December weather forecastBethesda, OH
December
Weather in December
December, the first month of the winter in Bethesda, is also a wintry month, with an average temperature ranging between min 28.6°F (-1.9°C) and max 39.7°F (4.3°C).Temperature
December's arrival comes with a decrease in the average high-temperature, moving from a frosty 49.5°F (9.7°C) in November to an icy 39.7°F (4.3°C). In the month of December, Bethesda witnesses a consistent average low-temperature of 28.6°F (-1.9°C).Humidity
The average relative humidity in December in Bethesda is 83%.Rainfall
In Bethesda, in December, it is raining for 8.6 days, with typically 0.87" (22mm) of accumulated precipitation. Throughout the year, there are 121 rainfall days, and 10.24" (260mm) of precipitation is accumulated.Snowfall
Months with snowfall in Bethesda are January through May, October through December. In Bethesda, in December, snow falls for 6.9 days, with typically accumulated 0.75" (19mm) of snow. Throughout the year, in Bethesda, there are 34.6 snowfall days, and 4.72" (120mm) of snow is accumulated.Daylight
The month with the shortest days in Bethesda, Ohio, is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:27 am and sunset at 4:59 pm. On the last day of December, sunrise is at 7:46 am and sunset at 5:09 pm EST.
Sunshine
The average sunshine in December is 3.5h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 1 during December leads to these instructions:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Bethesda, OH
- Average high temperature in December: 39.7°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 28.6°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
Bethesda, OH
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Bethesda, OH
- Average wind speed in December: 7.1mph
The windiest months (with the highest average wind speed) are January and February (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in December
Bethesda, OH
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in December
Bethesda, OH
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is May (1.3").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days in December
Bethesda, OH
- Average rainfall days in December: 8.6 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is November (5.8 days).
Average snowfall in December
Bethesda, OH
- Average snowfall in December: 0.75"
The month with the highest snowfall is February (1.22").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Bethesda, OH
- Average snowfall days in December: 6.9 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Bethesda, OH
- 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: 3h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
Bethesda, OH
- Average sunshine days in December: 18.2 days
The month with the most sunshine days is November (21.4 days).
The month with the least sunshine days is May (12.6 days).
Average UV index in December
Bethesda, OH
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Bethesda, OH
- Average cloud cover in December: 63
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Bethesda, OH
- 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).
