S
M
T
W
T
F
S
30
72°
42°
31
82°
36°
1
81°
48°
2
69°
46°
3
65°
52°
4
64°
43°
5
71°
40°
6
76°
42°
7
63°
51°
8
70°
47°
9
79°
41°
10
79°
47°
11
71°
52°
12
72°
48°
13
53°
43°
14
65°
42°
15
71°
42°
16
74°
43°
17
77°
45°
18
78°
45°
19
80°
46°
20
75°
46°
21
76°
45°
22
76°
43°
23
73°
43°
24
70°
38°
25
63°
41°
26
62°
43°
27
63°
36°
28
60°
33°
29
60°
31°
30
61°
31°
1
60°
39°
2
65°
40°
3
65°
37°
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 53° to 80°, with overnight lows between 31° and 52°. The average high for September is 68° with an average low of 41°. 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.
