S
M
T
W
T
F
S
30
73°
48°
31
75°
49°
1
80°
50°
2
76°
47°
3
72°
42°
4
71°
46°
5
73°
45°
6
78°
45°
7
76°
46°
8
78°
48°
9
79°
49°
10
79°
50°
11
80°
49°
12
74°
47°
13
76°
48°
14
75°
46°
15
76°
47°
16
76°
45°
17
75°
41°
18
66°
38°
19
64°
34°
20
65°
42°
21
73°
46°
22
74°
44°
23
Hist. Avg.
69°
38°
24
Hist. Avg.
68°
38°
25
Hist. Avg.
68°
37°
26
Hist. Avg.
67°
37°
27
Hist. Avg.
67°
36°
28
Hist. Avg.
66°
36°
29
Hist. Avg.
66°
36°
30
Hist. Avg.
66°
35°
1
Hist. Avg.
65°
35°
2
Hist. Avg.
65°
35°
3
Hist. Avg.
64°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Alpine
Alpine's September 2026 forecast shows daily high temperatures ranging from 64° to 80°, with overnight lows between 34° and 50°. The average high for September is 74° with an average low of 46°. 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.
