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 commencement of December includes a gentle temperature shift, with the average high-temperature dropping a bit from a moderate 56.7°F (13.7°C) in November to a frosty 48.9°F (9.4°C). An average nighttime temperature of 35.2°F (1.8°C) is noted during the month of December.Humidity
March and December, with an average relative humidity of 79%, are the most humid months.Rainfall
In Watertown, in December, it is raining for 13.3 days, with typically 3.03" (77mm) of accumulated precipitation. Throughout the year, there are 182.4 rainfall days, and 39.8" (1011mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Watertown, Tennessee, in December, during 2.6 snowfall days, 0.55" (14mm) of snow is typically accumulated. In Watertown, during the entire year, snow falls for 16.1 days and aggregates up to 3.66" (93mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 48min of daylight.On the first day of December, sunrise is at 6:37 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 4:40 pm CST.
Sunshine
The average sunshine in December is 4.7h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In December, an average UV index of 2 transforms into the following instructions:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures?
What are the most humid months?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Watertown have in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Watertown have in December?
When is the lowest UV index in Watertown?
What is the UV index reading in December?
Average temperature in December
Watertown, TN
- Average high temperature in December: 48.9°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (43.9°F).
- Average low temperature in December: 35.2°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (30°F).
Average pressure in December
Watertown, TN
- Average pressure in December: 30.15"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in December
Watertown, TN
- Average wind speed in December: 7.1mph
The windiest month (with the highest average wind speed) is February (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.4mph).
Average humidity in December
Watertown, TN
- Average humidity in December: 79%
The months with the highest relative humidity are March and December (79%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in December
Watertown, TN
- Average rainfall in December: 3.03"
The wettest month (with the highest rainfall) is July (4.92").
The driest month (with the least rainfall) is November (2.24").
Average rainfall days in December
Watertown, TN
- Average rainfall days in December: 13.3 days
The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is November (11 days).
Average snowfall in December
Watertown, TN
- Average snowfall in December: 0.55"
The month with the highest snowfall is January (1.02").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Watertown, TN
- Average snowfall days in December: 2.6 days
The month with the highest number of snowfall days is January (5.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Watertown, TN
- Average daylight in December: 9h and 5min
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 48min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Watertown, TN
- Average sunshine days in December: 15.3 days
The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is July (9.2 days).
Average UV index in December
Watertown, TN
- Average UV index in December: 2
The months with the highest UV index are May, 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
Watertown, TN
- Average cloud cover in December: 51
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in December
Watertown, TN
- 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).
Watertown, Tennessee, USA
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