December weather forecast
Alexandria, PA

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Weather in December

December, the first month of the winter in Alexandria, is still a cold month, with an average temperature ranging between max 37.6°F (3.1°C) and min 27.3°F (-2.6°C).

Temperature

As November transitions into December, Alexandria sees a drop in the average high-temperature, transitioning from a frosty 47.3°F (8.5°C) to an icy 37.6°F (3.1°C). Alexandria experiences a nighttime temperature average of 27.3°F (-2.6°C) during December.

Humidity

In December, the average relative humidity is 83%.

Rainfall

In Alexandria, Pennsylvania, during December, the rain falls for 12.6 days and regularly aggregates up to 2.01" (51mm) of precipitation. In Alexandria, Pennsylvania, during the entire year, the rain falls for 166.2 days and collects up to 23.86" (606mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Alexandria, during December, snow falls for 9.1 days and regularly aggregates up to 2.64" (67mm) of snow. In Alexandria, Pennsylvania, during the entire year, snow falls for 50 days and aggregates up to 16.77" (426mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:17 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:55 pm EST.

Sunshine

In December, the average sunshine is 3.9h.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The UV index of 1 in December translates into these instructions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Updated: Jul 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is December cold?

In Alexandria, in December, the average high-temperature is 37.6°F (3.1°C), and the average low-temperature is 27.3°F (-2.6°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in July is evaluated 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 Alexandria, in December, during 12.6 rainfall days, 2.01" (51mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Alexandria, in December, during 9.1 snowfall days, 2.64" (67mm) of snow is typically accumulated.

What is the month with the shortest days?

With an average of 9h and 18min of daylight, December has the shortest days of the year.

What is the average length of the day in December in Alexandria?

In Alexandria, the average day length in December is 9h and 20min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:17 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:55 pm EST.

How many hours of sunshine does Alexandria have in December?

In Alexandria, the average sunshine duration in December is 3.9h.

When is the lowest UV index in Alexandria?

The month with the lowest UV index is December, with an average maximum UV index of 1.

How high is the UV index in December?

The average daily maximum UV index in December is 1. A UV Index estimate 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 December
Alexandria, PA

Average temperature in December - Alexandria, PA
  • Average high temperature in December: 37.6°F

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (31.6°F).

  • Average low temperature in December: 27.3°F

The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

Average pressure in December
Alexandria, PA

Average pressure in December - Alexandria, PA
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
Alexandria, PA

Average wind speed in December - Alexandria, PA
  • Average wind speed in December: 7.8mph

The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in December
Alexandria, PA

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

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is July (76%).

Average rainfall in December
Alexandria, PA

Average rainfall in December - Alexandria, PA
  • Average rainfall in December: 2.01"

The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is November (1.5").

Average rainfall days in December
Alexandria, PA

Average rainfall days in December - Alexandria, PA
  • Average rainfall days in December: 12.6 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (10.3 days).

Average snowfall in December
Alexandria, PA

Average snowfall in December - Alexandria, PA
  • Average snowfall in December: 2.64"

The month with the highest snowfall is January (4.49").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Alexandria, PA

Average snowfall days in December - Alexandria, PA
  • Average snowfall days in December: 9.1 days

The month with the highest number of snowfall days is January (15 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Alexandria, 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 18min).

  • Average sunshine in December: 3h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in December
Alexandria, PA

Average sunshine days in December - Alexandria, PA
  • Average sunshine days in December: 13.3 days

The month with the most sunshine days is November (15.6 days).
The month with the least sunshine days is February (9.5 days).

Average UV index in December
Alexandria, PA

Average UV index in December - Alexandria, PA
  • Average UV index in December: 1

The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Alexandria, PA

Average cloud cover in December - Alexandria, PA
  • Average cloud cover in December: 59

The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 35).

Average visibility in December
Alexandria, PA

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

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

Alexandria, Pennsylvania, USA

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