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
December marks a gentle change in average high-temperature, declining from November's moderate 57.2°F (14°C) to a frosty 49.5°F (9.7°C). December generally records an average low-temperature of 35.2°F (1.8°C).Humidity
December is the most humid month, with an average relative humidity of 79%.Rainfall
In Duncan, in December, it is raining for 11.1 days, with typically 1.54" (39mm) of accumulated precipitation. Throughout the year, there are 148.2 rainfall days, and 18.23" (463mm) of precipitation is accumulated.Snowfall
January through March, October through December are months with snowfall in Duncan. In December, it is snowing for 3.6 days. Throughout December, 0.63" (16mm) of snow is accumulated. In Duncan, during the entire year, snow falls for 18.9 days and aggregates up to 3.58" (91mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 48min of daylight.On the first day of December in Duncan, sunrise is at 7:28 am and sunset at 5:22 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 5:32 pm EST.
Sunshine
In December, the average sunshine is 5.2h.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 estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.Note: The UV index of 2 during December translates into the following guidance:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Frequently asked questions
What are the temperatures in Duncan in December?
What is the most humid month in Duncan?
What is the average humidity in December in Duncan?
How much does it rain in Duncan in December?
How much does it snow in Duncan in December?
What is the month with the shortest days in Duncan?
How many hours of daylight does Duncan have in December?
What time are sunrise and sunset in December in Duncan?
How long on average sun shines in December in Duncan?
When is the lowest UV index in Duncan?
How high is the UV index in December in Duncan?
Average temperature in December
Duncan, TN
- Average high temperature in December: 49.5°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (44.8°F).
- Average low temperature in December: 35.2°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).
Average pressure in December
Duncan, TN
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in December
Duncan, TN
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in December
Duncan, TN
- Average humidity in December: 79%
The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is August (72%).
Average rainfall in December
Duncan, TN
- Average rainfall in December: 1.54"
The wettest month (with the highest rainfall) is July (2.2").
The driest month (with the least rainfall) is September (0.94").
Average rainfall days in December
Duncan, TN
- Average rainfall days in December: 11.1 days
The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is November (8.7 days).
Average snowfall in December
Duncan, TN
- Average snowfall in December: 0.63"
The month with the highest snowfall is February (0.98").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in December
Duncan, TN
- Average snowfall days in December: 3.6 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
Duncan, TN
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in December
Duncan, TN
- Average sunshine days in December: 17 days
The month with the most sunshine days is November (19.3 days).
The months with the least sunshine days are February and July (12.5 days).
Average UV index in December
Duncan, 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
Duncan, TN
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in December
Duncan, TN
- Average visibility in December: 6mi
The months with the highest visibility are April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and March (5mi).
Duncan, Tennessee, USA
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