S
M
T
W
T
F
S
30
69°
48°
31
70°
47°
1
70°
47°
2
71°
48°
3
69°
50°
4
73°
51°
5
76°
50°
6
71°
47°
7
68°
46°
8
69°
44°
9
68°
45°
10
69°
50°
11
74°
46°
12
72°
46°
13
72°
48°
14
75°
51°
15
75°
50°
16
72°
46°
17
71°
48°
18
72°
50°
19
72°
46°
20
73°
50°
21
72°
49°
22
70°
47°
23
67°
43°
24
65°
48°
25
67°
46°
26
68°
46°
27
66°
48°
28
68°
50°
29
69°
49°
30
69°
49°
1
65°
47°
2
65°
44°
3
62°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mount Lemmon Ski Valley
Mount Lemmon Ski Valley's September 2026 forecast shows daily high temperatures ranging from 62° to 76°, with overnight lows between 43° and 51°. The average high for September is 70° with an average low of 48°. 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 Mount Lemmon Ski Valley. See also: October | November | December.
