S
M
T
W
T
F
S
30
81°
68°
31
88°
73°
1
93°
70°
2
94°
74°
3
90°
74°
4
93°
73°
5
84°
67°
6
83°
60°
7
81°
53°
8
86°
69°
9
82°
59°
10
79°
52°
11
79°
62°
12
78°
56°
13
73°
59°
14
72°
58°
15
73°
53°
16
70°
52°
17
72°
51°
18
69°
50°
19
69°
47°
20
68°
49°
21
72°
48°
22
70°
54°
23
71°
53°
24
76°
54°
25
77°
54°
26
76°
53°
27
75°
54°
28
77°
54°
29
76°
55°
30
74°
54°
1
72°
48°
2
65°
43°
3
61°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Pecatonica
Pecatonica's September 2026 forecast shows daily high temperatures ranging from 61° to 86°, with overnight lows between 39° and 69°. The average high for September is 74° with an average low of 53°. 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 Pecatonica. See also: October | November | December.
