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
The onset of December is marked by a minor decrease in temperature, transitioning from a cool 54.5°F (12.5°C) in November to a frosty 46.8°F (8.2°C). Throughout the month of December, Bethlehem reports a steady low-temperature average of 36.1°F (2.3°C).Humidity
In Bethlehem, the average relative humidity in December is 76%.Rainfall
In Bethlehem, in December, during 8.6 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. Throughout the year, there are 130 rainfall days, and 15.04" (382mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Bethlehem, during December, snow falls for 1.5 days and regularly aggregates up to 0.43" (11mm) of snow. In Bethlehem, during the entire year, snow falls for 9.4 days and aggregates up to 1.85" (47mm) of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:03 am and sunset at 4:42 pm. On the last day of December, sunrise is at 7:21 am and sunset at 4:52 pm EST.
Sunshine
In Bethlehem, the average sunshine in December is 5.3h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 2 during December translates into the following guidance:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Bethlehem in December?
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?
How many hours of daylight does Bethlehem have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Bethlehem, MD
- Average high temperature in December: 46.8°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (40.6°F).
- Average low temperature in December: 36.1°F
The month with the highest average low temperature is July (70.9°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).
Average pressure in December
Bethlehem, MD
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Bethlehem, MD
- Average wind speed in December: 8.9mph
The windiest months (with the highest average wind speed) are February and March (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in December
Bethlehem, MD
- Average humidity in December: 76%
The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January and November (73%).
Average rainfall in December
Bethlehem, MD
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is August (1.93").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in December
Bethlehem, MD
- Average rainfall days in December: 8.6 days
The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is February (7.4 days).
Average snowfall in December
Bethlehem, MD
- Average snowfall in December: 0.43"
The month with the highest snowfall is January (0.59").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Bethlehem, MD
- Average snowfall days in December: 1.5 days
The month with the highest number of snowfall days is January (3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Bethlehem, MD
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in December
Bethlehem, MD
- Average sunshine days in December: 20.1 days
The month with the most sunshine days is November (21 days).
The month with the least sunshine days is August (13 days).
Average UV index in December
Bethlehem, MD
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in December
Bethlehem, MD
- Average cloud cover in December: 44
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in December
Bethlehem, MD
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Bethlehem, Maryland, USA
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