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
The transition into December subtly indicates a reduction in the average high-temperature, down to a frosty 46.6°F (8.1°C) from November's fresh 54.5°F (12.5°C). Nighttime temperatures in Johnson City consistently average a wintry 32.4°F (0.2°C) during December.Humidity
The months with the highest humidity in Johnson City are February and December, with an average relative humidity of 79%.Rainfall
In Johnson City, in December, during 13.6 rainfall days, 3.07" (78mm) of precipitation is typically accumulated. Throughout the year, in Johnson City, there are 187.8 rainfall days, and 32.76" (832mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. December is the month with the most snowfall. Snow falls for 6.2 days and accumulates 3.74" (95mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 42min of daylight.On the first day of December in Johnson City, Tennessee, sunrise is at 7:22 am and sunset at 5:14 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 5:24 pm EST.
Sunshine
In Johnson City, Tennessee, the average sunshine in December is 5.5h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Johnson City. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high UV index of 2 in December translates into the following recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the temperature in December in Johnson City?
What is the most humid month in Johnson City?
What is the average humidity in December in Johnson City?
How many days does it rain in December in Johnson City?
When does it snow the most in Johnson City?
How many days does it snow in December in Johnson City?
What is the month with the shortest days in Johnson City?
How many hours of daylight does Johnson City have in December?
When are sunrise and sunset in December in Johnson City?
How many hours of sunshine does Johnson City have in December?
What are the months with the lowest UV index in Johnson City?
How high is the UV index in December in Johnson City?
Average temperature in December
Johnson City, TN
- Average high temperature in December: 46.6°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (41.5°F).
- Average low temperature in December: 32.4°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).
Average pressure in December
Johnson City, TN
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in December
Johnson City, TN
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in December
Johnson City, TN
- Average humidity in December: 79%
The months with the highest relative humidity are February and December (79%).
The month with the lowest relative humidity is November (75%).
Average rainfall in December
Johnson City, TN
- Average rainfall in December: 3.07"
The wettest month (with the highest rainfall) is February (3.27").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in December
Johnson City, TN
- Average rainfall days in December: 13.6 days
The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is November (11.2 days).
Average snowfall in December
Johnson City, TN
- Average snowfall in December: 3.74"
The month with the highest snowfall is December (3.74").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Johnson City, TN
- Average snowfall days in December: 6.2 days
The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Johnson City, TN
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 5h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in December
Johnson City, TN
- Average sunshine days in December: 13.2 days
The month with the most sunshine days is October (16.5 days).
The month with the least sunshine days is July (8.3 days).
Average UV index in December
Johnson City, TN
- 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 and December (UV index 2).
Average cloud cover in December
Johnson City, TN
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 52).
The months with the least cloud cover are June and August (Cloud cover 31).
Average visibility in December
Johnson City, TN
- Average visibility in December: 5mi
The months with the highest visibility are April, June, July, October and November (6mi).
The months with the lowest visibility are January, February, March, May, August, September and December (5mi).
Johnson City, Tennessee, USA
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