Weather in Groton in Summer
| June | July | August | ||||
| Average day temperature: | 73.3°F | 79.9°F | 78.5°F | |||
| Average night temperature: | 61.1°F | 68.3°F | 67.1°F | |||
| Sea water temperature: | 61.3°F | 68.9°F | 70.7°F | |||
| Number of sunny days: | 11 days | 11 days | 10 days | |||
| Day length: | 15.0 - 15.2 h. | 14.4 - 15.1 h. | 13.1 - 14.4 h. | |||
| Number of rainy days: | 3 days | 4 days | 3 days | |||
| Precipitation totals: | 1.3 in. | 1.5 in. | 1.3 in. | |||
Day & Night air temperature, °F
June
July
August
0
13
26
39
52
65
78
91
104
78.5
79.9
73.3
67.1
68.3
61.1
| Day temperature | Night temperature |
Sea water temperature, °F
June
July
August
0
12
24
36
48
60
72
84
70.7
68.9
61.3
Precipitation total, in.
June
July
August
0.0
0.3
0.5
0.8
1.0
1.3
1.6
1.8
1.3
1.5
1.3
Sunny, partly cloudy and cloudy days
June
July
August
0
5
10
15
20
25
30
35
9
11
10
12
9
9
10
11
11
| Cloudy days | Partly cloudy days | Sunny days |
Wind speed, mph
June
July
August
0.0
1.3
2.5
3.8
5.1
6.4
7.6
8.9
6.9
6.7
7.4
Average sunny hours
June
July
August
0
1
2
3
4
5
6
7
8
9
10
8
8.2
8.4
Sunny hours are calculated based on the average daily number of hours while sunlight can reach the ground. It depends on day length and cloudiness during the day.
Best time for vacation in Groton
Groton on a weather map
Leaflet | Tiles © Esri
Places in USA:
Name
°F
24 Hours Forecast
Groton
Local time: 14:22
April 04, friday
1500
54°F
SE
10 mph
10 mph
1800
57°F
SE
9 mph
9 mph
2100
55°F
SE
6 mph
6 mph
April 05, saturday
0000
52°F
S
6 mph
6 mph
0300
50°F
SW
7 mph
7 mph
0600
46°F
W
11 mph
11 mph
0900
43°F
W
14 mph
14 mph
1200
43°F
NW
16 mph
16 mph
