December weather forecast
Lead, SD

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Weather in December

December brings with it the recollection of a full-blown winter in the city of Lead. The weather turns colder compared to November, while January takes the reins of winter from December. The month records an average snowfall of 3.78" (96mm) ushering in the holiday spirit. As the year draws to a close, the city is surrounded by a chilly ambiance and an increase in overcast evenings. It isn't rare to find the city shimmering under a spectacular blanket of snow as the year ends, providing idyllic scenes of winter beauty.

Temperature

December tends to be the coldest month in Lead, with temperatures averaging a daily high of 29.7°F (-1.3°C) and a low of 16.7°F (-8.5°C).

Humidity

In December, the average relative humidity in Lead 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. In Lead, in December, snow falls for 10.1 days, with typically accumulated 3.78" (96mm) of snow. Throughout the year, there are 66.6 snowfall days, and 34.53" (877mm) of snow is accumulated.

Daylight

With an average of 8h and 54min of daylight, December has the shortest days of the year in Lead.
On the first day of the month, sunrise is at 7:11 am and sunset at 4:17 pm. On the last day of December, sunrise is at 7:30 am and sunset at 4:25 pm MST.

Sunshine

The average sunshine in December in Lead is 6h.

UV index

The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
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Frequently asked questions

What is the coldest month in Lead?

Lead reaches its average lowest temperatures in December, measuring 29.7°F (-1.3°C) at the peak and 16.7°F (-8.5°C) at the lowest.

How cold is it in Lead in December?

In Lead, in December, the average high-temperature is 29.7°F (-1.3°C), and the average low-temperature is 16.7°F (-8.5°C). In July, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is computed to be 82.4°F (28°C).

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 Lead, South Dakota, in December, it is raining for 4.2 days, with typically 0.67" (17mm) of accumulated precipitation.

How many days does it snow in December in Lead?

In Lead, during December, snow falls for 10.1 days and regularly aggregates up to 3.78" (96mm) of snow.

What is the month with the shortest days in Lead?

The month with the shortest days is December, with an average of 8h and 54min of daylight.

How many hours of daylight does Lead have in December?

In December, the average day length in Lead, South Dakota, is 8h and 55min.

When are sunrise and sunset in December in Lead?

On the first day of December in Lead, South Dakota, sunrise is at 7:11 am and sunset at 4:17 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:25 pm MST.

How many hours of sunshine does Lead have in December?

In December, the average sunshine duration in Lead, South Dakota, is 6h.

What are the months with the lowest UV index in Lead?

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Lead, South Dakota.

How high is the UV index 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 threat from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
41.9°F 5.5°C
29.7°F -1.3°C
30.6°F -0.8°C
Average low temperature
27°F -2.8°C
16.7°F -8.5°C
17.1°F -8.3°C
Average pressure
30.05" 763mmHg
30.13" 765mmHg
30.14" 766mmHg
Average wind speed
9.4mph 15.1km/h
9.5mph 15.3km/h
9.8mph 15.8km/h
Average max. wind speed
10.2mph 16.4km/h
10.2mph 16.4km/h
10.6mph 17.1km/h
Average wind speed gusts
16.2mph 26.1km/h
17.1mph 27.5km/h
17.3mph 27.8km/h
Average humidity
65%
77%
79%
Average rainfall
0.63" 16mm
0.67" 17mm
0.55" 14mm
Average rainfall days
2.7
4.2
3.7
Average snowfall
3.58" 91mm
3.78" 96mm
2.87" 73mm
Average snowfall days
7.1
10.1
11.7
Average daylight
9h 4min
8h 5min
9h 2min
Average sunshine
6h 3min
6h 0min
6h 0min
Average sunshine days
20.5
19.5
17.8
Average UV index
2
2
2
Average cloud cover
29%
37%
38%
Average visibility
6mi 9.7km
6mi 9.7km
5mi 8km

Average temperature in December
Lead, SD

Average temperature in December - Lead, SD
  • Average high temperature in December: 29.7°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is December (29.7°F).

  • Average low temperature in December: 16.7°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is February (15.4°F).

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Average pressure in December
Lead, SD

Average pressure in December - Lead, 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).

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Average wind speed in December
Lead, SD

Average wind speed in December - Lead, SD
  • Average wind speed in December: 9.5mph

The windiest month (with the highest average wind speed) is October (9.9mph).
The calmest month (with the lowest average wind speed) is August (7.6mph).

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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: 0.67"

The wettest month (with the highest rainfall) is May (1.93").
The driest month (with the least rainfall) is January (0.55").

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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: 3.78"

The month with the highest snowfall is April (6.54").
The months with the least snowfall are July and August (0").

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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: 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: 6h and 0min

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 54min).

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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: 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).

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Lead, South Dakota, USA

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