January weather forecast
Mattapan, MA

Weather in January

January, the same as December, is a wintry winter month in Mattapan, Massachusetts, with temperature in the range of an average low of 21.9°F (-5.6°C) and an average high of 33.6°F (0.9°C).

Temperature

With an average high-temperature of 33.6°F (0.9°C) and an average low-temperature of 21.9°F (-5.6°C), January is the coldest month.

Humidity

In Mattapan, the average relative humidity is 77%.

Rainfall

In Mattapan, in January, it is raining for 7.8 days, with typically 2.32" (59mm) of accumulated precipitation. Throughout the year, there are 147.4 rainfall days, and 28.39" (721mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In January, it is snowing for 7.9 days. Throughout January, 3.39" (86mm) of snow is accumulated. In Mattapan, during the entire year, snow falls for 32.7 days, and aggregates up to 22.01" (559mm) of snow.

Daylight

In Mattapan, the average length of the day is 9.5h.

Sunshine

In Mattapan, the average sunshine is 5.1h.

UV index

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 minimal health hazard from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 2 in January transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 Mattapan?

With an average high-temperature of 33.6°F (0.9°C) and an average low-temperature of 21.9°F (-5.6°C), January is the coldest month in Mattapan, Massachusetts.

What is the average humidity in January in Mattapan?

In Mattapan, Massachusetts, the average relative humidity in January is 77%.

How many days does it rain in January in Mattapan?

In January, in Mattapan, Massachusetts, the rain falls for 7.8 days. Throughout January, 2.32" (59mm) of precipitation is accumulated.

How many days does it snow in January in Mattapan?

In Mattapan, Massachusetts, in January, during 7.9 snowfall days, 3.39" (86mm) of snow is typically accumulated.

How many hours of daylight does Mattapan have in January?

In Mattapan, the average length of the day in January is 9.5h.

How long on average sun shines in January in Mattapan?

In Mattapan, the average sunshine in January is 5.1h.

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

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

What is the UV index intensity in January in Mattapan?

The average daily maximum UV index in January in Mattapan, Massachusetts, 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
Mattapan, MA

Average temperature in January - Mattapan, MA
  • Average high temperature in January: 33.6°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (33.6°F).

  • Average low temperature in January: 21.9°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).

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Average pressure in January
Mattapan, MA

Average pressure in January - Mattapan, MA
  • Average pressure in January: 30.01"

The month with the highest atmospheric pressure is November (30.07").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in January
Mattapan, MA

Average wind speed in January - Mattapan, MA
  • Average wind speed in January: 9.5mph

The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is August (6mph).

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Average humidity in January
Mattapan, MA

Average humidity in January - Mattapan, MA
  • Average humidity in January: 77%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (70%).

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Average rainfall in January
Mattapan, MA

Average rainfall in January - Mattapan, MA
  • Average rainfall in January: 2.32"

The wettest month (with the highest rainfall) is December (2.95").
The driest month (with the least rainfall) is September (1.5").

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Average rainfall days in January
Mattapan, MA

Average rainfall days in January - Mattapan, MA
  • Average rainfall days in January: 7.8 days

The month with the highest number of rainy days is July (15.8 days).
Months with the least rainy days are January and February (7.8 days).

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Average snowfall in January
Mattapan, MA

Average snowfall in January - Mattapan, MA
  • Average snowfall in January: 3.39"

The month with the highest snowfall is March (5.24").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Mattapan, MA

Average snowfall days in January - Mattapan, MA
  • Average snowfall days in January: 7.9 days

The month with the highest number of snowfall days is February (8.2 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Mattapan, MA

Average daylight in January / Average sunshine in January - Mattapan, MA
  • Average daylight in January: 9.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in January: 5.1h

The month with the most sunshine is August (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.7h).

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Average sunshine days in January
Mattapan, MA

Average sunshine days in January - Mattapan, MA
  • Average sunshine days in January: 17.3 days

The month with the most sunshine days is November (18 days).
The month with the least sunshine days is April (13.2 days).

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Average UV index in January
Mattapan, MA

Average UV index in January - Mattapan, MA
  • Average UV index in January: 2

Months with the highest UV index are June, 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
Mattapan, MA

Average cloud cover in January - Mattapan, MA
  • Average cloud cover in January: 45

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in January
Mattapan, MA

Average visibility in January - Mattapan, 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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