S
M
T
W
T
F
S
30
82°
54°
31
79°
62°
1
N/A
2
74°
63°
3
80°
63°
4
85°
60°
5
80°
57°
6
74°
54°
7
77°
57°
8
79°
54°
9
78°
60°
10
81°
59°
11
78°
57°
12
77°
57°
13
77°
59°
14
73°
55°
15
74°
52°
16
71°
56°
17
75°
52°
18
70°
48°
19
76°
54°
20
77°
53°
21
74°
51°
22
73°
52°
23
71°
55°
24
74°
50°
25
71°
50°
26
74°
54°
27
74°
54°
28
72°
49°
29
65°
45°
30
66°
47°
1
64°
43°
2
64°
47°
3
63°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Southington
Southington's September 2026 forecast shows daily high temperatures ranging from 63° to 85°, with overnight lows between 43° and 63°. The average high for September is 74° with an average low of 54°. 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 Southington. See also: October | November | December.
