December weather forecast and climate
Brookline, NH

December, the first month of the winter, in Brookline, is also a wintry month, with average temperature fluctuating between 36.7°F (2.6°C) and 25.7°F (-3.5°C).

Temperature

In Brookline, the average high-temperature decreases, from a chilly 47.3°F (8.5°C) in November, to a cold 36.7°F (2.6°C). In Brookline, in December, the average low-temperature is 25.7°F (-3.5°C).

Humidity

In December, the average relative humidity in Brookline is 79%.

Rainfall

The wettest months in Brookline are October and December, with an average 2.83" (72mm) of rainfall.

Snowfall

January through May, October through December are months with snowfall in Brookline. In Brookline, New Hampshire, snow falls for 5.5 days, with typically accumulated 5" (127mm) of snow. In Brookline, during the entire year, snow falls for 35.7 days, and aggregates up to 25.35" (644mm) of snow.

Daylight

With an average of 9.1h of daylight, December has the shortest days of the year in Brookline.

Sunshine

In Brookline, New Hampshire, the average sunshine in December is 4.9h.

UV index

Months with the lowest UV index in Brookline 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 threat to health from the exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always 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. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in December in Brookline?

In Brookline, New Hampshire, in December, the average high-temperature is 36.7°F (2.6°C), and the average low-temperature is 25.7°F (-3.5°C).

What is the average humidity in December in Brookline?

The average relative humidity in December is 79%.

How many days does it rain in December in Brookline?

In Brookline, New Hampshire, during December, the rain falls for 10.6 days and regularly aggregates up to 2.83" (72mm) of precipitation.

What is the wettest month in Brookline?

Months with the most rainfall in Brookline are October and December, with an average 2.83" (72mm) of precipitation.

How many days does it snow in December in Brookline?

In December, in Brookline, New Hampshire, it is snowing for 5.5 days. Throughout December, 5" (127mm) of snow is accumulated.

What is the month with the shortest days in Brookline?

December has the shortest days of the year, with an average of 9.1h of daylight.

How many hours of daylight does Brookline have in December?

In December, the average length of the day in Brookline, New Hampshire, is 9.1h.

How long on average sun shines in December in Brookline?

The average sunshine in December in Brookline, New Hampshire, is 4.9h.

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

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

What is the UV index reading in December in Brookline?

The average daily maximum UV index in December in Brookline is 2. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to the UV radiation.
Average temperature in December - Brookline, NH
  • Average high temperature in December: 2.6°C

The warmest month (with the highest average high temperature) is July (27.7°C).
The month with the lowest average high temperature is January (-0.6°C).

  • Average low temperature in December: -3.5°C

The month with the highest average low temperature is July (16.5°C).
The coldest month (with the lowest average low temperature) is January (-7.5°C).

Average pressure in December - Brookline, NH
  • Average pressure in December: 1017.2mbar

The month with the highest atmospheric pressure is November (1018.3mbar).
The month with the lowest atmospheric pressure is June (1013.2mbar).

Average wind speed in December - Brookline, NH
  • Average wind speed in December: 12.5km/h

The windiest month (with the highest average wind speed) is January (13.3km/h).
The calmest month (with the lowest average wind speed) is August (8.5km/h).

Average humidity in December - Brookline, NH
  • Average humidity in December: 79%

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (71%).

Average rainfall in December - Brookline, NH
  • Average rainfall in December: 72mm

The wettest months (with the highest rainfall) are October and December (72mm).
The driest month (with the least rainfall) is September (38mm).

Average rainfall days in December - Brookline, NH
  • Average rainfall days in December: 10.6 days

The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (7.3 days).

Average snowfall in December - Brookline, NH
  • Average snowfall in December: 127mm

The month with the highest snowfall is February (162mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December - Brookline, NH
  • Average snowfall days in December: 5.5 days

The month with the highest number of snowfall days is January (9.1 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - Brookline, NH
  • Average daylight in December: 9.1h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in December: 4.9h

The month with the most sunshine is August (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.6h).

Average sunshine days in December - Brookline, NH
  • Average sunshine days in December: 17.3 days

The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is May (13.2 days).

Average UV index in December - Brookline, NH
  • Average UV index in December: 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).

Average cloud cover in December - Brookline, NH
  • Average cloud cover in December: 46

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).

Average visibility in December - Brookline, NH
  • Average visibility in December: 9km

Months with the highest visibility are April, November and December (9km).
Months with the lowest visibility are January, February, March, May, June, July, August, September and October (8km).