S
M
T
W
T
F
S
30
91°
74°
31
91°
74°
1
90°
73°
2
90°
73°
3
91°
74°
4
90°
73°
5
91°
72°
6
90°
73°
7
91°
72°
8
89°
73°
9
89°
72°
10
90°
71°
11
90°
73°
12
89°
74°
13
92°
74°
14
89°
75°
15
Hist. Avg.
90°
74°
16
Hist. Avg.
90°
74°
17
Hist. Avg.
90°
74°
18
Hist. Avg.
90°
74°
19
Hist. Avg.
90°
73°
20
Hist. Avg.
90°
73°
21
Hist. Avg.
90°
73°
22
Hist. Avg.
90°
73°
23
Hist. Avg.
90°
73°
24
Hist. Avg.
90°
73°
25
Hist. Avg.
90°
73°
26
Hist. Avg.
89°
72°
27
Hist. Avg.
89°
72°
28
Hist. Avg.
89°
72°
29
Hist. Avg.
89°
72°
30
Hist. Avg.
89°
72°
1
Hist. Avg.
89°
72°
2
Hist. Avg.
89°
71°
3
Hist. Avg.
88°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Clewiston
Clewiston's September 2026 forecast shows daily high temperatures ranging from 89° to 92°, with overnight lows between 71° and 75°. The average high for September is 90° with an average low of 73°. 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 Clewiston. See also: October | November | December.
