S
M
T
W
T
F
S
30
52°
31°
31
46°
39°
1
44°
32°
2
43°
34°
3
44°
34°
4
41°
32°
5
43°
35°
6
45°
36°
7
46°
36°
8
45°
38°
9
46°
37°
10
46°
37°
11
44°
36°
12
45°
37°
13
47°
35°
14
41°
34°
15
41°
36°
16
46°
39°
17
46°
38°
18
42°
35°
19
37°
34°
20
35°
33°
21
34°
33°
22
34°
33°
23
35°
32°
24
36°
33°
25
36°
33°
26
33°
31°
27
35°
32°
28
35°
35°
29
36°
34°
30
36°
29°
1
34°
33°
2
34°
33°
3
36°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Alpine
Alpine's September 2026 forecast shows daily high temperatures ranging from 33° to 47°, with overnight lows between 29° and 39°. The average high for September is 40° with an average low of 34°. 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 Alpine. See also: October | November | December.
