S
M
T
W
T
F
S
30
84°
50°
31
86°
49°
1
82°
43°
2
78°
40°
3
74°
45°
4
75°
44°
5
79°
46°
6
83°
47°
7
83°
43°
8
71°
40°
9
71°
38°
10
70°
40°
11
72°
39°
12
73°
39°
13
71°
45°
14
71°
46°
15
69°
46°
16
78°
45°
17
73°
39°
18
68°
44°
19
67°
39°
20
69°
36°
21
75°
38°
22
70°
34°
23
68°
34°
24
70°
38°
25
74°
42°
26
75°
41°
27
Hist. Avg.
68°
35°
28
Hist. Avg.
68°
35°
29
Hist. Avg.
67°
34°
30
Hist. Avg.
67°
34°
1
Hist. Avg.
66°
34°
2
Hist. Avg.
66°
33°
3
Hist. Avg.
65°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Deer Park
Deer Park's September 2026 forecast shows daily high temperatures ranging from 67° to 86°, with overnight lows between 34° and 50°. The average high for September is 74° with an average low of 42°. 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.
