S
M
T
W
T
F
S
30
91°
68°
31
90°
67°
1
87°
67°
2
89°
65°
3
91°
65°
4
90°
67°
5
91°
67°
6
92°
68°
7
92°
68°
8
89°
67°
9
86°
67°
10
87°
66°
11
87°
68°
12
88°
69°
13
89°
67°
14
92°
69°
15
91°
68°
16
90°
66°
17
89°
65°
18
87°
68°
19
89°
65°
20
86°
62°
21
91°
67°
22
92°
66°
23
Hist. Avg.
87°
63°
24
Hist. Avg.
87°
63°
25
Hist. Avg.
86°
63°
26
Hist. Avg.
86°
63°
27
Hist. Avg.
86°
63°
28
Hist. Avg.
86°
62°
29
Hist. Avg.
86°
62°
30
Hist. Avg.
86°
62°
1
Hist. Avg.
86°
62°
2
Hist. Avg.
85°
62°
3
Hist. Avg.
85°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Placentia
Placentia's September 2026 forecast shows daily high temperatures ranging from 86° to 92°, with overnight lows between 62° and 69°. The average high for September is 89° with an average low of 67°. 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 Placentia. See also: October | November | December.
