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
A shift in Eureka's weather is noticeable as November turns into December, with the average high temperature decreasing from a cold 41.5°F (5.3°C) to a freezing cold 25.7°F (-3.5°C). Eureka records an average nighttime low of 14.4°F (-9.8°C) in December.Humidity
In Eureka, the average relative humidity in December is 83%.Rainfall
In Eureka, in December, during 2.7 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. Throughout the year, in Eureka, there are 89.4 rainfall days, and 15.39" (391mm) of precipitation is accumulated.Snowfall
Months with snowfall in Eureka are January through May, October through December. In December, it is snowing for 9.5 days. Throughout December, 3.39" (86mm) of snow is accumulated. Throughout the year, in Eureka, there are 49.4 snowfall days, and 19.09" (485mm) of snow is accumulated.Daylight
December has the shortest days of the year in Eureka, South Dakota, with an average of 8h and 42min of daylight.On the first day of December, sunrise is at 7:59 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 8:19 am and sunset at 5:04 pm CST.
Sunshine
The average sunshine in December is 4.5h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Eureka. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the maximum UV index of 1 transforms into these recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Eureka in December?
What is the average humidity in December in Eureka?
How much does it rain in Eureka in December?
How many days does it snow in December in Eureka?
What is the month with the shortest days in Eureka?
What is the average length of the day in December in Eureka?
When are sunrise and sunset in December in Eureka?
How many hours of sunshine does Eureka have in December?
What are the months with the lowest UV index in Eureka?
How high is the UV index in December in Eureka?
Average temperature in December
Eureka, SD
- Average high temperature in December: 25.7°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (23°F).
- Average low temperature in December: 14.4°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 (9°F).
Average pressure in December
Eureka, SD
- Average pressure in December: 30.13"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Eureka, SD
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is April (11.5mph).
The calmest month (with the lowest average wind speed) is February (9.4mph).
Average humidity in December
Eureka, SD
- Average humidity in December: 83%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (52%).
Average rainfall in December
Eureka, SD
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is June (2.32").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in December
Eureka, SD
- Average rainfall days in December: 2.7 days
The month with the highest number of rainy days is June (13.8 days).
The month with the least rainy days is February (1.3 days).
Average snowfall in December
Eureka, SD
- Average snowfall in December: 3.39"
The month with the highest snowfall is February (3.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Eureka, SD
- Average snowfall days in December: 9.5 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Eureka, SD
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 4h and 3min
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 6min).
Average sunshine days in December
Eureka, SD
- Average sunshine days in December: 20.1 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (13.6 days).
Average UV index in December
Eureka, SD
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Eureka, SD
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 21).
Average visibility in December
Eureka, SD
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Eureka, South Dakota, USA
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