December weather forecast
Lead, SD

Weather in December

December, the first month of the winter, in Lead, is still a freezing cold month, with average temperature fluctuating between 16.7°F (-8.5°C) and 29.7°F (-1.3°C).

Temperature

With an average high-temperature of 29.7°F (-1.3°C) and an average low-temperature of 16.7°F (-8.5°C), December is the coldest month.

Humidity

The average relative humidity in December is 77%.

Rainfall

In Lead, in December, it is raining for 4.2 days, with typically 0.67" (17mm) of accumulated precipitation. In Lead, during the entire year, the rain falls for 96.1 days and collects up to 14.02" (356mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall. In Lead, during 10.1 snowfall days, 3.78" (96mm) of snow is typically accumulated. In Lead, during the entire year, snow falls for 66.6 days, and aggregates up to 34.53" (877mm) of snow.

Daylight

December has the shortest days of the year in Lead, with an average of 8.9h of daylight.

Sunshine

In Lead, the average sunshine is 6h.

UV index

January through March, October through 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 minimal health vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Lead?

With an average high-temperature of 29.7°F (-1.3°C) and an average low-temperature of 16.7°F (-8.5°C), December is the coldest month in Lead.

What is the average humidity in December in Lead?

In Lead, the average relative humidity in December is 77%.

How many days does it rain in December in Lead?

In December, in Lead, the rain falls for 4.2 days. Throughout December, 0.67" (17mm) of precipitation is accumulated.

How many days does it snow in December in Lead?

In December, it is snowing for 10.1 days. Throughout December, 3.78" (96mm) of snow is accumulated.

What is the month with the shortest days in Lead?

With an average of 8.9h of daylight, December has the shortest days of the year in Lead, South Dakota.

What is the average length of the day in December in Lead?

In December, the average length of the day in Lead, South Dakota, is 8.9h.

How long on average sun shines in December in Lead?

The average sunshine in December is 6h.

What is the month with the lowest UV index in Lead?

Months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2.

What is the UV index intensity in December in Lead?

In Lead, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to the UV radiation.

Average temperature in December
Lead, SD

Average temperature in December - Lead, SD
  • Average high temperature in December: -1.3°C

The warmest month (with the highest average high temperature) is July (27.7°C).
The month with the lowest average high temperature is December (-1.3°C).

  • Average low temperature in December: -8.5°C

The month with the highest average low temperature is July (15.8°C).
The coldest month (with the lowest average low temperature) is February (-9.2°C).

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Average pressure in December
Lead, SD

Average pressure in December - Lead, SD
  • Average pressure in December: 1020.2mbar

The month with the highest atmospheric pressure is January (1020.5mbar).
The month with the lowest atmospheric pressure is June (1010.6mbar).

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Average wind speed in December
Lead, SD

Average wind speed in December - Lead, SD
  • Average wind speed in December: 15.3km/h

The windiest month (with the highest average wind speed) is October (16km/h).
The calmest month (with the lowest average wind speed) is August (12.3km/h).

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Average humidity in December
Lead, SD

Average humidity in December - Lead, SD
  • Average humidity in December: 77%

The months with the highest relative humidity are January and February (79%).
The months with the lowest relative humidity are August and September (51%).

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Average rainfall in December
Lead, SD

Average rainfall in December - Lead, SD
  • Average rainfall in December: 17mm

The wettest month (with the highest rainfall) is May (49mm).
The driest month (with the least rainfall) is January (14mm).

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Average rainfall days in December
Lead, SD

Average rainfall days in December - Lead, SD
  • Average rainfall days in December: 4.2 days

The month with the highest number of rainy days is June (14.2 days).
The month with the least rainy days is November (2.7 days).

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Average snowfall in December
Lead, SD

Average snowfall in December - Lead, SD
  • Average snowfall in December: 96mm

The month with the highest snowfall is April (166mm).
The months with the least snowfall are July and August (0mm).

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Average snowfall days in December
Lead, SD

Average snowfall days in December - Lead, SD
  • Average snowfall days in December: 10.1 days

The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in December /
Average sunshine in December
Lead, SD

Average daylight in December / Average sunshine in December - Lead, SD
  • Average daylight in December: 8.9h

The month with the longest days is June (Average daylight: 15.5h).
The month with the shortest days is December (Average daylight: 8.9h).

  • Average sunshine in December: 6h

The month with the most sunshine is August (Average sunshine: 11.7h).
The month with the least sunshine is February (Average sunshine: 5.9h).

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Average sunshine days in December
Lead, SD

Average sunshine days in December - Lead, SD
  • Average sunshine days in December: 19.5 days

The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is June (12.3 days).

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Average UV index in December
Lead, SD

Average UV index in December - Lead, 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, March, October, November and December (UV index 2).

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Average cloud cover in December
Lead, SD

Average cloud cover in December - Lead, SD
  • Average cloud cover in December: 37

The months with the most cloud cover are February and April (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 16).

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Average visibility in December
Lead, SD

Average visibility in December - Lead, SD
  • Average visibility in December: 9km

The months with the highest visibility are June, July, August and September (10km).
The month with the lowest visibility is January (8km).

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