S
M
T
W
T
F
S
30
88°
60°
31
91°
62°
1
92°
62°
2
92°
61°
3
87°
62°
4
86°
62°
5
90°
61°
6
92°
62°
7
92°
62°
8
91°
61°
9
91°
58°
10
86°
54°
11
85°
54°
12
85°
55°
13
84°
58°
14
83°
57°
15
87°
56°
16
88°
59°
17
87°
62°
18
90°
63°
19
81°
63°
20
82°
62°
21
88°
61°
22
89°
62°
23
86°
61°
24
87°
62°
25
88°
61°
26
87°
61°
27
87°
60°
28
81°
60°
29
81°
61°
30
82°
61°
1
86°
60°
2
88°
61°
3
87°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Knightsen
Knightsen's September 2026 forecast shows daily high temperatures ranging from 81° to 92°, with overnight lows between 54° and 63°. The average high for September is 87° with an average low of 60°. 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 Knightsen. See also: October | November | December.