S
M
T
W
T
F
S
30
82°
61°
31
82°
62°
1
85°
61°
2
85°
59°
3
81°
61°
4
83°
60°
5
83°
60°
6
77°
59°
7
78°
59°
8
77°
53°
9
80°
52°
10
77°
58°
11
80°
59°
12
83°
58°
13
81°
58°
14
82°
57°
15
81°
59°
16
83°
58°
17
Hist. Avg.
80°
54°
18
Hist. Avg.
79°
54°
19
Hist. Avg.
79°
53°
20
Hist. Avg.
78°
53°
21
Hist. Avg.
78°
53°
22
Hist. Avg.
78°
52°
23
Hist. Avg.
77°
52°
24
Hist. Avg.
77°
51°
25
Hist. Avg.
76°
51°
26
Hist. Avg.
76°
50°
27
Hist. Avg.
75°
50°
28
Hist. Avg.
75°
50°
29
Hist. Avg.
74°
49°
30
Hist. Avg.
74°
49°
1
Hist. Avg.
74°
48°
2
Hist. Avg.
73°
48°
3
Hist. Avg.
73°
48°
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 77° to 85°, with overnight lows between 52° and 62°. 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.
