December weather forecast
Brownsville, PA

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Weather in December

December, the first month of the winter in Brownsville, is also a wintry month, with an average temperature varying between 28.8°F (-1.8°C) and 40.1°F (4.5°C).

Temperature

The move into December indicates a reduction in the average high-temperature, down from November's cool 50°F (10°C) to an icy 40.1°F (4.5°C). An average low-temperature of 28.8°F (-1.8°C) is expected during December.

Humidity

The average relative humidity in December is 83%.

Rainfall

In December, in Brownsville, the rain falls for 5 days. Throughout December, 0.51" (13mm) of precipitation is accumulated. In Brownsville, during the entire year, the rain falls for 82.6 days and collects up to 6.1" (155mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. The months with the most snowfall in Brownsville are February and December, with an average 0.35" (9mm) of accumulated snow.

Daylight

The month with the shortest days is December, with an average of 9h and 24min of daylight.
On the first day of December in Brownsville, sunrise is at 7:22 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:04 pm EST.

Sunshine

The average sunshine in December is 3.5h.

UV index

The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index, 2 during December, leads to the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Updated: Aug 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold in Brownsville during December?

During December, Brownsville experiences an average high-temperature of 40.1°F (4.5°C) and a low-temperature of 28.8°F (-1.8°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in August is estimated at 87.8°F (31°C).

What is the average humidity in December?

The average relative humidity in December is 83%.

How many days does it rain in December?

In December, the rain falls for 5 days. Throughout December, 0.51" (13mm) of precipitation is accumulated.

When does it snow the most?

The months with the most snowfall are February and December, with an average 0.35" (9mm) of accumulated snow.

How much does it snow in December?

In Brownsville, in December, during 3.6 snowfall days, 0.35" (9mm) of snow is typically accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 24min of daylight.

How many hours of daylight does Brownsville have in December?

In December, the average day length is 9h and 23min.

What time are sunrise and sunset in December in Brownsville?

On the first day of December, sunrise is at 7:22 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:04 pm EST.

How many hours of sunshine does Brownsville have in December?

In December, the average sunshine duration is 3.5h.

What is the month with the lowest UV index?

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

What is the UV index reading in December?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health threat 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 December
Brownsville, PA

Average temperature in December - Brownsville, PA
  • Average high temperature in December: 40.1°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (34.3°F).

  • Average low temperature in December: 28.8°F

The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).

Average pressure in December
Brownsville, PA

Average pressure in December - Brownsville, PA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
Brownsville, PA

Average wind speed in December - Brownsville, PA
  • Average wind speed in December: 7.2mph

The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).

Average humidity in December
Brownsville, PA

Average humidity in December - Brownsville, PA
  • Average humidity in December: 83%

The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are April, July, August and November (77%).

Average rainfall in December
Brownsville, PA

Average rainfall in December - Brownsville, PA
  • Average rainfall in December: 0.51"

The wettest month (with the highest rainfall) is May (0.71").
The driest month (with the least rainfall) is September (0.28").

Average rainfall days in December
Brownsville, PA

Average rainfall days in December - Brownsville, PA
  • Average rainfall days in December: 5 days

The month with the highest number of rainy days is July (9.8 days).
The month with the least rainy days is February (4 days).

Average snowfall in December
Brownsville, PA

Average snowfall in December - Brownsville, PA
  • Average snowfall in December: 0.35"

The months with the highest snowfall are February and December (0.35").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Brownsville, PA

Average snowfall days in December - Brownsville, PA
  • Average snowfall days in December: 3.6 days

The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Brownsville, PA

Average daylight in December / Average sunshine in December - Brownsville, PA
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 3h and 3min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

Average sunshine days in December
Brownsville, PA

Average sunshine days in December - Brownsville, PA
  • Average sunshine days in December: 22.4 days

The month with the most sunshine days is November (23.2 days).
The month with the least sunshine days is June (17.3 days).

Average UV index in December
Brownsville, PA

Average UV index in December - Brownsville, PA
  • Average UV index in December: 2

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

Average cloud cover in December
Brownsville, PA

Average cloud cover in December - Brownsville, PA
  • Average cloud cover in December: 64

The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 35).

Average visibility in December
Brownsville, PA

Average visibility in December - Brownsville, PA
  • Average visibility in December: 5mi

The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).

Brownsville, Pennsylvania, USA

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