January weather forecast and climate
Harwich Port, MA

Weather in January

January, like December, in Harwich Port, Massachusetts, is a wintry winter month, with average temperature ranging between min 31.6°F (-0.2°C) and max 39°F (3.9°C).

Temperature

The coldest months are January and February, with an average high-temperature of 39°F (3.9°C).

Humidity

In Harwich Port, the average relative humidity in January is 75%.

Rainfall

In January, in Harwich Port, the rain falls for 9.5 days. Throughout January, 1.69" (43mm) of precipitation is accumulated. In Harwich Port, during the entire year, the rain falls for 142.4 days and collects up to 22.09" (561mm) of precipitation.

Snowfall

Months with snowfall in Harwich Port are January through April, November and December. In Harwich Port, in January, snow falls for 6 days, with typically accumulated 1.34" (34mm) of snow. In Harwich Port, during the entire year, snow falls for 20.8 days, and aggregates up to 4.37" (111mm) of snow.

Ocean temperature

In Harwich Port, 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 January is 9.6h.

Sunshine

In January, the average sunshine in Harwich Port is 4.5h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Harwich Port. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 2 in January interpret into the following advice:
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What are the coldest months in Harwich Port?

January and February, with an average high-temperature of 39°F (3.9°C), are the coldest months in Harwich Port.

What is the average humidity in January in Harwich Port?

In January, the average relative humidity in Harwich Port, Massachusetts, is 75%.

How many days does it rain in January in Harwich Port?

In January, in Harwich Port, the rain falls for 9.5 days. Throughout January, 1.69" (43mm) of precipitation is accumulated.

How much does it snow in Harwich Port in January?

In Harwich Port, Massachusetts, during January, snow falls for 6 days and regularly aggregates up to 1.34" (34mm) of snow.

What is the water temperature in January in Harwich Port?

In Harwich Port, Massachusetts, 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 Harwich Port have in January?

In Harwich Port, Massachusetts, the average length of the day in January is 9.6h.

How long on average sun shines in January in Harwich Port?

In January, the average sunshine in Harwich Port is 4.5h.

When is the lowest UV index in Harwich Port?

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

What is the UV index intensity in January in Harwich Port?

In January, the average daily maximum UV index in Harwich Port is 2. A UV Index reading of 2, and below, represents a low health threat from the exposure to the Sun's UV radiation.

Average temperature in January
Harwich Port, MA

Average temperature in January - Harwich Port, MA
  • Average high temperature in January: 39°F

The warmest month (with the highest average high temperature) is August (71.6°F).
Months with the lowest average high temperature are January and February (39°F).

  • Average low temperature in January: 31.6°F

The month with the highest average low temperature is August (68.2°F).
The coldest month (with the lowest average low temperature) is January (31.6°F).

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Average pressure in January
Harwich Port, MA

Average pressure in January - Harwich Port, MA
  • Average pressure in January: 29.99"

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
Harwich Port, MA

Average wind speed in January - Harwich Port, MA
  • Average wind speed in January: 18mph

The windiest month (with the highest average wind speed) is January (18mph).
The calmest month (with the lowest average wind speed) is August (11.4mph).

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Average humidity in January
Harwich Port, MA

Average humidity in January - Harwich Port, MA
  • Average humidity in January: 75%

Months with the highest relative humidity are June and July (85%).
The month with the lowest relative humidity is November (74%).

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Average rainfall in January
Harwich Port, MA

Average rainfall in January - Harwich Port, MA
  • Average rainfall in January: 1.69"

The wettest month (with the highest rainfall) is October (2.83").
The driest month (with the least rainfall) is November (1.46").

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Average rainfall days in January
Harwich Port, MA

Average rainfall days in January - Harwich Port, MA
  • Average rainfall days in January: 9.5 days

The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is February (8.3 days).

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Average snowfall in January
Harwich Port, MA

Average snowfall in January - Harwich Port, MA
  • Average snowfall in January: 1.34"

The month with the highest snowfall is February (1.38").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in January
Harwich Port, MA

Average snowfall days in January - Harwich Port, MA
  • Average snowfall days in January: 6 days

The month with the highest number of snowfall days is January (6 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
Harwich Port, MA

Average sea temperature in January - Harwich Port, 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
Harwich Port, MA

Average daylight in January / Average sunshine in January - Harwich Port, 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: 4.5h

The month with the most sunshine is August (Average sunshine: 10.7h).
The month with the least sunshine is December (Average sunshine: 4.3h).

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Average sunshine days in January
Harwich Port, MA

Average sunshine days in January - Harwich Port, MA
  • Average sunshine days in January: 13 days

The month with the most sunshine days is August (17.6 days).
The month with the least sunshine days is January (13 days).

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Average UV index in January
Harwich Port, MA

Average UV index in January - Harwich Port, 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
Harwich Port, MA

Average cloud cover in January - Harwich Port, MA
  • Average cloud cover in January: 52

The month with the most cloud cover is December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in January
Harwich Port, MA

Average visibility in January - Harwich Port, 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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