December weather forecast
Piedmont, SD

Share

Weather in December

December shadows November, completing the weather cycle in Piedmont with intensified cold and snowy conditions. More snowfall can be expected in December with 2.64" (67mm) in approximately 8.1 days. With reduced daylight hours and lowest UV index, it exemplifies the quintessential winter weather. Despite the piercing cold and snow-covered landscape, the festive spirit of the holiday season keeps the city vibrant and alive.

Temperature

December, on average, is the coldest month, registering a high temperature of 32.5°F (0.3°C) and a low of 18.7°F (-7.4°C).

Humidity

In December, the average relative humidity in Piedmont, South Dakota, is 74%.

Rainfall

In Piedmont, in December, it is raining for 4.8 days, with typically 0.63" (16mm) of accumulated precipitation. Throughout the year, there are 118.8 rainfall days, and 15.39" (391mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Piedmont, South Dakota, are January through May, September through December. In Piedmont, in December, snow falls for 8.1 days, with typically accumulated 2.64" (67mm) of snow. Throughout the year, there are 50.4 snowfall days, and 24.41" (620mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 8h and 54min of daylight.
On the first day of December in Piedmont, sunrise is at 7:09 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:24 pm MST.

Sunshine

In Piedmont, the average sunshine in December is 6h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Stay sun-safe with clothing that is both closely woven and worn loosely. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
[Resources]

Frequently asked questions

What is the coldest month in Piedmont?

With average high and low temperatures of 32.5°F (0.3°C) and 18.7°F (-7.4°C) respectively, December is Piedmont's coldest month.

How cold is it in Piedmont in December?

The average high-temperature and low-temperature during December are 32.5°F (0.3°C) and 18.7°F (-7.4°C) respectively. In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, is calculated to be 84.2°F (29°C).

What is the average humidity in December in Piedmont?

In Piedmont, the average relative humidity in December is 74%.

How many days does it rain in December in Piedmont?

In Piedmont, in December, it is raining for 4.8 days, with typically 0.63" (16mm) of accumulated precipitation.

How many days does it snow in December in Piedmont?

In Piedmont, in December, during 8.1 snowfall days, 2.64" (67mm) of snow is typically accumulated.

What is the month with the shortest days in Piedmont?

With an average of 8h and 54min of daylight, December has the shortest days of the year in Piedmont, South Dakota.

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

The average day length in December is 8h and 56min.

What time are sunrise and sunset in December in Piedmont?

On the first day of December in Piedmont, South Dakota, sunrise is at 7:09 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:24 pm MST.

How many hours of sunshine does Piedmont have in December?

The average sunshine duration in December is 6h.

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

The months with the lowest UV index in Piedmont, South Dakota, are January, February, November and December, with an average maximum UV index of 2.

How high is the UV index in December in Piedmont?

In December, the average daily maximum UV index in Piedmont, South Dakota, is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Piedmont, SD

Average temperature in December - Piedmont, SD
  • Average high temperature in December: 32.5°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (32.5°F).

  • Average low temperature in December: 18.7°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is February (17.8°F).

[Resources]

Average pressure in December
Piedmont, SD

Average pressure in December - Piedmont, 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).

[Resources]

Average wind speed in December
Piedmont, SD

Average wind speed in December - Piedmont, SD
  • Average wind speed in December: 8.9mph

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).

[Resources]

Average humidity in December
Piedmont, SD

Average humidity in December - Piedmont, SD
  • Average humidity in December: 74%

The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are August and September (50%).

[Resources]

Average rainfall in December
Piedmont, SD

Average rainfall in December - Piedmont, SD
  • Average rainfall in December: 0.63"

The wettest month (with the highest rainfall) is May (2.28").
The driest month (with the least rainfall) is January (0.43").

[Resources]

Average rainfall days in December
Piedmont, SD

Average rainfall days in December - Piedmont, SD
  • Average rainfall days in December: 4.8 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is December (4.8 days).

[Resources]

Average snowfall in December
Piedmont, SD

Average snowfall in December - Piedmont, SD
  • Average snowfall in December: 2.64"

The month with the highest snowfall is April (5.43").
The months with the least snowfall are June, July and August (0").

[Resources]

Average snowfall days in December
Piedmont, SD

Average snowfall days in December - Piedmont, SD
  • Average snowfall days in December: 8.1 days

The month with the highest number of snowfall days is February (10.5 days).
The months with the least snowfall days are June, July and August (0 days).

[Resources]

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

Average daylight in December / Average sunshine in December - Piedmont, 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 48min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).

[Resources]

Average sunshine days in December
Piedmont, SD

Average sunshine days in December - Piedmont, SD
  • Average sunshine days in December: 19.6 days

The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (11 days).

[Resources]

Average UV index in December
Piedmont, SD

Average UV index in December - Piedmont, SD
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

[Resources]

Average cloud cover in December
Piedmont, SD

Average cloud cover in December - Piedmont, SD
  • Average cloud cover in December: 36

The months with the most cloud cover are February and April (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 16).

[Resources]

Average visibility in December
Piedmont, SD

Average visibility in December - Piedmont, 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).

[Resources]

Piedmont, South Dakota, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location