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
Somerville in December demonstrates a small temperature transition, adjusting from an average high of a chilly 49.5°F (9.7°C) in November to a cold 39.6°F (4.2°C). During December, Somerville's temperature averages to a freezing cold 28.8°F (-1.8°C) at night.Humidity
The months with the highest humidity are January, February and December, with an average relative humidity of 82%.Rainfall
In Somerville, in December, during 12.1 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. In Somerville, during the entire year, the rain falls for 169 days and collects up to 31.85" (809mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Somerville, in December, snow falls for 9.2 days, with typically accumulated 2.17" (55mm) of snow. Throughout the year, in Somerville, Ohio, there are 40.7 snowfall days, and 12.48" (317mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:40 am and sunset at 5:15 pm. On the last day of the month, sunrise is at 7:58 am and sunset at 5:24 pm EST.
Sunshine
The average sunshine in December is 4.1h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Somerville. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 2 during December leads to these instructions:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Frequently asked questions
How cold does it get in Somerville in December?
What are the most humid months in Somerville?
What is the average humidity in December in Somerville?
How much does it rain in Somerville in December?
How many days does it snow in December in Somerville?
What is the month with the shortest days in Somerville?
How many hours of daylight does Somerville have in December?
When is the sunrise / sunset in December in Somerville?
How many hours of sunshine does Somerville have in December?
What is the month with the lowest UV index in Somerville?
What is the UV index reading in December in Somerville?
Average temperature in December
Somerville, OH
- Average high temperature in December: 39.6°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in December: 28.8°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Somerville, OH
- Average pressure in December: 30.12"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Somerville, OH
- Average wind speed in December: 8.9mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in December
Somerville, OH
- Average humidity in December: 82%
The months with the highest relative humidity are January, February and December (82%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in December
Somerville, OH
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in December
Somerville, OH
- Average rainfall days in December: 12.1 days
The month with the highest number of rainy days is May (20.5 days).
The month with the least rainy days is February (9.2 days).
Average snowfall in December
Somerville, OH
- Average snowfall in December: 2.17"
The month with the highest snowfall is January (3.11").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Somerville, OH
- Average snowfall days in December: 9.2 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Somerville, OH
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Somerville, OH
- Average sunshine days in December: 11.7 days
The month with the most sunshine days is November (16.7 days).
The month with the least sunshine days is May (8.8 days).
Average UV index in December
Somerville, OH
- 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
Somerville, OH
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Somerville, OH
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Somerville, Ohio, USA
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