S
M
T
W
T
F
S
30
79°
52°
31
79°
59°
1
83°
55°
2
85°
50°
3
79°
50°
4
79°
51°
5
83°
58°
6
85°
56°
7
81°
56°
8
81°
50°
9
78°
50°
10
81°
53°
11
83°
54°
12
83°
55°
13
84°
54°
14
83°
55°
15
83°
56°
16
84°
53°
17
75°
53°
18
82°
50°
19
74°
51°
20
81°
51°
21
81°
52°
22
80°
53°
23
79°
53°
24
78°
52°
25
78°
52°
26
74°
51°
27
77°
51°
28
79°
50°
29
78°
51°
30
78°
50°
1
73°
50°
2
77°
47°
3
73°
43°
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 73° to 85°, with overnight lows between 43° and 59°. The average high for September is 80° with an average low of 52°. 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.
