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
North Spearfish notes the coldest temperatures in December, with a high average of 30.9°F (-0.6°C) and a low of 18.5°F (-7.5°C).Humidity
In December, the average relative humidity is 76%.Rainfall
In North Spearfish, in December, it is raining for 3.5 days, with typically 0.71" (18mm) of accumulated precipitation. In North Spearfish, during the entire year, the rain falls for 99.6 days and collects up to 15.63" (397mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In North Spearfish, in December, snow falls for 9 days, with typically accumulated 4.09" (104mm) of snow. In North Spearfish, during the entire year, snow falls for 56.8 days and aggregates up to 36.3" (922mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 54min of daylight.On the first day of December, sunrise is at 7:12 am and sunset at 4:17 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:25 pm MST.
Sunshine
The average sunshine in December is 5.8h.UV index
January, February, April, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.Note: A maximum high UV index of 2 in December translates into the following recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest in North Spearfish?
How cold is it in December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does North Spearfish have in December?
When is the sunrise / sunset in December?
How many hours of sunshine does North Spearfish have in December?
What are the months with the lowest UV index in North Spearfish?
How high is the UV index in December?
Average temperature in December
North Spearfish, SD
- Average high temperature in December: 30.9°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is December (30.9°F).
- Average low temperature in December: 18.5°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is February (16.2°F).
Average pressure in December
North Spearfish, 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
North Spearfish, SD
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (8mph).
Average humidity in December
North Spearfish, SD
- Average humidity in December: 76%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (49%).
Average rainfall in December
North Spearfish, SD
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is May (2.32").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in December
North Spearfish, SD
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (2.9 days).
Average snowfall in December
North Spearfish, SD
- Average snowfall in December: 4.09"
The month with the highest snowfall is April (7.36").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
North Spearfish, SD
- Average snowfall days in December: 9 days
The month with the highest number of snowfall days is February (11.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
North Spearfish, SD
- Average daylight in December: 8h and 5min
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 5min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days in December
North Spearfish, SD
- Average sunshine days in December: 19.9 days
The month with the most sunshine days is November (20.3 days).
The month with the least sunshine days is May (12.7 days).
Average UV index in December
North Spearfish, SD
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, April, November and December (UV index 2).
Average cloud cover in December
North Spearfish, SD
- Average cloud cover in December: 39
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in December
North Spearfish, 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).
North Spearfish, South Dakota, USA
Weather forecast for your location
2. Allow the app to use your location