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
Witnessing a clear downswing, the average high-temperature during December drops from November's chilly 45.9°F (7.7°C) to a freezing cold 30.7°F (-0.7°C). In McCook Lake, the average nighttime temperature during December is a still subzero cold 18.7°F (-7.4°C).Humidity
The average relative humidity in December is 81%.Rainfall
In McCook Lake, during December, the rain falls for 4.1 days and regularly aggregates up to 1.22" (31mm) of precipitation. In McCook Lake, during the entire year, the rain falls for 122 days and collects up to 21.61" (549mm) of precipitation.Snowfall
Months with snowfall in McCook Lake are January through May, October through December. In December, it is snowing for 8.4 days. Throughout December, 2.56" (65mm) of snow is accumulated. Throughout the year, there are 38 snowfall days, and 13.23" (336mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:36 am and sunset at 4:53 pm. On the last day of December, sunrise is at 7:55 am and sunset at 5:03 pm CST.
Sunshine
In McCook Lake, South Dakota, the average sunshine in December is 4.8h.UV index
The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Frequently asked questions
How cold is December in McCook Lake?
What is the average humidity in December in McCook Lake?
How many days does it rain in December in McCook Lake?
How many days does it snow in December in McCook Lake?
What is the month with the shortest days in McCook Lake?
How many hours of daylight does McCook Lake have in December?
When is the sunrise / sunset in December in McCook Lake?
How long on average sun shines in December in McCook Lake?
What is the UV index intensity in December in McCook Lake?
Average temperature in December
McCook Lake, SD
- Average high temperature in December: 30.7°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in December: 18.7°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure in December
McCook Lake, SD
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in December
McCook Lake, SD
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in December
McCook Lake, SD
- Average humidity in December: 81%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (65%).
Average rainfall in December
McCook Lake, SD
- Average rainfall in December: 1.22"
The wettest months (with the highest rainfall) are May and June (3.03").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in December
McCook Lake, SD
- Average rainfall days in December: 4.1 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in December
McCook Lake, SD
- Average snowfall in December: 2.56"
The month with the highest snowfall is January (2.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
McCook Lake, SD
- Average snowfall days in December: 8.4 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
McCook Lake, SD
- Average daylight in December: 9h and 1min
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 6min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in December
McCook Lake, SD
- Average sunshine days in December: 20.1 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is June (9.7 days).
Average UV index in December
McCook Lake, SD
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
McCook Lake, SD
- Average cloud cover in December: 48
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in December
McCook Lake, 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).
McCook Lake, South Dakota, USA
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