S
M
T
W
T
F
S
30
87°
64°
31
82°
72°
1
93°
74°
2
77°
72°
3
89°
72°
4
89°
74°
5
84°
70°
6
83°
66°
7
82°
66°
8
85°
64°
9
89°
71°
10
90°
75°
11
81°
69°
12
83°
65°
13
83°
68°
14
76°
53°
15
76°
57°
16
81°
65°
17
84°
67°
18
84°
64°
19
77°
65°
20
73°
61°
21
75°
58°
22
70°
60°
23
71°
59°
24
72°
58°
25
74°
57°
26
75°
55°
27
78°
61°
28
79°
60°
29
79°
58°
30
73°
55°
1
71°
56°
2
72°
59°
3
77°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Garnet Valley
Garnet Valley's September 2026 forecast shows daily high temperatures ranging from 70° to 84°, with overnight lows between 53° and 68°. The average high for September is 76° with an average low of 60°. 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 Garnet Valley. See also: October | November | December.
