S
M
T
W
T
F
S
30
97°
71°
31
97°
72°
1
98°
72°
2
97°
70°
3
95°
70°
4
91°
69°
5
93°
71°
6
95°
71°
7
97°
70°
8
97°
71°
9
96°
71°
10
96°
70°
11
95°
70°
12
95°
69°
13
94°
67°
14
88°
64°
15
87°
65°
16
89°
65°
17
92°
68°
18
91°
67°
19
86°
67°
20
88°
68°
21
93°
68°
22
92°
67°
23
91°
61°
24
92°
60°
25
84°
59°
26
85°
58°
27
85°
58°
28
Hist. Avg.
85°
61°
29
Hist. Avg.
85°
60°
30
Hist. Avg.
85°
60°
1
Hist. Avg.
84°
60°
2
Hist. Avg.
84°
59°
3
Hist. Avg.
84°
59°
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 84° to 98°, with overnight lows between 58° and 72°. The average high for September is 92° with an average low of 67°. 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.
