January weather forecast and climate
West Dennis, MA

Weather in January

January, the same as December, is a wintry winter month in West Dennis, Massachusetts, with temperature in the range of an average high of 38.5°F (3.6°C) and an average low of 30.6°F (-0.8°C).

Temperature

January is the coldest month, with an average high-temperature of 38.5°F (3.6°C) and an average low-temperature of 30.6°F (-0.8°C).

Humidity

The average relative humidity in West Dennis is 75%.

Rainfall

In West Dennis, in January, it is raining for 8.4 days, with typically 1.06" (27mm) of accumulated precipitation. Throughout the year, there are 129 rainfall days, and 14.21" (361mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April and December. The month with the most snowfall in West Dennis is January when snow falls for 6.4 days and typically aggregates up to 0.87" (22mm) of snow.

Ocean temperature

In West Dennis, Massachusetts,, the average water temperature is 41.5°F (5.3°C).
Note: Swimming in 41.5°F (5.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The average length of the day in West Dennis is 9.6h.

Sunshine

In West Dennis, the average sunshine in January is 4.8h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in West Dennis, Massachusetts. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 2 interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in West Dennis?

January is the coldest month in West Dennis, Massachusetts, with an average high-temperature of 38.5°F (3.6°C) and an average low-temperature of 30.6°F (-0.8°C).

What is the average humidity in January in West Dennis?

In January, the average relative humidity is 75%.

How much does it rain in West Dennis in January?

In January, in West Dennis, the rain falls for 8.4 days. Throughout January, 1.06" (27mm) of precipitation is accumulated.

What is the snowiest month in West Dennis?

The month with the most snowfall in West Dennis, Massachusetts, is January when snow falls for 6.4 days and typically aggregates up to 0.87" (22mm) of snow.

How many days does it snow in January in West Dennis?

In West Dennis, in January, during 6.4 snowfall days, 0.87" (22mm) of snow is typically accumulated.

What is the water temperature in January in West Dennis?

In West Dennis, the average seawater temperature in January is 41.5°F (5.3°C). Swimming in 41.5°F (5.3°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does West Dennis have in January?

In January, the average length of the day is 9.6h.

How long on average sun shines in January in West Dennis?

In West Dennis, Massachusetts, the average sunshine in January is 4.8h.

When is the lowest UV index in West Dennis?

Months with the lowest UV index in West Dennis, Massachusetts, are January through March, November and December, with an average maximum UV index of 2.

What is the UV index reading in January in West Dennis?

The average daily maximum UV index in January in West Dennis is 2. A UV Index reading of 2, and below, represents a low health risk from the exposure to the Sun's UV rays.

Average temperature in January
West Dennis, MA

Average temperature in January - West Dennis, MA
  • Average high temperature in January: 38.5°F

The warmest month (with the highest average high temperature) is August (72.1°F).
The month with the lowest average high temperature is January (38.5°F).

  • Average low temperature in January: 30.6°F

The month with the highest average low temperature is August (68.5°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

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Average pressure in January
West Dennis, MA

Average pressure in January - West Dennis, MA
  • Average pressure in January: 30"

The month with the highest atmospheric pressure is November (30.06").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in January
West Dennis, MA

Average wind speed in January - West Dennis, MA
  • Average wind speed in January: 16.8mph

The windiest month (with the highest average wind speed) is January (16.8mph).
The calmest months (with the lowest average wind speed) are July and August (10.9mph).

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Average humidity in January
West Dennis, MA

Average humidity in January - West Dennis, MA
  • Average humidity in January: 75%

Months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is November (74%).

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Average rainfall in January
West Dennis, MA

Average rainfall in January - West Dennis, MA
  • Average rainfall in January: 1.06"

The wettest month (with the highest rainfall) is October (1.93").
The driest month (with the least rainfall) is August (0.94").

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Average rainfall days in January
West Dennis, MA

Average rainfall days in January - West Dennis, MA
  • Average rainfall days in January: 8.4 days

The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is February (8.3 days).

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Average snowfall in January
West Dennis, MA

Average snowfall in January - West Dennis, MA
  • Average snowfall in January: 0.87"

The month with the highest snowfall is January (0.87").
Months with the least snowfall are May, June, July, August, September, October and November (0").

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Average snowfall days in January
West Dennis, MA

Average snowfall days in January - West Dennis, MA
  • Average snowfall days in January: 6.4 days

The month with the highest number of snowfall days is January (6.4 days).
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
West Dennis, MA

Average sea temperature in January - West Dennis, MA
  • Average sea temperature in January: 41.5°F

The best month for swimming (with the highest average sea temperature) is August (67.5°F).
The coldest month (with the lowest average sea temperature) is March (39°F).

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Average daylight in January /
Average sunshine in January
West Dennis, MA

Average daylight in January / Average sunshine in January - West Dennis, MA
  • Average daylight in January: 9.6h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in January: 4.8h

The month with the most sunshine is August (Average sunshine: 10.8h).
Months with the least sunshine are February and December (Average sunshine: 4.6).

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Average sunshine days in January
West Dennis, MA

Average sunshine days in January - West Dennis, MA
  • Average sunshine days in January: 15.4 days

The month with the most sunshine days is September (18.6 days).
The month with the least sunshine days is February (14.3 days).

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Average UV index in January
West Dennis, MA

Average UV index in January - West Dennis, MA
  • Average UV index in January: 2

Months with the highest UV index are July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in January
West Dennis, MA

Average cloud cover in January - West Dennis, MA
  • Average cloud cover in January: 48

The month with the most cloud cover is December (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in January
West Dennis, MA

Average visibility in January - West Dennis, MA
  • Average visibility in January: 6mi

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

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