S
M
T
W
T
F
S
26
93°
51°
27
90°
54°
28
90°
57°
29
91°
59°
30
88°
58°
31
89°
52°
1
90°
49°
2
91°
47°
3
91°
55°
4
93°
53°
5
91°
48°
6
92°
45°
7
91°
46°
8
90°
49°
9
91°
47°
10
90°
58°
11
89°
44°
12
90°
50°
13
86°
52°
14
84°
50°
15
81°
54°
16
84°
46°
17
86°
45°
18
90°
45°
19
86°
49°
20
88°
46°
21
89°
45°
22
91°
51°
23
82°
46°
24
84°
48°
25
82°
46°
26
82°
45°
27
83°
45°
28
84°
48°
29
84°
47°
30
83°
48°
31
85°
45°
1
81°
47°
2
79°
47°
3
80°
46°
4
81°
47°
5
81°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Alamosa
Alamosa's August 2026 forecast shows daily high temperatures ranging from 79° to 91°, with overnight lows between 45° and 51°. The average high for August is 83° with an average low of 47°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Alamosa. See also: September | October | November.