°
20
72°
51°
21
73°
46°
22
78°
43°
23
75°
48°
24
69°
48°
25
Hist. Avg.
74°
46°
26
Hist. Avg.
74°
46°
27
Hist. Avg.
73°
45°
28
Hist. Avg.
73°
45°
29
Hist. Avg.
73°
45°
30
Hist. Avg.
72°
45°
1
Hist. Avg.
72°
44°
2
Hist. Avg.
71°
44°
3
Hist. Avg.
71°
44°
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 69° to 83°, with overnight lows between 43° and 54°. The average high for September is 77° with an average low of 48°. 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.
