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 shifts into December, a slight alteration in temperatures is observed, with average highs reducing from a frosty 47.5°F (8.6°C) to an icy 37.2°F (2.9°C). In the month of December, Bethlehem witnesses a consistent average low-temperature of 26.4°F (-3.1°C).Humidity
In Bethlehem, the average relative humidity in December is 80%.Rainfall
The month with the most rainfall is December, when the rain falls for 10.8 days and typically aggregates up to 3.62" (92mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Bethlehem, in December, during 7.4 snowfall days, 3.94" (100mm) of snow is typically accumulated. In Bethlehem, during the entire year, snow falls for 39.4 days and aggregates up to 24.37" (619mm) of snow.Daylight
December has the shortest days of the year in Bethlehem, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:00 am and sunset at 4:23 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:32 pm EST.
Sunshine
The average sunshine in December in Bethlehem is 4.6h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Bethlehem. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 2 in December translates into these instructions:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Bethlehem in December?
What is the average humidity in December in Bethlehem?
What is the rainiest month 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, CT
- Average high temperature in December: 37.2°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Bethlehem, CT
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Bethlehem, CT
- Average wind speed in December: 7.7mph
The windiest months (with the highest average wind speed) are January and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Bethlehem, CT
- Average humidity in December: 80%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (73%).
Average rainfall in December
Bethlehem, CT
- Average rainfall in December: 3.62"
The wettest month (with the highest rainfall) is December (3.62").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in December
Bethlehem, CT
- Average rainfall days in December: 10.8 days
The month with the highest number of rainy days is June (17.7 days).
The months with the least rainy days are January and February (8.1 days).
Average snowfall in December
Bethlehem, CT
- Average snowfall in December: 3.94"
The month with the highest snowfall is February (6.1").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Bethlehem, CT
- Average snowfall days in December: 7.4 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Bethlehem, CT
- Average daylight in December: 9h and 1min
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 12min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in December
Bethlehem, CT
- Average sunshine days in December: 15 days
The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in December
Bethlehem, CT
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Bethlehem, CT
- Average cloud cover in December: 50
The months with the most cloud cover are February and March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in December
Bethlehem, CT
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Bethlehem, Connecticut, USA
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