S
M
T
W
T
F
S
30
85°
64°
31
90°
67°
1
89°
65°
2
89°
65°
3
88°
67°
4
90°
67°
5
89°
68°
6
88°
67°
7
88°
66°
8
83°
66°
9
82°
65°
10
81°
66°
11
87°
65°
12
86°
65°
13
87°
64°
14
86°
65°
15
86°
64°
16
83°
63°
17
80°
57°
18
79°
61°
19
84°
56°
20
77°
54°
21
76°
55°
22
75°
55°
23
76°
60°
24
82°
60°
25
83°
59°
26
83°
59°
27
82°
60°
28
81°
57°
29
80°
56°
30
80°
56°
1
78°
54°
2
80°
58°
3
73°
50°
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 90°, with overnight lows between 50° and 68°. The average high for September is 83° with an average low of 61°. 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.
