S
M
T
W
T
F
S
30
87°
72°
31
87°
73°
1
88°
73°
2
87°
72°
3
87°
73°
4
88°
73°
5
87°
72°
6
87°
71°
7
88°
71°
8
86°
70°
9
86°
71°
10
87°
70°
11
90°
70°
12
91°
67°
13
88°
70°
14
89°
69°
15
90°
70°
16
89°
69°
17
90°
69°
18
90°
68°
19
89°
68°
20
90°
69°
21
90°
66°
22
86°
66°
23
86°
68°
24
85°
69°
25
86°
69°
26
86°
68°
27
87°
67°
28
88°
65°
29
88°
65°
30
89°
67°
1
88°
67°
2
86°
66°
3
86°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Crystal River
Crystal River's September 2026 forecast shows daily high temperatures ranging from 85° to 91°, with overnight lows between 62° and 73°. The average high for September is 88° with an average low of 69°. 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.
