S
M
T
W
T
F
S
30
84°
57°
31
85°
57°
1
86°
54°
2
82°
50°
3
82°
51°
4
81°
53°
5
82°
53°
6
82°
54°
7
83°
52°
8
82°
51°
9
81°
49°
10
81°
51°
11
82°
53°
12
83°
55°
13
84°
52°
14
85°
51°
15
82°
56°
16
82°
56°
17
80°
55°
18
79°
56°
19
80°
55°
20
79°
54°
21
79°
55°
22
82°
55°
23
81°
54°
24
81°
55°
25
84°
55°
26
84°
54°
27
83°
50°
28
81°
50°
29
79°
51°
30
78°
53°
1
80°
54°
2
83°
53°
3
82°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Descanso
Descanso's September 2026 forecast shows daily high temperatures ranging from 78° to 86°, with overnight lows between 49° and 57°. The average high for September is 82° with an average low of 53°. 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 Descanso. See also: October | November | December.