S
M
T
W
T
F
S
30
82°
64°
31
82°
67°
1
81°
63°
2
82°
66°
3
81°
66°
4
80°
65°
5
80°
65°
6
79°
64°
7
79°
64°
8
78°
63°
9
78°
63°
10
77°
62°
11
80°
63°
12
80°
63°
13
79°
64°
14
79°
63°
15
77°
63°
16
78°
62°
17
77°
62°
18
75°
60°
19
74°
52°
20
70°
56°
21
70°
61°
22
71°
52°
23
69°
52°
24
68°
54°
25
70°
58°
26
73°
56°
27
68°
53°
28
67°
52°
29
66°
51°
30
67°
51°
1
67°
57°
2
68°
57°
3
68°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Deer Park
Deer Park's September 2026 forecast shows daily high temperatures ranging from 66° to 82°, with overnight lows between 49° and 67°. The average high for September is 75° 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 Deer Park. See also: October | November | December.
