Climate data for Sikorsky Airport (1981–2010 normals), ~74 mi (119 km) to the southwest, Snowfall data from NWS Norwich - 12 mi to the north.
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Average high °F (°C) 37.1
(2.8)
39.7
(4.3)
47.2
(8.4)
57.6
(14.2)
67.6
(19.8)
77.0
(25)
82.1
(27.8)
80.8
(27.1)
74.0
(23.3)
63.2
(17.3)
53.1
(11.7)
42.3
(5.7)
60.1
(15.6)
Average low °F (°C) 23.1
(−4.9)
25.2
(−3.8)
31.4
(−0.3)
41.0
(5)
50.5
(10.3)
60.2
(15.7)
66.3
(19.1)
65.6
(18.7)
58.0
(14.4)
46.4
(8)
37.9
(3.3)
28.4
(−2)
44.5
(6.9)
Precipitation inches (mm) 3.10
(78.7)
2.79
(70.9)
4.04
(102.6)
4.13
(104.9)
3.80
(96.5)
3.64
(92.5)
3.46
(87.9)
3.96
(100.6)
3.48
(88.4)
3.64
(92.5)
3.39
(86.1)
3.33
(84.6)
42.75
(1,085.9)
Snowfall inches (cm) 6.8
(17.3)
5.7
(14.5)
3.2
(8.1)
.8
(2)
0
(0)
0
(0)
0
(0)
0
(0)
0
(0)
0
(0)
.2
(0.5)
4.8
(12.2)
21.4
(54.4)
Avg. precipitation days (≥ 0.01 inch) 10.9 9.7 11.3 11.0 11.8 11.1 8.9 8.9 8.2 8.8 10.0 11.1 121.7
Avg. snowy days (≥ 0.1 inch) 5.0 3.6 2.4 .3 0 0 0 0 0 0 .5 3.1 15.0
Source: NOAA[12]