S
M
T
W
T
F
S
30
86°
63°
31
87°
62°
1
87°
62°
2
85°
63°
3
85°
63°
4
86°
62°
5
85°
63°
6
86°
63°
7
86°
64°
8
87°
63°
9
84°
65°
10
85°
65°
11
87°
64°
12
89°
64°
13
88°
66°
14
89°
68°
15
90°
68°
16
89°
67°
17
90°
66°
18
90°
65°
19
89°
66°
20
89°
67°
21
88°
68°
22
90°
67°
23
90°
66°
24
88°
64°
25
81°
59°
26
79°
60°
27
80°
63°
28
81°
64°
29
84°
61°
30
81°
61°
1
78°
60°
2
79°
62°
3
86°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rosemead
Rosemead's September 2026 forecast shows daily high temperatures ranging from 78° to 90°, with overnight lows between 59° and 68°. The average high for September is 86° with an average low of 64°. 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 Rosemead. See also: October | November | December.
