S
M
T
W
T
F
S
30
86°
63°
31
87°
61°
1
90°
63°
2
94°
63°
3
95°
64°
4
95°
63°
5
98°
58°
6
93°
61°
7
96°
66°
8
92°
63°
9
87°
57°
10
87°
57°
11
95°
62°
12
89°
59°
13
94°
67°
14
92°
57°
15
75°
57°
16
76°
55°
17
76°
54°
18
76°
53°
19
77°
52°
20
79°
51°
21
79°
53°
22
78°
52°
23
74°
50°
24
78°
46°
25
73°
47°
26
76°
50°
27
79°
51°
28
77°
50°
29
73°
45°
30
76°
47°
1
74°
46°
2
79°
48°
3
79°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Florence
Florence's September 2026 forecast shows daily high temperatures ranging from 73° to 95°, with overnight lows between 45° and 67°. The average high for September is 79° with an average low of 52°. 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 Florence. See also: October | November | December.