S
M
T
W
T
F
S
30
94°
66°
31
89°
61°
1
87°
56°
2
88°
60°
3
89°
61°
4
84°
59°
5
87°
60°
6
82°
63°
7
88°
61°
8
87°
65°
9
89°
66°
10
91°
65°
11
96°
65°
12
95°
64°
13
94°
65°
14
91°
58°
15
94°
63°
16
94°
63°
17
93°
61°
18
91°
57°
19
86°
57°
20
88°
58°
21
90°
59°
22
91°
60°
23
91°
59°
24
87°
54°
25
81°
50°
26
80°
51°
27
79°
49°
28
80°
50°
29
82°
52°
30
83°
53°
1
81°
51°
2
83°
52°
3
87°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rosamond
Rosamond's September 2026 forecast shows daily high temperatures ranging from 79° to 96°, with overnight lows between 49° and 66°. The average high for September is 88° with an average low of 58°. 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 Rosamond. See also: October | November | December.