S
M
T
W
T
F
S
30
92°
70°
31
87°
64°
1
84°
62°
2
83°
57°
3
82°
55°
4
82°
58°
5
89°
59°
6
77°
66°
7
87°
68°
8
93°
71°
9
98°
71°
10
98°
70°
11
96°
63°
12
92°
62°
13
90°
60°
14
89°
61°
15
92°
61°
16
93°
62°
17
94°
62°
18
92°
60°
19
89°
54°
20
87°
57°
21
83°
56°
22
82°
54°
23
82°
54°
24
83°
55°
25
83°
54°
26
84°
54°
27
81°
53°
28
84°
55°
29
86°
56°
30
84°
55°
1
82°
54°
2
87°
56°
3
87°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Yucaipa
Yucaipa's September 2026 forecast shows daily high temperatures ranging from 77° to 98°, with overnight lows between 53° and 71°. The average high for September is 88° with an average low of 59°. 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 Yucaipa. See also: October | November | December.
