S
M
T
W
T
F
S
30
86°
56°
31
78°
59°
1
79°
60°
2
79°
63°
3
84°
56°
4
79°
56°
5
78°
61°
6
84°
60°
7
84°
60°
8
83°
59°
9
83°
60°
10
82°
58°
11
80°
59°
12
76°
59°
13
84°
59°
14
82°
59°
15
Hist. Avg.
77°
55°
16
Hist. Avg.
77°
54°
17
Hist. Avg.
77°
54°
18
Hist. Avg.
76°
53°
19
Hist. Avg.
76°
53°
20
Hist. Avg.
75°
53°
21
Hist. Avg.
75°
52°
22
Hist. Avg.
74°
52°
23
Hist. Avg.
74°
51°
24
Hist. Avg.
74°
51°
25
Hist. Avg.
73°
50°
26
Hist. Avg.
73°
50°
27
Hist. Avg.
72°
50°
28
Hist. Avg.
72°
49°
29
Hist. Avg.
71°
49°
30
Hist. Avg.
71°
48°
1
Hist. Avg.
70°
48°
2
Hist. Avg.
70°
48°
3
Hist. Avg.
70°
47°
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 76° to 86°, with overnight lows between 56° and 63°. The average high for September is 81° with an average low of 59°. 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.
