December weather forecastNisland, SD
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Nisland, South Dakota, with an average temperature fluctuating between 18.1°F (-7.7°C) and 30.4°F (-0.9°C).Temperature
December brings the lowest temperatures, with an average high of 30.4°F (-0.9°C) and an average low of 18.1°F (-7.7°C).Humidity
In December, the average relative humidity in Nisland is 78%.Rainfall
In Nisland, South Dakota, in December, it is raining for 3.5 days, with typically 0.59" (15mm) of accumulated precipitation. In Nisland, South Dakota, during the entire year, the rain falls for 100 days and collects up to 12.83" (326mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In December, in Nisland, South Dakota, it is snowing for 9.4 days. Throughout December, 2.95" (75mm) of snow is accumulated. In Nisland, South Dakota, during the entire year, snow falls for 52.1 days and aggregates up to 23.54" (598mm) of snow.Daylight
The month with the shortest days in Nisland is December, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 7:11 am and sunset at 4:15 pm. On the last day of December, sunrise is at 7:31 am and sunset at 4:23 pm MST.
Sunshine
In December, the average sunshine is 5.8h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 2 during December leads to these advisories:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Nisland, SD
- Average high temperature in December: 30.4°F
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is December (30.4°F).
- Average low temperature in December: 18.1°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is February (17.1°F).
Average pressure in December
Nisland, SD
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Nisland, SD
- Average wind speed in December: 10.1mph
The windiest months (with the highest average wind speed) are January and October (10.4mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).
Average humidity in December
Nisland, SD
- Average humidity in December: 78%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (47%).
Average rainfall in December
Nisland, SD
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in December
Nisland, SD
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in December
Nisland, SD
- Average snowfall in December: 2.95"
The month with the highest snowfall is April (4.88").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Nisland, SD
- Average snowfall days in December: 9.4 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Nisland, SD
- Average daylight in December: 8h and 54min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 5h and 48min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).
Average sunshine days in December
Nisland, SD
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is April (12.6 days).
Average UV index in December
Nisland, SD
- 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, November and December (UV index 2).
Average cloud cover in December
Nisland, SD
- Average cloud cover in December: 40
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in December
Nisland, 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).
