S
M
T
W
T
F
S
30
75°
54°
31
75°
55°
1
76°
53°
2
74°
52°
3
75°
53°
4
76°
53°
5
76°
57°
6
74°
55°
7
74°
56°
8
75°
55°
9
73°
50°
10
75°
49°
11
73°
49°
12
74°
52°
13
74°
49°
14
72°
55°
15
78°
57°
16
79°
57°
17
78°
56°
18
78°
47°
19
76°
46°
20
70°
46°
21
69°
52°
22
72°
54°
23
75°
54°
24
74°
53°
25
75°
43°
26
74°
42°
27
66°
42°
28
64°
43°
29
65°
43°
30
65°
41°
1
Hist. Avg.
70°
48°
2
Hist. Avg.
69°
47°
3
Hist. Avg.
69°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Amboy
Amboy's September 2026 forecast shows daily high temperatures ranging from 64° to 79°, with overnight lows between 41° and 57°. The average high for September is 73° with an average low of 51°. 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 Amboy. See also: October | November | December.
