December weather forecastPorcupine, SD
December
Weather in December
The first month of the winter, December, is also a wintry month in Porcupine, South Dakota, with temperature in the range of an average high of 32.4°F (0.2°C) and an average low of 18.7°F (-7.4°C).Temperature
Porcupine's temperature records reveal December as the coldest month, marked by average highs of 32.4°F (0.2°C) and lows of 18.7°F (-7.4°C).Humidity
The average relative humidity in December in Porcupine, South Dakota, is 76%.Rainfall
In Porcupine, in December, it is raining for 2.5 days, with typically 0.87" (22mm) of accumulated precipitation. Throughout the year, there are 86.7 rainfall days, and 13.66" (347mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Porcupine. In Porcupine, in December, during 8.2 snowfall days, 3.9" (99mm) of snow is typically accumulated. Throughout the year, there are 47.4 snowfall days, and 22.72" (577mm) of snow is accumulated.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year in Porcupine, South Dakota.On the first day of December in Porcupine, South Dakota, sunrise is at 7:02 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:24 pm MST.
Sunshine
In Porcupine, the average sunshine in December is 5.7h.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 value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Porcupine, SD
- Average high temperature in December: 32.4°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is December (32.4°F).
- Average low temperature in December: 18.7°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 (18.1°F).
Average pressure in December
Porcupine, SD
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Porcupine, SD
- Average wind speed in December: 10.4mph
The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (10.2mph).
Average humidity in December
Porcupine, SD
- Average humidity in December: 76%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (48%).
Average rainfall in December
Porcupine, SD
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in December
Porcupine, SD
- Average rainfall days in December: 2.5 days
The month with the highest number of rainy days is May (13.1 days).
The months with the least rainy days are February and December (2.5 days).
Average snowfall in December
Porcupine, SD
- Average snowfall in December: 3.9"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Porcupine, SD
- Average snowfall days in December: 8.2 days
The month with the highest number of snowfall days is February (11.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Porcupine, 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 42min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in December
Porcupine, SD
- Average sunshine days in December: 20.8 days
The month with the most sunshine days is September (22.8 days).
The month with the least sunshine days is April (13.2 days).
Average UV index in December
Porcupine, SD
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Porcupine, SD
- Average cloud cover in December: 39
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in December
Porcupine, 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).
