S
M
T
W
T
F
S
30
91°
73°
31
90°
73°
1
88°
72°
2
88°
72°
3
89°
71°
4
88°
69°
5
89°
70°
6
90°
71°
7
91°
72°
8
92°
71°
9
91°
72°
10
91°
71°
11
90°
71°
12
91°
70°
13
91°
71°
14
90°
72°
15
88°
71°
16
89°
71°
17
87°
70°
18
87°
68°
19
86°
70°
20
86°
70°
21
87°
67°
22
87°
69°
23
88°
69°
24
87°
67°
25
88°
66°
26
87°
69°
27
87°
68°
28
88°
69°
29
85°
67°
30
87°
67°
1
Hist. Avg.
86°
66°
2
Hist. Avg.
86°
66°
3
Hist. Avg.
85°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Gainesville
Gainesville's September 2026 forecast shows daily high temperatures ranging from 85° to 92°, with overnight lows between 66° and 73°. The average high for September is 89° with an average low of 70°. 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 Gainesville. See also: October | November | December.
