S
M
T
W
T
F
S
30
88°
59°
31
88°
59°
1
87°
58°
2
88°
58°
3
84°
57°
4
83°
58°
5
83°
57°
6
84°
56°
7
85°
57°
8
87°
58°
9
87°
59°
10
86°
59°
11
87°
58°
12
86°
57°
13
85°
58°
14
80°
56°
15
82°
54°
16
81°
55°
17
85°
56°
18
86°
54°
19
85°
53°
20
84°
53°
21
85°
52°
22
83°
50°
23
81°
51°
24
82°
54°
25
83°
55°
26
84°
56°
27
85°
56°
28
86°
55°
29
84°
52°
30
81°
49°
1
79°
48°
2
76°
48°
3
74°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Descanso Junction
Descanso Junction's September 2026 forecast shows daily high temperatures ranging from 74° to 88°, with overnight lows between 46° and 59°. The average high for September is 84° with an average low of 55°. 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 Junction. See also: October | November | December.
