S
M
T
W
T
F
S
30
94°
71°
31
96°
72°
1
96°
74°
2
97°
73°
3
98°
74°
4
95°
74°
5
95°
73°
6
99°
74°
7
99°
74°
8
94°
74°
9
95°
72°
10
95°
71°
11
90°
74°
12
95°
73°
13
95°
74°
14
98°
72°
15
97°
70°
16
96°
74°
17
94°
70°
18
97°
66°
19
98°
69°
20
97°
72°
21
97°
73°
22
96°
69°
23
92°
66°
24
85°
64°
25
87°
62°
26
86°
62°
27
88°
60°
28
86°
61°
29
87°
65°
30
82°
62°
1
83°
60°
2
82°
56°
3
82°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Forest
Forest's September 2026 forecast shows daily high temperatures ranging from 82° to 96°, with overnight lows between 56° and 69°. The average high for September is 86° 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 Forest. See also: October | November | December.