December weather forecastLong Lake, SD
December
Weather in December
December, the first month of the winter in Long Lake, is also a subzero cold month, with an average temperature ranging between max 23.7°F (-4.6°C) and min 11.8°F (-11.2°C).Temperature
The onset of December brings a clear temperature shift, with the average high-temperature decreasing from a cold 39.9°F (4.4°C) in November to a freezing cold 23.7°F (-4.6°C). The average temperature during December nights dips to a frigid cold 11.8°F (-11.2°C).Humidity
In December, the average relative humidity is 86%.Rainfall
In December, the rain falls for 2.7 days. Throughout December, 0.59" (15mm) of precipitation is accumulated. In Long Lake, during the entire year, the rain falls for 92.3 days and collects up to 15.28" (388mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. The months with the most snowfall are January and December, with an average 2.76" (70mm) of accumulated snow.Daylight
The month with the shortest days is December, with an average of 8h and 42min of daylight.On the first day of the month, sunrise is at 7:58 am and sunset at 4:53 pm. On the last day of December, in Long Lake, South Dakota, sunrise is at 8:18 am and sunset at 5:02 pm CST.
Sunshine
The average sunshine in December in Long Lake is 4h.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In December, the maximum UV index of 1 translates into these guidelines:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Long Lake, SD
- Average high temperature in December: 23.7°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (19.8°F).
- Average low temperature in December: 11.8°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).
Average pressure in December
Long Lake, SD
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Long Lake, SD
- Average wind speed in December: 10.2mph
The windiest months (with the highest average wind speed) are April and October (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).
Average humidity in December
Long Lake, SD
- Average humidity in December: 86%
The month with the highest relative humidity is January (89%).
The months with the lowest relative humidity are August and September (61%).
Average rainfall in December
Long Lake, SD
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is June (2.83").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in December
Long Lake, SD
- Average rainfall days in December: 2.7 days
The month with the highest number of rainy days is June (14.3 days).
The month with the least rainy days is January (1.7 days).
Average snowfall in December
Long Lake, SD
- Average snowfall in December: 2.76"
The months with the highest snowfall are January and December (2.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Long Lake, SD
- Average snowfall days in December: 11.4 days
The month with the highest number of snowfall days is February (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Long Lake, SD
- Average daylight in December: 8h and 42min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Long Lake, SD
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (13.8 days).
Average UV index in December
Long Lake, SD
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Long Lake, SD
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in December
Long Lake, SD
- Average visibility in December: 6mi
The months with the highest visibility are February, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and March (5mi).
