S
M
T
W
T
F
S
26
88°
62°
27
88°
63°
28
87°
63°
29
88°
62°
30
88°
63°
31
87°
63°
1
87°
62°
2
88°
63°
3
88°
62°
4
87°
63°
5
89°
63°
6
89°
64°
7
88°
63°
8
88°
62°
9
87°
63°
10
88°
63°
11
88°
62°
12
87°
62°
13
88°
61°
14
88°
62°
15
87°
61°
16
87°
62°
17
82°
59°
18
84°
58°
19
85°
56°
20
84°
59°
21
87°
60°
22
89°
61°
23
88°
60°
24
88°
60°
25
87°
59°
26
85°
58°
27
87°
56°
28
85°
56°
29
85°
57°
30
86°
57°
31
88°
60°
1
88°
55°
2
86°
57°
3
82°
57°
4
84°
54°
5
80°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mountainair
Mountainair's August 2026 forecast shows daily high temperatures ranging from 80° to 89°, with overnight lows between 53° and 64°. The average high for August is 87° 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 August weather will actually feel in Mountainair. See also: September | October | November.