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Current
Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Cornwall, CT
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Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
31°
21
18°
22
19°
23
12°
24
13°
25
18°
26
22°
27
23°
28
22°
29
22°
30
22°
31
21°
Forecast
Wednesday, May 20, 2026
Day
31°
Feels 31
Wind
18 km/h W
Gust
27 km/h
Humidity
43%
P.O.P
60%
Rain
1-3 mm
Night
12°
Feels 10
Wind
17 km/h NW
Gust
26 km/h
Humidity
80%
P.O.P
40%
Rain
<1 mm
Historical Averages
May 20
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.
May
Average Temperature
High
20°
Feels 20
Low
9°
Feels 7
Average Precipitation
11 Days
Rain amount
79.9mm
Snow amount
0.1cm