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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Groton, CT
Content continues below
May
Average Temperature
High
18°
Feels 18
Low
10°
Feels 9
Average Precipitation
12 Days
Rain amount
75.4mm
Snow amount
0cm
Content continues below
Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
15°
7
16°
8
12°
9
12°
10
15°
11
16°
12
13°
13
13°
14
14°
15
15°
16
15°
17
15°
18
14°
19
15°
20
15°
21
22
23
24
25
26
27
28
29
30
31
Forecast
Wednesday, May 6, 2026
Day
15°
Feels 13
Wind
37 km/h S
Gust
56 km/h
Humidity
77%
P.O.P
40%
Rain
1-3 mm
Night
10°
Feels 7
Wind
32 km/h SW
Gust
48 km/h
Humidity
100%
P.O.P
90%
Rain
~5 mm
Historical Averages
May 6
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.