S
M
T
W
T
F
S
30
85°
57°
31
87°
57°
1
87°
55°
2
86°
54°
3
86°
56°
4
85°
52°
5
85°
51°
6
86°
53°
7
85°
51°
8
85°
52°
9
84°
50°
10
83°
50°
11
84°
51°
12
86°
50°
13
87°
51°
14
89°
48°
15
84°
48°
16
82°
49°
17
82°
49°
18
86°
48°
19
86°
51°
20
88°
52°
21
88°
53°
22
90°
55°
23
89°
54°
24
85°
52°
25
80°
49°
26
83°
50°
27
82°
49°
28
84°
50°
29
82°
49°
30
79°
50°
1
78°
49°
2
78°
45°
3
82°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Washington Park
Washington Park's September 2026 forecast shows daily high temperatures ranging from 78° to 90°, with overnight lows between 45° and 57°. The average high for September is 85° with an average low of 51°. 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 Washington Park. See also: October | November | December.
