S
M
T
W
T
F
S
30
90°
56°
31
91°
57°
1
92°
56°
2
92°
56°
3
91°
57°
4
90°
56°
5
95°
58°
6
95°
62°
7
89°
60°
8
89°
60°
9
Hist. Avg.
90°
59°
10
Hist. Avg.
90°
58°
11
Hist. Avg.
90°
58°
12
Hist. Avg.
89°
58°
13
Hist. Avg.
89°
58°
14
Hist. Avg.
89°
58°
15
Hist. Avg.
89°
58°
16
Hist. Avg.
89°
58°
17
Hist. Avg.
88°
58°
18
Hist. Avg.
88°
57°
19
Hist. Avg.
88°
57°
20
Hist. Avg.
88°
57°
21
Hist. Avg.
87°
57°
22
Hist. Avg.
87°
57°
23
Hist. Avg.
87°
57°
24
Hist. Avg.
87°
57°
25
Hist. Avg.
86°
56°
26
Hist. Avg.
86°
56°
27
Hist. Avg.
86°
56°
28
Hist. Avg.
85°
56°
29
Hist. Avg.
85°
56°
30
Hist. Avg.
85°
55°
1
Hist. Avg.
84°
55°
2
Hist. Avg.
84°
55°
3
Hist. Avg.
84°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Yucaipa
Yucaipa's September 2026 forecast shows daily high temperatures ranging from 89° to 95°, with overnight lows between 56° and 62°. The average high for September is 91° 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 Yucaipa. See also: October | November | December.
