Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December in Alexandria?
When are sunrise and sunset in December?
How many hours of sunshine does Alexandria have in December?
When is the lowest UV index in Alexandria?
How high is the UV index in December?
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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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
Weather forecast for your location
2. Allow the app to use your location