December weather forecastSaint Lawrence, SD
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Saint Lawrence, South Dakota, with an average temperature varying between 26.8°F (-2.9°C) and 14.9°F (-9.5°C).Temperature
The start of December is characterized by a significant decrease in the average high-temperature, moving from a chilly 43.7°F (6.5°C) in November to a subzero cold 26.8°F (-2.9°C). Saint Lawrence, during December nights, observes an average temperature of 14.9°F (-9.5°C).Humidity
In December, the average relative humidity is 83%.Rainfall
In Saint Lawrence, in December, it is raining for 2.5 days, with typically 0.75" (19mm) of accumulated precipitation. Throughout the year, in Saint Lawrence, there are 97.3 rainfall days, and 16.73" (425mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Saint Lawrence, in December, snow falls for 10 days, with typically accumulated 2.4" (61mm) of snow. Throughout the year, in Saint Lawrence, there are 47.1 snowfall days, and 16.06" (408mm) of snow is accumulated.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year in Saint Lawrence.On the first day of the month, sunrise is at 7:52 am and sunset at 4:57 pm. On the last day of December, sunrise is at 8:12 am and sunset at 5:06 pm CST.
Sunshine
In Saint Lawrence, the average sunshine in December is 4.4h.UV index
In December, the average daily maximum UV index in Saint Lawrence is 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: An average UV index of 2 in December transforms into this advice:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Saint Lawrence, SD
- Average high temperature in December: 26.8°F
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (23.4°F).
- Average low temperature in December: 14.9°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (9.1°F).
Average pressure in December
Saint Lawrence, 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
Saint Lawrence, SD
- Average wind speed in December: 10.5mph
The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is August (8.9mph).
Average humidity in December
Saint Lawrence, SD
- Average humidity in December: 83%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is September (60%).
Average rainfall in December
Saint Lawrence, SD
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is July (3.07").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in December
Saint Lawrence, SD
- Average rainfall days in December: 2.5 days
The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is February (1.3 days).
Average snowfall in December
Saint Lawrence, SD
- Average snowfall in December: 2.4"
The month with the highest snowfall is February (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Saint Lawrence, SD
- Average snowfall days in December: 10 days
The months with the highest number of snowfall days are January and February (10.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Saint Lawrence, 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: 4h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Saint Lawrence, SD
- Average sunshine days in December: 20 days
The month with the most sunshine days is November (22.1 days).
The month with the least sunshine days is June (12.4 days).
Average UV index in December
Saint Lawrence, SD
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in December
Saint Lawrence, SD
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 24).
Average visibility in December
Saint Lawrence, 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).
