January weather forecast
Newton, MA

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Ancient historic buildings within the Union Historic District in Newton City, Massachusetts
Ancient historic buildings within the Union Historic District in Newton City, Massachusetts

Weather in January

January in Newton, Massachusetts presents as a decidedly frosty month, in the firm clutches of the New England winter. Thermometer readings can take a dip to an icy 21.7°F (-5.7°C) as a low, while a lukewarm 33.6°F (0.9°C) marks the high. Taking the month as a whole, the weather appears relatively static, with little variation initializing the calendar year. Cloud cover remains substantial across the month, influencing the subdued daylight. The new year promises a snowy start in Newton, with winter sports enthusiasts possibly finding conditions to their liking.

Temperature

With average high temperatures of 33.6°F (0.9°C) and lows of 21.7°F (-5.7°C), January is the coldest month.

Humidity

In January, the average relative humidity is 77%.

Rainfall

In Newton, in January, it is raining for 5.7 days, with typically 0.43" (11mm) of accumulated precipitation. In Newton, Massachusetts, during the entire year, the rain falls for 85.9 days and collects up to 5.87" (149mm) of precipitation.

Snowfall

January through May, November and December are months with snowfall in Newton, Massachusetts. In Newton, in January, during 4.9 snowfall days, 0.39" (10mm) of snow is typically accumulated. In Newton, during the entire year, snow falls for 18.8 days and aggregates up to 3.15" (80mm) of snow.

Daylight

In January, the average length of the day in Newton is 9h and 30min.
On the first day of January in Newton, sunrise is at 7:13 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 4:56 pm EST.

Sunshine

In January, the average sunshine is 5.2h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Newton. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.
Note: In January, the maximum UV index of 2 suggests this advice:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
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Frequently asked questions

What part of the year is the coldest in Newton?

January is the month when Newton, Massachusetts, sees the average lowest temperatures, with a high of 33.6°F (0.9°C) and a low of 21.7°F (-5.7°C).

How cold is January in Newton?

In Newton, 33.6°F (0.9°C) is the average high-temperature and 21.7°F (-5.7°C) is the average low-temperature during January.

What is the average humidity in January in Newton?

In January, the average relative humidity is 77%.

How many days does it rain in January in Newton?

In Newton, in January, it is raining for 5.7 days, with typically 0.43" (11mm) of accumulated precipitation.

How many days does it snow in January in Newton?

In January, in Newton, it is snowing for 4.9 days. Throughout January, 0.39" (10mm) of snow is accumulated.

How many hours of daylight does Newton have in January?

The average day length in January in Newton is 9h and 30min.

What time are sunrise and sunset in January in Newton?

In January, on the first day of the month, sunrise is at 7:13 am and sunset at 4:22 pm. On the last day of the month, in Newton, Massachusetts, sunrise is at 6:59 am and sunset at 4:56 pm EST.

How long on average sun shines in January in Newton?

In Newton, the average sunshine duration in January is 5.2h.

When is the lowest UV index in Newton?

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

How high is the UV index in January in Newton?

The average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from 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
Newton, MA

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

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (33.6°F).

  • Average low temperature in January: 21.7°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).

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Average pressure in January
Newton, MA

Average pressure in January - Newton, MA
  • Average pressure in January: 30.01"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in January
Newton, MA

Average wind speed in January - Newton, MA
  • Average wind speed in January: 9.1mph

The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

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Average humidity in January
Newton, MA

Average humidity in January - Newton, 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
Newton, MA

Average rainfall in January - Newton, MA
  • Average rainfall in January: 0.43"

The wettest month (with the highest rainfall) is November (0.67").
The driest month (with the least rainfall) is September (0.24").

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Average rainfall days in January
Newton, MA

Average rainfall days in January - Newton, MA
  • Average rainfall days in January: 5.7 days

The month with the highest number of rainy days is July (10.2 days).
The month with the least rainy days is February (4.1 days).

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Average snowfall in January
Newton, MA

Average snowfall in January - Newton, MA
  • Average snowfall in January: 0.39"

The month with the highest snowfall is December (0.91").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in January
Newton, MA

Average snowfall days in January - Newton, MA
  • Average snowfall days in January: 4.9 days

The month with the highest number of snowfall days is January (4.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in January / Average sunshine in January - Newton, MA
  • Average daylight in January: 9h and 3min

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 6min).

  • Average sunshine in January: 5h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in January
Newton, MA

Average sunshine days in January - Newton, MA
  • Average sunshine days in January: 22.5 days

The months with the most sunshine days are January and November (22.5 days).
The month with the least sunshine days is June (17.5 days).

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Average UV index in January
Newton, MA

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

The months with the highest UV index are June, July and August (UV index 6).
The 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
Newton, MA

Average cloud cover in January - Newton, MA
  • Average cloud cover in January: 44

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in January
Newton, MA

Average visibility in January - Newton, 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).

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Newton, Massachusetts, USA

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