December weather forecast
Chester, MD

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Weather in December

December, the first month of the winter in Chester, is still a chilly month, with an average temperature varying between 36.3°F (2.4°C) and 46.2°F (7.9°C).

Temperature

December is characterized by a slight reduction in average high-temperature, easing from a fresh 54.5°F (12.5°C) in November to a frosty 46.2°F (7.9°C). During December, Chester witnesses a consistent average low-temperature of 36.3°F (2.4°C).

Humidity

In December, the average relative humidity in Chester is 76%.

Rainfall

In Chester, during December, the rain falls for 11.4 days and regularly aggregates up to 2.91" (74mm) of precipitation. In Chester, during the entire year, the rain falls for 159 days and collects up to 32.36" (822mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in Chester. In Chester, during December, snow falls for 1.7 days and regularly aggregates up to 0.31" (8mm) of snow. Throughout the year, in Chester, there are 11.4 snowfall days, and 4.13" (105mm) of snow is accumulated.

Ocean temperature

In December, the average ocean temperature is 51.6°F (10.9°C).
Note: Diving into 51.6°F (10.9°C) is practical below 50°F (10°C), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe. Merely touching waters at 55.4°F (13°C) feels ice-cold.

Daylight

The month with the shortest days in Chester is December, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 7:05 am and sunset at 4:43 pm. On the last day of December, in Chester, sunrise is at 7:23 am and sunset at 4:53 pm EST.

Sunshine

In December, the average sunshine in Chester is 5.2h.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 2 in December transforms into the following instructions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
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Frequently asked questions

What is the usual temperature for Chester in December?

In December, the average high-temperature and low-temperature in Chester, Maryland, are 46.2°F (7.9°C) and 36.3°F (2.4°C) respectively. In August, the average heat index (a.k.a. 'real feel', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is computed to be 89.6°F (32°C).

What is the average humidity in December in Chester?

The average relative humidity in December in Chester is 76%.

How many days does it rain in December in Chester?

In December, in Chester, Maryland, the rain falls for 11.4 days. Throughout December, 2.91" (74mm) of precipitation is accumulated.

How many days does it snow in December in Chester?

In December, in Chester, Maryland, it is snowing for 1.7 days. Throughout December, 0.31" (8mm) of snow is accumulated.

What is the ocean temperature in December in Chester?

In Chester, Maryland, the average seawater temperature in December is 51.6°F (10.9°C). Swimming in 51.6°F (10.9°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Chester?

December has the shortest days of the year, with an average of 9h and 30min of daylight.

How many hours of daylight does Chester have in December?

In December, the average day length in Chester is 9h and 29min.

When are sunrise and sunset in December in Chester?

In December, on the first day of the month, sunrise is at 7:05 am and sunset at 4:43 pm. On the last day of the month, in Chester, sunrise is at 7:23 am and sunset at 4:53 pm EST.

How long on average sun shines in December in Chester?

The average sunshine duration in December in Chester, Maryland, is 5.2h.

What are the months with the lowest UV index in Chester?

The months with the lowest UV index are January and December, with an average maximum UV index of 2.

What is the UV index reading in December in Chester?

In Chester, Maryland, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
54.5°F 12.5°C
46.2°F 7.9°C
40.1°F 4.5°C
Average low temperature
42.8°F 6°C
36.3°F 2.4°C
29.5°F -1.4°C
Average pressure
30.13" 765mmHg
30.11" 765mmHg
30.1" 765mmHg
Average wind speed
9.2mph 14.8km/h
9.2mph 14.8km/h
10mph 16.1km/h
Average max. wind speed
10.1mph 16.3km/h
10.1mph 16.3km/h
10.9mph 17.5km/h
Average wind speed gusts
15.4mph 24.8km/h
15.4mph 24.8km/h
16.5mph 26.6km/h
Average humidity
73%
76%
73%
Average rainfall
2.05" 52mm
2.91" 74mm
2.05" 52mm
Average rainfall days
8.8
11.4
9.3
Average snowfall
0.04" 1mm
0.31" 8mm
1.42" 36mm
Average snowfall days
0.3
1.7
4.2
Average sea temperature
57.9°F 14.4°C
51.7°F 10.9°C
46.7°F 8.2°C
Average daylight
10h 1min
9h 3min
9h 5min
Average sunshine
5h 5min
5h 1min
5h 2min
Average sunshine days
19.4
17.4
18.2
Average UV index
3
2
2
Average cloud cover
36%
45%
43%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in December
Chester, MD

Average temperature in December - Chester, MD
  • Average high temperature in December: 46.2°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (40.1°F).

  • Average low temperature in December: 36.3°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).

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Average pressure in December
Chester, MD

Average pressure in December - Chester, MD
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in December
Chester, MD

Average wind speed in December - Chester, MD
  • Average wind speed in December: 9.2mph

The windiest months (with the highest average wind speed) are February and March (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

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Average humidity in December
Chester, MD

Average humidity in December - Chester, MD
  • Average humidity in December: 76%

The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January and November (73%).

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Average rainfall in December
Chester, MD

Average rainfall in December - Chester, MD
  • Average rainfall in December: 2.91"

The wettest month (with the highest rainfall) is July (3.31").
The driest month (with the least rainfall) is September (1.89").

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Average rainfall days in December
Chester, MD

Average rainfall days in December - Chester, MD
  • Average rainfall days in December: 11.4 days

The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is November (8.8 days).

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Average snowfall in December
Chester, MD

Average snowfall in December - Chester, MD
  • Average snowfall in December: 0.31"

The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Chester, MD

Average snowfall days in December - Chester, MD
  • Average snowfall days in December: 1.7 days

The month with the highest number of snowfall days is January (4.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in December
Chester, MD

Average sea temperature in December - Chester, MD
  • Average sea temperature in December: 51.7°F

The best month for swimming (with the highest average sea temperature) is August (77.8°F).
The coldest month (with the lowest average sea temperature) is February (45.1°F).

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Average daylight in December /
Average sunshine in December
Chester, MD

Average daylight in December / Average sunshine in December - Chester, MD
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

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Average sunshine days in December
Chester, MD

Average sunshine days in December - Chester, MD
  • Average sunshine days in December: 17.4 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (11.1 days).

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Average UV index in December
Chester, MD

Average UV index in December - Chester, MD
  • Average UV index in December: 2

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in December
Chester, MD

Average cloud cover in December - Chester, MD
  • Average cloud cover in December: 45

The months with the most cloud cover are February, March and December (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).

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Average visibility in December
Chester, MD

Average visibility in December - Chester, MD
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Chester, Maryland, USA

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