S
M
T
W
T
F
S
30
82°
44°
31
80°
45°
1
81°
43°
2
82°
42°
3
81°
45°
4
82°
42°
5
80°
42°
6
80°
44°
7
79°
41°
8
76°
40°
9
75°
37°
10
74°
39°
11
78°
37°
12
79°
39°
13
78°
37°
14
78°
42°
15
78°
40°
16
75°
41°
17
75°
33°
18
73°
31°
19
70°
32°
20
70°
33°
21
72°
35°
22
76°
40°
23
75°
40°
24
70°
38°
25
69°
39°
26
68°
36°
27
68°
33°
28
67°
34°
29
64°
33°
30
73°
35°
1
73°
36°
2
Hist. Avg.
69°
31°
3
Hist. Avg.
68°
30°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Alamosa
Alamosa's September 2026 forecast shows daily high temperatures ranging from 64° to 82°, with overnight lows between 31° and 45°. The average high for September is 75° with an average low of 38°. 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 Alamosa. See also: October | November | December.
