S
M
T
W
T
F
S
30
81°
48°
31
86°
47°
1
86°
50°
2
82°
46°
3
80°
47°
4
80°
48°
5
81°
49°
6
81°
47°
7
80°
48°
8
79°
49°
9
80°
50°
10
80°
53°
11
81°
52°
12
81°
52°
13
83°
54°
14
86°
54°
15
86°
52°
16
86°
51°
17
86°
51°
18
85°
50°
19
85°
51°
20
84°
51°
21
85°
50°
22
85°
51°
23
84°
52°
24
80°
51°
25
76°
51°
26
76°
49°
27
77°
50°
28
78°
51°
29
79°
52°
30
77°
51°
1
81°
49°
2
79°
50°
3
81°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Monte Rosa
Monte Rosa's September 2026 forecast shows daily high temperatures ranging from 76° to 86°, with overnight lows between 46° and 54°. The average high for September is 82° 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 Monte Rosa. See also: October | November | December.
