S
M
T
W
T
F
S
30
88°
60°
31
87°
59°
1
88°
60°
2
84°
58°
3
83°
60°
4
85°
63°
5
88°
61°
6
89°
62°
7
88°
62°
8
88°
63°
9
89°
62°
10
89°
63°
11
88°
64°
12
89°
62°
13
88°
60°
14
84°
57°
15
81°
56°
16
81°
56°
17
82°
58°
18
82°
62°
19
87°
58°
20
84°
59°
21
83°
60°
22
86°
61°
23
85°
52°
24
86°
51°
25
78°
50°
26
84°
57°
27
85°
55°
28
Hist. Avg.
80°
53°
29
Hist. Avg.
80°
53°
30
Hist. Avg.
80°
53°
1
Hist. Avg.
80°
52°
2
Hist. Avg.
80°
52°
3
Hist. Avg.
79°
52°
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 78° to 89°, with overnight lows between 50° and 64°. The average high for September is 85° with an average low of 59°. 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.
