S
M
T
W
T
F
S
30
88°
72°
31
88°
73°
1
89°
72°
2
91°
73°
3
91°
70°
4
89°
70°
5
91°
71°
6
88°
71°
7
88°
70°
8
87°
68°
9
90°
70°
10
90°
68°
11
91°
68°
12
91°
67°
13
90°
70°
14
90°
71°
15
89°
69°
16
89°
71°
17
90°
70°
18
89°
71°
19
88°
70°
20
88°
70°
21
86°
71°
22
88°
70°
23
88°
69°
24
Hist. Avg.
87°
68°
25
Hist. Avg.
87°
68°
26
Hist. Avg.
87°
68°
27
Hist. Avg.
86°
67°
28
Hist. Avg.
86°
67°
29
Hist. Avg.
86°
67°
30
Hist. Avg.
86°
66°
1
Hist. Avg.
86°
66°
2
Hist. Avg.
86°
66°
3
Hist. Avg.
85°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Idylwild
Idylwild's September 2026 forecast shows daily high temperatures ranging from 86° to 91°, with overnight lows between 67° and 73°. The average high for September is 89° with an average low of 70°. 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 Idylwild. See also: October | November | December.
