S
M
T
W
T
F
S
30
90°
73°
31
88°
72°
1
87°
72°
2
88°
70°
3
86°
67°
4
86°
67°
5
85°
66°
6
85°
68°
7
88°
69°
8
88°
69°
9
90°
70°
10
90°
71°
11
90°
65°
12
88°
69°
13
92°
60°
14
86°
59°
15
88°
67°
16
89°
64°
17
89°
67°
18
90°
67°
19
89°
64°
20
82°
59°
21
78°
56°
22
79°
62°
23
78°
60°
24
78°
61°
25
76°
60°
26
75°
60°
27
83°
59°
28
85°
58°
29
82°
56°
30
84°
62°
1
85°
56°
2
85°
50°
3
81°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Hillcrest
Hillcrest's September 2026 forecast shows daily high temperatures ranging from 75° to 92°, with overnight lows between 48° and 73°. The average high for September is 85° with an average low of 64°. 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 Hillcrest. See also: October | November | December.