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Groton weather in August

Weather in Groton: August

Average day temperature: 78.5°F
Average night temperature: 67.1°F
Sea water temperature: 70.7°F
Number of sunny days: 10 days
Day length: 13.1 - 14.4 hours
Number of rainy days: 3 days
Precipitation totals: 1.3 in.

Air temperature in August, °F

Show year:
2024
2023
2022
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3
5
7
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15
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25
27
29
31
0
14
28
42
56
70
84
98
Day temperature   
Night temperature

The highest day temperature during August of 2024 was 82°F. At the same time the lowest night temperature was 55°F. Daily and nightly averages during August were 75.2°F and 65.7°F.

Sea water temperature in Groton in August, °F

Show year:
2024
2023
2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
63
66
69
72
75
78
81

The average sea water temperature in August of 2024 was 69.9°F. The highest and lowest sea temperatures during the month were 72.9°F and 67.3°F.

Sunny, partly cloudy and cloudy days
Sunny days
Partly cloudy days
Cloudy days
32%
39%
29%

Number of sunny, partly cloudy and cloudy days in August is almost equal.

Precipitation total in August, in.

jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
0.3
0.5
0.8
1.0
1.3
1.6
1.8
1.5
1.1
1.4
1.3
1.5
1.3
1.4
1.5
1.3
1.2
1.5
1.1
1.4
1.3
1.3
1.5
1.3
1.4
1.5
1.3
1.2

Precipitation total value in Groton in August is 1.3 in. Other months of the year show relatively similar values.

Wind speed in August, mph
jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
1.7
3.5
5.2
6.9
8.7
10.4
12.1
9.6
9.0
7.7
7.6
6.7
7.4
8.1
9.3
10.0
9.6
10.1
9.6
9.0
7.7
7.6
6.9
6.7
7.4
8.1
9.3
10.0
9.6
10.1

The average wind speed value in August is 6.9 mph It makes August one of the least windy months of the year.

Average sunny hours
jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
1.4
2.9
4.3
5.8
7.2
8.7
10.1
4.9
6.6
6.4
7.3
8.2
8.4
8.0
6.6
6.3
5.4
5.0
4.9
6.6
6.4
7.3
8.0
8.2
8.4
8.0
6.6
6.3
5.4
5.0

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in August is: 8.0.

Best time for vacation in Groton

Sunniest months:
November 16 days
September 14 days
October 13 days
Warmest months:
July 79.9 °F
August 78.5 °F
June 73.3 °F
Warmest sea temp:
August 70.6 °F
July 68.9 °F
September 68.8 °F
Coldest months:
January 36.7 °F
February 38.0 °F
December 41.7 °F
Rainiest months:
July 4 days
November 3 days
January 3 days
Windiest months:
January 10.1 mph
March 10.0 mph
February 9.6 mph

Groton on a weather map

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24 Hours Forecast
Groton
Local time: 00:02
April 07, monday
0300
41°F
S
6 mph
0600
39°F
S
6 mph
0900
37°F
SW
11 mph
1200
37°F
W
9 mph
1500
39°F
SW
8 mph
1800
37°F
SW
4 mph
2100
37°F
SW
4 mph
April 08, tuesday
0000
36°F
SE
3 mph
Units of measurement: °C / °F