S
M
T
W
T
F
S
30
82°
64°
31
83°
63°
1
78°
63°
2
77°
62°
3
78°
63°
4
78°
63°
5
77°
61°
6
77°
61°
7
81°
60°
8
77°
56°
9
77°
55°
10
76°
60°
11
76°
55°
12
81°
56°
13
80°
61°
14
81°
54°
15
78°
52°
16
73°
53°
17
74°
52°
18
77°
53°
19
79°
53°
20
79°
54°
21
78°
55°
22
79°
58°
23
79°
52°
24
76°
54°
25
78°
51°
26
77°
56°
27
77°
56°
28
76°
55°
29
77°
56°
30
78°
55°
1
76°
55°
2
77°
54°
3
77°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mountain Home
Mountain Home's September 2026 forecast shows daily high temperatures ranging from 73° to 83°, with overnight lows between 51° and 64°. The average high for September is 78° with an average low of 57°. 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 Mountain Home. See also: October | November | December.
