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
As November transitions into December, Dallas sees a clear drop in the average high-temperature, declining from a chilly 46.6°F (8.1°C) to a freezing cold 31.1°F (-0.5°C). Dallas throughout December, records an average low-temperature of 18.3°F (-7.6°C).Humidity
In December, the average relative humidity in Dallas is 79%.Rainfall
In December, in Dallas, the rain falls for 3.5 days. Throughout December, 0.79" (20mm) of precipitation is accumulated. In Dallas, during the entire year, the rain falls for 103.9 days and collects up to 16.85" (428mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. The month with the most snowfall is December, when snow falls for 8 days and typically aggregates up to 3.19" (81mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:51 am and sunset at 5:03 pm. On the last day of December, sunrise is at 8:10 am and sunset at 5:12 pm CST.
Sunshine
In December, the average sunshine in Dallas is 5.2h.UV index
The month with the lowest UV index in Dallas, South Dakota, is December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In December, a regular UV index of 1 translates into these guidelines:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Frequently asked questions
How cold is it in Dallas in December?
What is the average humidity in December in Dallas?
How many days does it rain in December in Dallas?
What is the snowiest month in Dallas?
How many days does it snow in December in Dallas?
What is the month with the shortest days in Dallas?
What is the average length of the day in December in Dallas?
What time are sunrise and sunset in December in Dallas?
How many hours of sunshine does Dallas have in December?
What is the month with the lowest UV index in Dallas?
What is the UV index reading in December in Dallas?
Average temperature in December
Dallas, SD
- Average high temperature in December: 31.1°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in December: 18.3°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure in December
Dallas, SD
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Dallas, SD
- Average wind speed in December: 10.9mph
The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest month (with the lowest average wind speed) is August (9.8mph).
Average humidity in December
Dallas, SD
- Average humidity in December: 79%
The month with the highest relative humidity is January (82%).
The months with the lowest relative humidity are August and September (57%).
Average rainfall in December
Dallas, SD
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is June (2.8").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in December
Dallas, SD
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is June (15.3 days).
The months with the least rainy days are January and February (2.7 days).
Average snowfall in December
Dallas, SD
- Average snowfall in December: 3.19"
The month with the highest snowfall is December (3.19").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Dallas, SD
- Average snowfall days in December: 8 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Dallas, SD
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in December
Dallas, SD
- Average sunshine days in December: 20.2 days
The month with the most sunshine days is November (20.8 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in December
Dallas, SD
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Dallas, SD
- Average cloud cover in December: 44
The month with the most cloud cover is January (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 20).
Average visibility in December
Dallas, SD
- 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).
Dallas, South Dakota, USA
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