S
M
T
W
T
F
S
31
79°
54°
1
79°
50°
2
88°
48°
3
86°
52°
4
88°
55°
5
66°
46°
6
79°
39°
7
81°
54°
8
91°
54°
9
90°
48°
10
86°
54°
11
93°
61°
12
95°
63°
13
86°
61°
14
73°
52°
15
90°
52°
16
90°
57°
17
73°
54°
18
73°
50°
19
81°
48°
20
81°
52°
21
82°
54°
22
84°
50°
23
59°
55°
24
73°
50°
25
81°
45°
26
86°
46°
27
79°
50°
28
88°
50°
29
86°
50°
30
82°
50°
1
82°
54°
2
88°
46°
3
91°
52°
4
88°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Idalia
Idalia's September 2025 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 Idalia. See also: October | November | December.