S
M
T
W
T
F
S
30
79°
63°
31
77°
64°
1
81°
68°
2
84°
70°
3
84°
64°
4
81°
63°
5
73°
63°
6
75°
57°
7
73°
54°
8
77°
59°
9
79°
63°
10
72°
66°
11
75°
59°
12
79°
63°
13
75°
63°
14
69°
48°
15
79°
58°
16
84°
64°
17
80°
66°
18
77°
59°
19
77°
61°
20
80°
61°
21
77°
59°
22
74°
55°
23
70°
53°
24
68°
50°
25
67°
50°
26
71°
51°
27
75°
52°
28
74°
52°
29
73°
52°
30
73°
51°
1
71°
52°
2
73°
51°
3
73°
48°
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 67° to 84°, with overnight lows between 48° and 66°. The average high for September is 74° with an average low of 55°. 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.
