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Stonington weather in January

Weather in Stonington: January

Average day temperature: 36.8°F
Average night temperature: 30.9°F
Sea water temperature: 43.3°F
Number of sunny days: 10 days
Day length: 9.2 - 10.0 hours
Number of rainy days: 3 days
Precipitation totals: 1.2 in.

Air temperature in January, °F

Show year:
2025
2024
2023
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
0
7
14
21
28
35
42
49
56
Day temperature   
Night temperature

The highest day temperature during January of 2025 was 46°F. At the same time the lowest night temperature was 16°F. Day and night temperature averages during January were 34.4°F and 28.6°F.

Sea water temperature in Stonington in January, °F

Show year:
2025
2024
2023
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
34
37
40
43
46
49
52

The average sea water temperature in January of 2025 was 41.5°F. The highest and lowest sea temperatures during the month were 45.0°F and 38.7°F.

Sunny, partly cloudy and cloudy days
Sunny days
Partly cloudy days
Cloudy days
32%
32%
35%

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

Precipitation total in January, 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
1.3
1.5
1.3
1.4
1.5
1.5
1.2
1.5
1.1
1.4
1.3
1.3
1.5
1.3
1.4
1.5
1.5
1.2
1.2

Precipitation total value in Stonington in January is 1.2 in. Other months of the year show relatively similar values.

Wind speed in January, 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
6.9
6.8
7.5
8.2
9.3
9.7
9.1
9.6
9.0
7.7
7.6
6.9
6.8
7.5
8.2
9.3
9.7
9.1
10.1

The average wind speed value in January is 10.1 mph It makes January most windy month 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
8.6
10.1
4.9
6.6
6.4
7.4
8.0
8.2
8.4
8.1
6.6
6.4
5.4
4.9
6.6
6.4
7.4
8.0
8.2
8.4
8.1
6.6
6.4
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 January is: 5.0.

Best time for vacation in Stonington

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 70.1 °F
July 68.6 °F
September 68.2 °F
Coldest months:
January 36.8 °F
February 38.4 °F
December 41.8 °F
Rainiest months:
July 4 days
June 3 days
November 3 days
Windiest months:
January 10.1 mph
March 9.7 mph
December 9.6 mph

Stonington on a weather map

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24 Hours Forecast
Stonington
Local time: 14:33
February 18, tuesday
1500
27°F
E
21 mph
1800
25°F
E
21 mph
2100
21°F
E
20 mph
February 19, wednesday
0000
19°F
E
18 mph
0300
18°F
E
19 mph
0600
16°F
E
18 mph
0900
16°F
E
17 mph
1200
25°F
SE
18 mph
Units of measurement: °C / °F