December weather forecast
Timber Lake, SD

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Weather in December

December marks the full force of the winter season in Timber Lake, painting the town white with snow. The winter chill becomes a constant, limiting outdoor activity and encouraging cozy indoor gatherings instead. With temperatures dropping from 14.4°F (-9.8°C) to 25.7°F (-3.5°C), the streets are blanketed in a fresh layer of snow. Come December, the city turns into a frosty paradise, offering ample opportunities to engage in winter sports. The month brings Timber Lake's weather full circle, ending the year on a wintry, yet festive note.

Temperature

The start of December is characterized by a significant decrease in the average high-temperature, moving from a cold 41.5°F (5.3°C) in November to a freezing cold 25.7°F (-3.5°C). Timber Lake, during December nights, observes an average temperature of 14.4°F (-9.8°C).

Humidity

In December, the average relative humidity is 83%.

Rainfall

In Timber Lake, during December, the rain falls for 2.7 days and regularly aggregates up to 0.67" (17mm) of precipitation. Throughout the year, there are 89.4 rainfall days, and 15.39" (391mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Timber Lake, in December, snow falls for 9.5 days, with typically accumulated 3.39" (86mm) of snow. In Timber Lake, during the entire year, snow falls for 49.4 days and aggregates up to 19.09" (485mm) of snow.

Daylight

December has the shortest days of the year, with an average of 8h and 48min of daylight.
On the first day of December, sunrise is at 7:04 am and sunset at 4:02 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:11 pm MST.

Sunshine

In Timber Lake, the average sunshine in December is 4.5h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, a regular UV index of 1 translates into these guidelines:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Avoiding the Sun during its peak radiation time around midday is a healthy practice. To cut down UV radiation exposure by about half, sport a wide-brim hat. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Updated: Aug 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

In December, in Timber Lake, the average high-temperature is 25.7°F (-3.5°C), and the average low-temperature is 14.4°F (-9.8°C). In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 86°F (30°C).

What is the average humidity in December?

In Timber Lake, the average relative humidity in December is 83%.

How many days does it rain in December?

In December, in Timber Lake, the rain falls for 2.7 days. Throughout December, 0.67" (17mm) of precipitation is accumulated.

How much does it snow in December?

In Timber Lake, South Dakota, in December, during 9.5 snowfall days, 3.39" (86mm) of snow is typically accumulated.

What is the month with the shortest days in Timber Lake?

With an average of 8h and 48min of daylight, December has the shortest days of the year.

How many hours of daylight does Timber Lake have in December?

In Timber Lake, the average day length in December is 8h and 47min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:04 am and sunset at 4:02 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:11 pm MST.

How many hours of sunshine does Timber Lake have in December?

In Timber Lake, the average sunshine duration in December is 4.5h.

What is the month with the lowest UV index?

The months with the lowest UV index are January and December, with an average maximum UV index of 1.

How high is the UV index in December?

The average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to Sun's UV rays.
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
Timber Lake, SD

Average temperature in December - Timber Lake, SD
  • Average high temperature in December: 25.7°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (23°F).

  • Average low temperature in December: 14.4°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (9°F).

Average pressure in December
Timber Lake, SD

Average pressure in December - Timber Lake, SD
  • Average pressure in December: 30.13"Hg

The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in December
Timber Lake, SD

Average wind speed in December - Timber Lake, SD
  • Average wind speed in December: 9.9mph

The windiest month (with the highest average wind speed) is April (11.5mph).
The calmest month (with the lowest average wind speed) is February (9.4mph).

Average humidity in December
Timber Lake, SD

Average humidity in December - Timber Lake, SD
  • Average humidity in December: 83%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (52%).

Average rainfall in December
Timber Lake, SD

Average rainfall in December - Timber Lake, SD
  • Average rainfall in December: 0.67"

The wettest month (with the highest rainfall) is June (2.32").
The driest month (with the least rainfall) is January (0.47").

Average rainfall days in December
Timber Lake, SD

Average rainfall days in December - Timber Lake, SD
  • Average rainfall days in December: 2.7 days

The month with the highest number of rainy days is June (13.8 days).
The month with the least rainy days is February (1.3 days).

Average snowfall in December
Timber Lake, SD

Average snowfall in December - Timber Lake, SD
  • Average snowfall in December: 3.39"

The month with the highest snowfall is February (3.98").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Timber Lake, SD

Average snowfall days in December - Timber Lake, SD
  • Average snowfall days in December: 9.5 days

The month with the highest number of snowfall days is January (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
Timber Lake, SD

Average daylight in December / Average sunshine in December - Timber Lake, SD
  • Average daylight in December: 8h and 5min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in December: 4h and 3min

The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

Average sunshine days in December
Timber Lake, SD

Average sunshine days in December - Timber Lake, SD
  • Average sunshine days in December: 20.1 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (13.6 days).

Average UV index in December
Timber Lake, SD

Average UV index in December - Timber Lake, SD
  • Average UV index in December: 1

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in December
Timber Lake, SD

Average cloud cover in December - Timber Lake, SD
  • Average cloud cover in December: 52

The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 21).

Average visibility in December
Timber Lake, SD

Average visibility in December - Timber Lake, 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).

Timber Lake, South Dakota, USA

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