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°
74°
16
91°
70°
17
88°
68°
18
89°
69°
19
88°
71°
20
86°
69°
21
89°
69°
22
85°
70°
23
89°
72°
24
87°
69°
25
87°
68°
26
86°
69°
27
88°
69°
28
87°
66°
29
84°
68°
30
84°
69°
1
86°
69°
2
85°
67°
3
85°
68°
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 84° to 92°, with overnight lows between 66° and 74°. The average high for September is 87° 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.
