S
M
T
W
T
F
S
30
90°
72°
31
91°
74°
1
91°
75°
2
90°
76°
3
90°
77°
4
91°
75°
5
90°
77°
6
89°
76°
7
88°
74°
8
91°
73°
9
90°
73°
10
91°
73°
11
91°
74°
12
89°
73°
13
90°
73°
14
90°
77°
15
92°
76°
16
90°
76°
17
89°
73°
18
90°
71°
19
90°
73°
20
89°
72°
21
90°
71°
22
90°
71°
23
N/A
24
82°
71°
25
81°
65°
26
84°
60°
27
N/A
28
87°
64°
29
88°
70°
30
89°
71°
1
90°
70°
2
90°
74°
3
90°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Crystal River
Crystal River's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Crystal River. See also: October | November | December.