January weather forecast
West Dennis, MA

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Weather in January

January, like December, in West Dennis, Massachusetts, is another cold winter month, with an average temperature varying between 38.5°F (3.6°C) and 30.6°F (-0.8°C).

Temperature

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

Humidity

The average relative humidity in January is 75%.

Rainfall

In West Dennis, in January, during 8.4 rainfall days, 1.06" (27mm) of precipitation is typically accumulated. 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. January is the month with the most snowfall. Snow falls for 6.4 days and accumulates 0.87" (22mm) of snow.

Ocean temperature

In West Dennis, in January, the average water temperature is 41.5°F (5.3°C).
Note: Dipping into 41.5°F (5.3°C) below 50°F (10°C) needs protective wear, or you'd face cold shock and breathing issues swiftly. Meanwhile, a slight swim around 55.4°F (13°C) feels cold to the bone.

Daylight

In West Dennis, the average length of the day in January is 9h and 34min.
On the first day of the month, sunrise is at 7:07 am and sunset at 4:20 pm. On the last day of January, sunrise is at 6:53 am and sunset at 4:54 pm EST.

Sunshine

In January, the average sunshine is 4.8h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index, 2 in January, converts into the following recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.

Frequently asked questions

What time of the year is the coldest?

January brings the lowest temperatures, with an average high of 38.5°F (3.6°C) and an average low of 30.6°F (-0.8°C).

How cold is it in January?

West Dennis in January has 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 January, the average relative humidity is 75%.

How many days does it rain 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 is January, when snow falls for 6.4 days and typically aggregates up to 0.87" (22mm) of snow.

How much does it snow in January?

In West Dennis, in January, snow falls for 6.4 days, with typically accumulated 0.87" (22mm) of snow.

What is the ocean temperature in January?

In West Dennis, in January, the average water temperature 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 West Dennis, the average day length in January is 9h and 34min.

When is the sunrise / sunset in January?

In January, on the first day of the month, sunrise is at 7:07 am and sunset at 4:20 pm. On the last day of the month, in West Dennis, sunrise is at 6:53 am and sunset at 4:54 pm EST.

How long on average sun shines in January?

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

What are the months with the lowest UV index?

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

What is the UV index intensity in January?

In January, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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).

Average pressure in January
West Dennis, MA

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

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

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).

Average humidity in January
West Dennis, MA

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

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

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").

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).

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").
The months with the least snowfall are May, June, July, August, September, October and November (0").

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).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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).

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: 9h and 4min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in January: 4h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 4h and 36min).

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).

Average UV index in January
West Dennis, MA

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

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

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).

Average visibility in January
West Dennis, MA

Average visibility in January - West Dennis, MA
  • 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).

West Dennis, Massachusetts, USA

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