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 transition into December is accompanied by a temperature decrease, with the average high-temperature shifting from a fresh 52.9°F (11.6°C) in November to a chilly 43.7°F (6.5°C). Throughout the month of December, the average temperature in Bethlehem dips to a freezing cold 31.3°F (-0.4°C) at night.Humidity
The months with the highest humidity in Bethlehem are February and December, with an average relative humidity of 81%.Rainfall
In Bethlehem, Indiana, in December, it is raining for 10.9 days, with typically 1.81" (46mm) of accumulated precipitation. Throughout the year, in Bethlehem, Indiana, there are 147.9 rainfall days, and 23.98" (609mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In Bethlehem, during December, snow falls for 5.5 days and regularly aggregates up to 1.1" (28mm) of snow. Throughout the year, in Bethlehem, there are 25.8 snowfall days, and 6.02" (153mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:40 am and sunset at 5:21 pm. On the last day of December, sunrise is at 7:59 am and sunset at 5:30 pm EST.
Sunshine
In Bethlehem, the average sunshine in December is 4.3h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, an average UV index of 2 transforms into the following instructions:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in Bethlehem in December?
What are the most humid months in Bethlehem?
What is the average humidity in December in Bethlehem?
How many days does it rain in December in Bethlehem?
How much does it snow in Bethlehem in December?
What is the month with the shortest days in Bethlehem?
What is the average length of the day in December in Bethlehem?
When is the sunrise / sunset in December in Bethlehem?
How long on average sun shines in December in Bethlehem?
What is the month with the lowest UV index in Bethlehem?
What is the UV index intensity in December in Bethlehem?
Average temperature in December
Bethlehem, IN
- Average high temperature in December: 43.7°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in December: 31.3°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).
Average pressure in December
Bethlehem, IN
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Bethlehem, IN
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in December
Bethlehem, IN
- Average humidity in December: 81%
The months with the highest relative humidity are February and December (81%).
The months with the lowest relative humidity are August, September and October (75%).
Average rainfall in December
Bethlehem, IN
- Average rainfall in December: 1.81"
The wettest month (with the highest rainfall) is April (2.64").
The driest month (with the least rainfall) is September (1.3").
Average rainfall days in December
Bethlehem, IN
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in December
Bethlehem, IN
- Average snowfall in December: 1.1"
The month with the highest snowfall is March (1.54").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Bethlehem, IN
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is January (7.2 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
Bethlehem, IN
- 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: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in December
Bethlehem, IN
- Average sunshine days in December: 15.9 days
The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is May (11.9 days).
Average UV index in December
Bethlehem, IN
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Bethlehem, IN
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Bethlehem, IN
- Average visibility in December: 6mi
The months with the highest visibility are March, April, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, May and July (5mi).
Bethlehem, Indiana, USA
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