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Mystic weather in December

Weather in Mystic: December

Average day temperature: 41.8°F
Average night temperature: 36.3°F
Sea water temperature: 49.2°F
Number of sunny days: 12 days
Day length: 9.2 - 9.4 hours
Number of rainy days: 3 days
Precipitation totals: 1.5 in.

Air temperature in December, °F

Show year:
2024
2023
2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
0
9
18
27
36
45
54
63
72
Day temperature   
Night temperature

The highest day temperature during December of 2024 was 56°F. At the same time the lowest night temperature was 14°F. Day and night temperature averages during December were 40.3°F and 35.3°F.

Sea water temperature in Mystic in December, °F

Show year:
2024
2023
2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
39
42
45
48
51
54
57

The average sea water temperature in December of 2024 was 48.4°F. The highest and lowest sea temperatures during the month were 52.9°F and 44.4°F.

Sunny, partly cloudy and cloudy days
Sunny days
Partly cloudy days
Cloudy days
39%
26%
35%

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

Precipitation total in December, 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
1.1
1.4
1.3
1.3
1.5
1.3
1.4
1.5
1.5
1.2
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 Mystic in December is 1.5 in. Other months of the year show relatively similar values.

Wind speed in December, 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
12.2
9.0
7.7
7.6
6.9
6.8
7.5
8.2
9.3
9.7
9.2
10.1
9.6
9.0
7.7
7.6
6.9
6.8
7.5
8.2
9.3
9.7
9.2
10.1

The average wind speed value in December is 9.6 mph It makes December one of the most 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
8.6
10.1
11.5
6.6
6.4
7.4
8.0
8.2
8.4
8.1
6.6
6.4
5.4
5.0
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 December is: 4.9.

Best time for vacation in Mystic

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

Mystic on a weather map

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24 Hours Forecast
Mystic
Local time: 17:31
February 23, sunday
1800
37°F
E
7 mph
2100
36°F
SE
6 mph
February 24, monday
0000
34°F
S
3 mph
0300
34°F
S
2 mph
0600
32°F
S
1 mph
0900
34°F
NW
2 mph
1200
39°F
NE
6 mph
1500
39°F
N
10 mph
Units of measurement: °C / °F