January weather forecast
Chester, MD

Weather in January

January, the same as December, is a wintry winter month in Chester, Maryland, with an average temperature fluctuating between 29.5°F (-1.4°C) and 40.1°F (4.5°C).

Temperature

January is the coldest month, with an average high-temperature of 40.1°F (4.5°C) and an average low-temperature of 29.5°F (-1.4°C).

Humidity

The months with the lowest humidity are January and November, with an average relative humidity of 73%.

Rainfall

In January, in Chester, the rain falls for 9.3 days. Throughout January, 2.05" (52mm) of precipitation is accumulated. In Chester, Maryland, 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. January is the month with the most snowfall. Snow falls for 4.2 days and accumulates 1.42" (36mm) of snow.

Ocean temperature

In Chester, Maryland, the average water temperature is 46.8°F (8.2°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

The average length of the day in January is 9h and 48min.
On the first day of the month, sunrise is at 7:23 am and sunset at 4:53 pm. On the last day of January, sunrise is at 7:12 am and sunset at 5:25 pm EST.

Sunshine

In January, the average sunshine in Chester is 5.3h.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In January, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Chester?

The coldest month is January, with an average high-temperature of 40.1°F (4.5°C) and an average low-temperature of 29.5°F (-1.4°C).

What are the least humid months in Chester?

January and November, with an average relative humidity of 73%, are the least humid months in Chester.

What is the average humidity in January in Chester?

In January, the average relative humidity is 73%.

How many days does it rain in January in Chester?

In Chester, in January, during 9.3 rainfall days, 2.05" (52mm) of precipitation is typically accumulated.

What is the snowiest month in Chester?

The month with the most snowfall in Chester is January, when snow falls for 4.2 days and typically aggregates up to 1.42" (36mm) of snow.

How many days does it snow in January in Chester?

In Chester, Maryland, in January, during 4.2 snowfall days, 1.42" (36mm) of snow is typically accumulated.

What is the water temperature in January in Chester?

In Chester, the average seawater temperature in January is 46.8°F (8.2°C). Swimming in 46.8°F (8.2°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in January in Chester?

In Chester, the average day length in January is 9h and 48min.

When is the sunrise / sunset in January in Chester?

In January, on the first day of the month, sunrise is at 7:23 am and sunset at 4:53 pm. On the last day of the month, in Chester, sunrise is at 7:12 am and sunset at 5:25 pm EST.

How long on average sun shines in January in Chester?

In Chester, Maryland, the average sunshine duration in January is 5.3h.

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.

What is the UV index reading in January in Chester?

In January, the average daily maximum UV index in Chester is 2. A UV Index value of 2, and less, symbolizes a low health threat from unsafe exposure to Sun's UV rays.

Average temperature in January
Chester, MD

Average temperature in January - Chester, MD
  • Average high temperature in January: 40.1°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 January: 29.5°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 January
Chester, MD

Average pressure in January - Chester, MD
  • Average pressure in January: 30.1"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 January
Chester, MD

Average wind speed in January - Chester, MD
  • Average wind speed in January: 10mph

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 January
Chester, MD

Average humidity in January - Chester, MD
  • Average humidity in January: 73%

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 January
Chester, MD

Average rainfall in January - Chester, MD
  • Average rainfall in January: 2.05"

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 January
Chester, MD

Average rainfall days in January - Chester, MD
  • Average rainfall days in January: 9.3 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 January
Chester, MD

Average snowfall in January - Chester, MD
  • Average snowfall in January: 1.42"

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 January
Chester, MD

Average snowfall days in January - Chester, MD
  • Average snowfall days in January: 4.2 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 January
Chester, MD

Average sea temperature in January - Chester, MD
  • Average sea temperature in January: 46.7°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 January /
Average sunshine in January
Chester, MD

Average daylight in January / Average sunshine in January - Chester, MD
  • Average daylight in January: 9h and 48min

The month with the longest days is June (Average daylight: 14h and 52min).
The month with the shortest days is December (Average daylight: 9h and 29min).

  • Average sunshine in January: 5.3h

The month with the most sunshine is July (Average sunshine: 10.9h).
The month with the least sunshine is February (Average sunshine: 5h).

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Average sunshine days in January
Chester, MD

Average sunshine days in January - Chester, MD
  • Average sunshine days in January: 18.2 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 January
Chester, MD

Average UV index in January - Chester, MD
  • Average UV index in January: 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 January
Chester, MD

Average cloud cover in January - Chester, MD
  • Average cloud cover in January: 43

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 January
Chester, MD

Average visibility in January - Chester, MD
  • Average visibility in January: 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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