S
M
T
W
T
F
S
30
89°
54°
31
89°
59°
1
81°
58°
2
85°
60°
3
83°
60°
4
78°
56°
5
81°
55°
6
86°
63°
7
87°
63°
8
87°
62°
9
86°
61°
10
84°
61°
11
82°
61°
12
84°
59°
13
84°
60°
14
80°
52°
15
83°
54°
16
82°
56°
17
83°
56°
18
83°
55°
19
82°
56°
20
82°
55°
21
81°
55°
22
82°
54°
23
81°
54°
24
81°
53°
25
80°
53°
26
75°
52°
27
70°
53°
28
72°
52°
29
70°
51°
30
70°
51°
1
72°
50°
2
72°
49°
3
74°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mountainair
Mountainair's September 2026 forecast shows daily high temperatures ranging from 70° to 87°, with overnight lows between 49° and 63°. The average high for September is 80° with an average low of 56°. 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 Mountainair. See also: October | November | December.
