S
M
T
W
T
F
S
30
94°
69°
31
95°
68°
1
95°
69°
2
94°
69°
3
95°
71°
4
92°
68°
5
95°
65°
6
94°
59°
7
87°
60°
8
86°
61°
9
87°
63°
10
90°
66°
11
92°
64°
12
93°
65°
13
91°
68°
14
93°
67°
15
93°
62°
16
90°
63°
17
91°
64°
18
90°
66°
19
92°
64°
20
90°
60°
21
88°
65°
22
85°
65°
23
82°
60°
24
85°
65°
25
85°
62°
26
87°
59°
27
84°
60°
28
84°
62°
29
85°
58°
30
82°
62°
1
82°
66°
2
89°
64°
3
83°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in West Covina
West Covina's September 2026 forecast shows daily high temperatures ranging from 82° to 95°, with overnight lows between 58° and 71°. The average high for September is 89° 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 West Covina. See also: October | November | December.
