S
M
T
W
T
F
S
30
88°
66°
31
91°
64°
1
90°
61°
2
86°
64°
3
88°
70°
4
91°
70°
5
82°
66°
6
78°
65°
7
78°
67°
8
78°
59°
9
76°
50°
10
77°
59°
11
82°
54°
12
74°
47°
13
67°
52°
14
65°
47°
15
69°
51°
16
75°
52°
17
74°
54°
18
73°
52°
19
70°
46°
20
74°
52°
21
65°
50°
22
70°
51°
23
70°
51°
24
72°
50°
25
70°
50°
26
69°
49°
27
71°
51°
28
71°
51°
29
68°
50°
30
69°
48°
1
61°
42°
2
57°
39°
3
56°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ellsworth
Ellsworth's September 2026 forecast shows daily high temperatures ranging from 56° to 82°, with overnight lows between 36° and 67°. The average high for September is 71° 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 Ellsworth. See also: October | November | December.