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
In Jefferson, the average high-temperature in December decreases from a chilly 46.2°F (7.9°C) in November to a wintry 37°F (2.8°C). Jefferson documents a consistent average low-temperature of 29.8°F (-1.2°C) at night during December.Humidity
In Jefferson, Ohio, the average relative humidity in December is 84%.Rainfall
In Jefferson, in December, during 10.9 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. Throughout the year, in Jefferson, Ohio, there are 181 rainfall days, and 36.34" (923mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 15.4 days. Throughout December, 5.08" (129mm) of snow is accumulated. Throughout the year, there are 71.4 snowfall days, and 25.28" (642mm) of snow is accumulated.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:31 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 5:02 pm EST.
Sunshine
The average sunshine in December is 2.9h.UV index
December is the month with the lowest UV index in Jefferson, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In December, a daily maximum UV index of 1 leads to the following instructions:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Frequently asked questions
How cold is December in Jefferson?
What is the average humidity in December in Jefferson?
How many days does it rain in December in Jefferson?
How much does it snow in Jefferson in December?
What is the month with the shortest days in Jefferson?
How many hours of daylight does Jefferson have in December?
When is the sunrise / sunset in December in Jefferson?
How long on average sun shines in December in Jefferson?
What is the month with the lowest UV index in Jefferson?
What is the UV index intensity in December in Jefferson?
Average temperature in December
Jefferson, OH
- Average high temperature in December: 37°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in December: 29.8°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in December
Jefferson, OH
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Jefferson, OH
- Average wind speed in December: 11.3mph
The windiest month (with the highest average wind speed) is January (11.4mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in December
Jefferson, OH
- Average humidity in December: 84%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are July, August and September (78%).
Average rainfall in December
Jefferson, OH
- Average rainfall in December: 2.72"
The wettest month (with the highest rainfall) is June (3.94").
The driest months (with the least rainfall) are February and November (2.4").
Average rainfall days in December
Jefferson, OH
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is August (18.8 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in December
Jefferson, OH
- Average snowfall in December: 5.08"
The month with the highest snowfall is January (6.69").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Jefferson, OH
- Average snowfall days in December: 15.4 days
The month with the highest number of snowfall days is January (18.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Jefferson, OH
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 2h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in December
Jefferson, OH
- Average sunshine days in December: 6.7 days
The month with the most sunshine days is September (11 days).
The month with the least sunshine days is January (5.9 days).
Average UV index in December
Jefferson, OH
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Jefferson, OH
- Average cloud cover in December: 71
The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in December
Jefferson, OH
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Jefferson, Ohio, USA
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