S
M
T
W
T
F
S
30
67°
51°
31
69°
51°
1
76°
51°
2
81°
50°
3
81°
47°
4
84°
51°
5
82°
50°
6
81°
54°
7
80°
48°
8
82°
50°
9
80°
51°
10
79°
50°
11
78°
47°
12
79°
46°
13
77°
47°
14
78°
45°
15
77°
41°
16
77°
47°
17
76°
47°
18
73°
46°
19
68°
43°
20
65°
38°
21
65°
38°
22
71°
40°
23
74°
45°
24
70°
44°
25
64°
35°
26
62°
33°
27
65°
35°
28
69°
39°
29
70°
37°
30
70°
39°
1
69°
35°
2
67°
36°
3
70°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Eagle County Regional Airport
Eagle County Regional Airport's September 2026 forecast shows daily high temperatures ranging from 62° to 84°, with overnight lows between 33° and 54°. The average high for September is 74° with an average low of 43°. 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 Eagle County Regional Airport. See also: October | November | December.