S
M
T
W
T
F
S
30
90°
56°
31
81°
59°
1
79°
58°
2
79°
59°
3
73°
61°
4
77°
54°
5
82°
48°
6
86°
54°
7
88°
46°
8
95°
52°
9
99°
59°
10
104°
68°
11
92°
62°
12
88°
54°
13
83°
53°
14
87°
56°
15
89°
56°
16
88°
57°
17
89°
58°
18
88°
59°
19
87°
57°
20
88°
60°
21
89°
61°
22
89°
62°
23
92°
63°
24
87°
58°
25
80°
55°
26
84°
60°
27
80°
56°
28
81°
54°
29
83°
57°
30
87°
60°
1
88°
60°
2
88°
59°
3
87°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rocklin
Rocklin's September 2026 forecast shows daily high temperatures ranging from 80° to 92°, with overnight lows between 53° and 63°. The average high for September is 87° 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 Rocklin. See also: October | November | December.
