S
M
T
W
T
F
S
30
85°
66°
31
84°
64°
1
83°
63°
2
83°
63°
3
82°
62°
4
85°
64°
5
84°
64°
6
84°
64°
7
84°
59°
8
Hist. Avg.
77°
58°
9
Hist. Avg.
76°
57°
10
Hist. Avg.
76°
57°
11
Hist. Avg.
76°
57°
12
Hist. Avg.
76°
56°
13
Hist. Avg.
75°
56°
14
Hist. Avg.
75°
56°
15
Hist. Avg.
75°
55°
16
Hist. Avg.
74°
55°
17
Hist. Avg.
74°
55°
18
Hist. Avg.
74°
54°
19
Hist. Avg.
74°
54°
20
Hist. Avg.
73°
54°
21
Hist. Avg.
73°
53°
22
Hist. Avg.
72°
53°
23
Hist. Avg.
72°
53°
24
Hist. Avg.
72°
52°
25
Hist. Avg.
71°
52°
26
Hist. Avg.
71°
52°
27
Hist. Avg.
71°
51°
28
Hist. Avg.
70°
51°
29
Hist. Avg.
70°
50°
30
Hist. Avg.
70°
50°
1
Hist. Avg.
69°
50°
2
Hist. Avg.
69°
49°
3
Hist. Avg.
69°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Alta
Alta's September 2026 forecast shows daily high temperatures ranging from 82° to 85°, with overnight lows between 59° and 66°. The average high for September is 84° with an average low of 63°. 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 Alta. See also: October | November | December.
