S
M
T
W
T
F
S
30
73°
50°
31
75°
56°
1
72°
57°
2
79°
50°
3
73°
47°
4
70°
47°
5
69°
48°
6
69°
51°
7
75°
54°
8
77°
56°
9
78°
55°
10
77°
49°
11
70°
52°
12
70°
50°
13
73°
46°
14
68°
46°
15
68°
45°
16
67°
44°
17
69°
52°
18
73°
42°
19
67°
46°
20
67°
42°
21
68°
46°
22
66°
50°
23
73°
51°
24
74°
50°
25
72°
50°
26
71°
51°
27
72°
50°
28
74°
46°
29
71°
48°
30
70°
50°
1
72°
46°
2
72°
39°
3
69°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Erin
Erin's September 2026 forecast shows daily high temperatures ranging from 66° to 79°, with overnight lows between 37° and 57°. The average high for September is 72° with an average low of 49°. 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 Erin. See also: October | November | December.
