S
M
T
W
T
F
S
30
92°
71°
31
95°
70°
1
89°
69°
2
93°
68°
3
94°
72°
4
92°
70°
5
91°
63°
6
87°
64°
7
88°
64°
8
89°
64°
9
90°
63°
10
89°
65°
11
91°
66°
12
89°
64°
13
87°
65°
14
85°
65°
15
83°
63°
16
81°
62°
17
80°
62°
18
84°
57°
19
79°
62°
20
80°
61°
21
78°
61°
22
78°
61°
23
79°
60°
24
78°
60°
25
78°
60°
26
79°
60°
27
78°
60°
28
78°
59°
29
77°
58°
30
79°
50°
1
74°
49°
2
75°
49°
3
74°
50°
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 74° to 91°, with overnight lows between 49° and 66°. The average high for September is 82° with an average low of 60°. 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.
