S
M
T
W
T
F
S
30
96°
75°
31
97°
75°
1
98°
74°
2
99°
78°
3
100°
78°
4
93°
77°
5
98°
76°
6
95°
76°
7
98°
76°
8
99°
77°
9
98°
76°
10
95°
77°
11
96°
78°
12
99°
78°
13
97°
78°
14
98°
75°
15
97°
74°
16
95°
73°
17
97°
74°
18
94°
71°
19
92°
69°
20
92°
70°
21
90°
71°
22
91°
68°
23
88°
62°
24
82°
69°
25
90°
69°
26
90°
68°
27
86°
69°
28
87°
69°
29
89°
68°
30
88°
68°
1
88°
67°
2
87°
67°
3
87°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cedar Park
Cedar Park's September 2026 forecast shows daily high temperatures ranging from 82° to 99°, with overnight lows between 62° and 78°. The average high for September is 91° with an average low of 71°. 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 Cedar Park. See also: October | November | December.
