S
M
T
W
T
F
S
30
95°
56°
31
92°
59°
1
91°
48°
2
89°
41°
3
85°
47°
4
85°
48°
5
92°
39°
6
85°
67°
7
95°
67°
8
100°
42°
9
99°
66°
10
100°
65°
11
98°
61°
12
97°
59°
13
91°
55°
14
90°
49°
15
88°
48°
16
84°
45°
17
83°
50°
18
84°
47°
19
86°
38°
20
89°
44°
21
78°
55°
22
78°
56°
23
86°
58°
24
85°
55°
25
84°
55°
26
87°
54°
27
81°
55°
28
80°
54°
29
85°
54°
30
84°
53°
1
79°
53°
2
77°
49°
3
75°
52°
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 75° to 87°, with overnight lows between 49° and 58°. The average high for September is 82° with an average low of 54°. 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.
