S
M
T
W
T
F
S
30
76°
53°
31
68°
62°
1
82°
65°
2
69°
62°
3
81°
62°
4
76°
63°
5
73°
57°
6
72°
52°
7
72°
48°
8
74°
47°
9
81°
67°
10
82°
57°
11
75°
49°
12
73°
62°
13
79°
59°
14
77°
59°
15
75°
59°
16
74°
51°
17
72°
52°
18
70°
49°
19
68°
44°
20
67°
48°
21
65°
45°
22
65°
47°
23
65°
51°
24
66°
50°
25
63°
41°
26
63°
43°
27
69°
50°
28
72°
47°
29
66°
41°
30
67°
49°
1
67°
46°
2
63°
42°
3
66°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mountainhome
Mountainhome's September 2026 forecast shows daily high temperatures ranging from 63° to 82°, with overnight lows between 41° and 67°. The average high for September is 70° with an average low of 50°. 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 Mountainhome. See also: October | November | December.
