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
The coldest period tends to be December, when average temperatures fluctuate between a high of 30.9°F (-0.6°C) and a low of 18.5°F (-7.5°C).Humidity
In North Spearfish, the average relative humidity in December is 76%.Rainfall
In December, in North Spearfish, South Dakota, the rain falls for 3.5 days. Throughout December, 0.71" (18mm) of precipitation is accumulated. Throughout the year, in North Spearfish, there are 99.6 rainfall days, and 15.63" (397mm) of precipitation is accumulated.Snowfall
Months with snowfall in North Spearfish, South Dakota, are January through May, September through December. In North Spearfish, in December, during 9 snowfall days, 4.09" (104mm) of snow is typically accumulated. Throughout the year, in North Spearfish, there are 56.8 snowfall days, and 36.3" (922mm) of snow is accumulated.Daylight
December has the shortest days of the year in North Spearfish, with an average of 8h and 54min of daylight.On the first day of December in North Spearfish, South Dakota, 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
In December, the average sunshine 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 in North Spearfish. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A daily high UV index of 2 in December leads to these guidelines:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
What time of the year is the coldest in North Spearfish?
How cold is December in North Spearfish?
What is the average humidity in December in North Spearfish?
How many days does it rain in December in North Spearfish?
How many days does it snow in December in North Spearfish?
What is the month with the shortest days in North Spearfish?
How many hours of daylight does North Spearfish have in December?
When are sunrise and sunset in December in North Spearfish?
How many hours of sunshine does North Spearfish have in December?
When is the lowest UV index in North Spearfish?
What is the UV index reading in December in North Spearfish?
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
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