S
M
T
W
T
F
S
30
99°
67°
31
100°
74°
1
100°
75°
2
100°
77°
3
98°
76°
4
100°
75°
5
102°
76°
6
104°
78°
7
101°
79°
8
103°
73°
9
100°
77°
10
99°
77°
11
90°
72°
12
99°
72°
13
98°
71°
14
99°
75°
15
98°
75°
16
98°
78°
17
98°
77°
18
98°
71°
19
96°
69°
20
96°
72°
21
92°
69°
22
85°
65°
23
84°
61°
24
82°
58°
25
81°
63°
26
83°
61°
27
81°
60°
28
82°
59°
29
81°
60°
30
82°
62°
1
79°
59°
2
78°
54°
3
81°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lake Ouachita State Park
Lake Ouachita State Park's September 2026 forecast shows daily high temperatures ranging from 78° to 96°, with overnight lows between 54° and 72°. The average high for September is 84° with an average low of 62°. 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 Lake Ouachita State Park. See also: October | November | December.
