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
December ushers in a slight temperature change, with average high-temperatures reducing from November's chilly 48.4°F (9.1°C) to a wintry 38.5°F (3.6°C). In Arlington Heights, the average temperature during the nights of December drops to a freezing cold 26.8°F (-2.9°C).Humidity
The months with the highest humidity are February, October and December, with an average relative humidity of 82%.Rainfall
In Arlington Heights, Pennsylvania, in December, it is raining for 11.9 days, with typically 3.07" (78mm) of accumulated precipitation. In Arlington Heights, during the entire year, the rain falls for 161.8 days and collects up to 32.24" (819mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 7.5 days. Throughout December, 3.58" (91mm) of snow is accumulated. Throughout the year, there are 38.6 snowfall days, and 19.76" (502mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:06 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:42 pm EST.
Sunshine
In December, the average sunshine is 4.4h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, a daily UV index of 1 turns into the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold?
What are the most humid months?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Arlington Heights have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Arlington Heights have in December?
When is the lowest UV index?
What is the UV index reading in December in Arlington Heights?
Average temperature in December
Arlington Heights, PA
- Average high temperature in December: 38.5°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 26.8°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 (19.9°F).
Average pressure in December
Arlington Heights, PA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Arlington Heights, PA
- Average wind speed in December: 7.4mph
The windiest months (with the highest average wind speed) are January and March (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Arlington Heights, PA
- Average humidity in December: 82%
The months with the highest relative humidity are February, October and December (82%).
The months with the lowest relative humidity are April and July (77%).
Average rainfall in December
Arlington Heights, PA
- Average rainfall in December: 3.07"
The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in December
Arlington Heights, PA
- Average rainfall days in December: 11.9 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is January (8.8 days).
Average snowfall in December
Arlington Heights, PA
- Average snowfall in December: 3.58"
The month with the highest snowfall is February (5.59").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Arlington Heights, PA
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is January (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Arlington Heights, PA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in December
Arlington Heights, PA
- Average sunshine days in December: 14.8 days
The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is April (11.1 days).
Average UV index in December
Arlington Heights, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Arlington Heights, PA
- Average cloud cover in December: 53
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in December
Arlington Heights, PA
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Arlington Heights, Pennsylvania, USA
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