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 fluctuating between 36.3°F and 46.2°F.

Temperature

December is marked by a subtle drop in average high-temperatures, transitioning from a cool 54.5°F in November to a chilly 46.2°F. Throughout December, the average low-temperature in Chester, Maryland, dips to a wintry 36.3°F.

Humidity

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

Rainfall

In December, the rain falls for 11.4 days. Throughout December, 2.91" of precipitation is accumulated. Throughout the year, there are 159 rainfall days, and 32.36" of precipitation is accumulated.

Snowfall

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

Ocean temperature

In Chester, in December, the average water temperature is 51.6°F.
Note: Staying in 51.6°F waters for just a few moments at 55.4°F can be harrowing, and below 50°F poses breathing and cold shock risks, depending on individual tolerance.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year in Chester.
On the first day of the month, sunrise is at 7:04 am and sunset at 4:43 pm. On the last day of December, sunrise is at 7:23 am and sunset at 4:52 pm EST.

Sunshine

The average sunshine in December is 5.2h.

UV index

The months with the lowest UV index in Chester, Maryland, are January and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: During December, 2 as the daily maximum UV index converts into the following advice:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. To guard against the harmful effects of the Sun, minimize exposure during midday. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
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FAQ

What are December temperatures in Chester?

In Chester, 46.2°F is the average high-temperature and 36.3°F is the average low-temperature during December. In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 89.6°F.

What is the average humidity in December in Chester?

In December, the average relative humidity is 76%.

How many days does it rain in December in Chester?

In Chester, in December, it is raining for 11.4 days, with typically 2.91" of accumulated precipitation.

How many days does it snow in December in Chester?

In Chester, Maryland, in December, snow falls for 1.7 days, with typically accumulated 0.31" of snow.

What is the water temperature in December in Chester?

In Chester, in December, the average water temperature is 51.6°F. Swimming in 51.6°F is considered dangerous. Unprotected immersion in temperatures below 50°F 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 Chester, Maryland, the average day length in December is 9h and 29min.

When is the sunrise / sunset in December in Chester?

In December, on the first day of the month, sunrise is at 7:04 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:52 pm EST.

How many hours of sunshine does Chester have in December?

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

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

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

How high is the UV index in December in Chester?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
54.5°F
46.2°F
40.1°F
Average low temperature
42.8°F
36.3°F
29.5°F
Average pressure
30.13"Hg
30.11"Hg
30.1"Hg
Average wind speed
9.2mph
9.2mph
10mph
Average max. wind speed
10.1mph
10.1mph
10.9mph
Average wind speed gusts
15.4mph
15.4mph
16.5mph
Average humidity
73%
76%
73%
Average rainfall
2.05"
2.91"
2.05"
Average rainfall days
8.8
11.4
9.3
Average snowfall
0.04"
0.31"
1.42"
Average snowfall days
0.3
1.7
4.2
Average sea temperature
57.9°F
51.7°F
46.7°F
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
6mi
6mi

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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