S
M
T
W
T
F
S
30
90°
71°
31
93°
70°
1
96°
72°
2
96°
72°
3
97°
73°
4
97°
73°
5
96°
72°
6
98°
74°
7
94°
72°
8
92°
70°
9
93°
67°
10
94°
68°
11
88°
72°
12
90°
73°
13
92°
70°
14
96°
68°
15
94°
69°
16
92°
70°
17
92°
66°
18
96°
66°
19
96°
70°
20
93°
69°
21
93°
70°
22
91°
68°
23
89°
66°
24
80°
62°
25
82°
58°
26
83°
57°
27
82°
57°
28
85°
61°
29
86°
65°
30
88°
70°
1
82°
65°
2
81°
59°
3
82°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kingston
Kingston's September 2026 forecast shows daily high temperatures ranging from 80° to 89°, with overnight lows between 57° and 70°. The average high for September is 84° with an average low of 62°. 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 Kingston. See also: October | November | December.