S
M
T
W
T
F
S
30
108°
84°
31
105°
80°
1
101°
74°
2
102°
70°
3
99°
68°
4
100°
70°
5
103°
71°
6
91°
77°
7
97°
75°
8
110°
81°
9
109°
83°
10
113°
88°
11
108°
85°
12
108°
80°
13
105°
78°
14
103°
74°
15
100°
77°
16
102°
78°
17
101°
75°
18
105°
75°
19
107°
73°
20
103°
75°
21
101°
73°
22
99°
72°
23
100°
72°
24
99°
73°
25
99°
71°
26
95°
71°
27
99°
72°
28
96°
67°
29
94°
70°
30
94°
71°
1
92°
69°
2
91°
66°
3
91°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cathedral City-Palm Desert
Cathedral City-Palm Desert's September 2026 forecast shows daily high temperatures ranging from 91° to 108°, with overnight lows between 66° and 80°. The average high for September is 99° with an average low of 73°. 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 Cathedral City-Palm Desert. See also: October | November | December.
