S
M
T
W
T
F
S
30
76°
64°
31
78°
67°
1
82°
67°
2
82°
65°
3
81°
62°
4
82°
67°
5
81°
65°
6
79°
60°
7
74°
64°
8
73°
65°
9
76°
59°
10
77°
57°
11
73°
65°
12
76°
60°
13
79°
63°
14
76°
62°
15
71°
63°
16
72°
56°
17
71°
60°
18
Hist. Avg.
74°
59°
19
Hist. Avg.
74°
59°
20
Hist. Avg.
73°
58°
21
Hist. Avg.
73°
58°
22
Hist. Avg.
73°
58°
23
Hist. Avg.
72°
57°
24
Hist. Avg.
72°
57°
25
Hist. Avg.
72°
56°
26
Hist. Avg.
71°
56°
27
Hist. Avg.
71°
56°
28
Hist. Avg.
70°
55°
29
Hist. Avg.
70°
55°
30
Hist. Avg.
70°
54°
1
Hist. Avg.
69°
54°
2
Hist. Avg.
69°
54°
3
Hist. Avg.
69°
53°
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 71° to 82°, with overnight lows between 56° and 67°. The average high for September is 77° with an average low of 63°. 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.
