December weather forecastBethany, MO
December
Weather in December
December brings in the winter weather full force. Bethany experiences a considerable drop in temperature from November, and colder conditions become more pronounced during this month. The city sees an increment in the average snowfall, with approximately 1.42" (36mm) distributed over around 4.7 days. The marked decrease in daylight and sunshine hours makes days seem significantly shorter, and the winter solstice, the shortest day of the year, occurs in December. As December unfolds, the weather indeed gives a frosty welcome to winter and the New Year.Temperature
The shift from November to December involves a decrease in the average high-temperature, from a frosty 49.6°F (9.8°C) to an icy 37°F (2.8°C). Bethany's average low-temperature for the month of December records at a subzero cold 24.1°F (-4.4°C).Humidity
The average relative humidity in December is 78%.Rainfall
In Bethany, during December, the rain falls for 5.4 days and regularly aggregates up to 0.94" (24mm) of precipitation. In Bethany, during the entire year, the rain falls for 129.2 days and collects up to 25.35" (644mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Bethany, in December, during 4.7 snowfall days, 1.42" (36mm) of snow is typically accumulated. In Bethany, during the entire year, snow falls for 26.5 days and aggregates up to 12.64" (321mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in Bethany.On the first day of December in Bethany, sunrise is at 7:20 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 5:00 pm CST.
Sunshine
The average sunshine in December is 5h.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 low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Bethany, MO
- Average high temperature in December: 37°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 24.1°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in December
Bethany, MO
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Bethany, MO
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is March (10mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in December
Bethany, MO
- Average humidity in December: 78%
The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Bethany, MO
- Average rainfall in December: 0.94"
The wettest month (with the highest rainfall) is June (3.86").
The driest months (with the least rainfall) are January and February (0.91").
Average rainfall days in December
Bethany, MO
- Average rainfall days in December: 5.4 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in December
Bethany, MO
- Average snowfall in December: 1.42"
The month with the highest snowfall is January (3.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Bethany, MO
- Average snowfall days in December: 4.7 days
The month with the highest number of snowfall days is January (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
Bethany, MO
- Average daylight in December: 9h and 24min
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 24min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Bethany, MO
- Average sunshine days in December: 20.3 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in December
Bethany, MO
- 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
Bethany, MO
- Average cloud cover in December: 45
The months with the most cloud cover are January and March (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in December
Bethany, MO
- 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).
