December weather forecast and climate
Basin, WY

Weather in December

The first month of the winter, December, is also a subzero cold month in Basin, Wyoming, with average temperature varying between 14.2°F (-9.9°C) and 28.8°F (-1.8°C).

Temperature

With an average high-temperature of 28.8°F (-1.8°C) and an average low-temperature of 14.2°F (-9.9°C), December is the coldest month.

Humidity

The average relative humidity in Basin, Wyoming, is 73%.

Rainfall

The month with the least rainfall is December when the rain falls for 6.5 days and typically collects 0.2" (5mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Basin. In Basin, during 7.5 snowfall days, 1.3" (33mm) of snow is typically accumulated. Throughout the year, there are 41.4 snowfall days, and 9.41" (239mm) of snow is accumulated.

Daylight

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

Sunshine

In Basin, the average sunshine is 7h.

UV index

Months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 2 interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. 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 Basin?

December is the coldest month, with an average high-temperature of 28.8°F (-1.8°C) and an average low-temperature of 14.2°F (-9.9°C).

What is the average humidity in December in Basin?

In Basin, the average relative humidity in December is 73%.

What is the driest month in Basin?

The month with the least rainfall is December when the rain falls for 6.5 days and typically collects 0.2" (5mm) of precipitation.

How many days does it rain in December in Basin?

In Basin, in December, it is raining for 6.5 days, with typically 0.2" (5mm) of accumulated precipitation.

How many days does it snow in December in Basin?

In Basin, Wyoming, during December, snow falls for 7.5 days and regularly aggregates up to 1.3" (33mm) of snow.

What is the month with the shortest days in Basin?

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

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

The average length of the day in December is 8.9h.

How many hours of sunshine does Basin have in December?

The average sunshine in December is 7h.

When is the lowest UV index in Basin?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Basin, Wyoming.

What is the UV index reading in December in Basin?

In Basin, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from the exposure to the Sun's UV radiation.

Average temperature in December
Basin, WY

Average temperature in December - Basin, WY
  • Average high temperature in December: 28.8°F

The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is December (28.8°F).

  • Average low temperature in December: 14.2°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.8°F).

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Average pressure in December
Basin, WY

Average pressure in December - Basin, WY
  • Average pressure in December: 30.15"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.87").

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Average wind speed in December
Basin, WY

Average wind speed in December - Basin, WY
  • Average wind speed in December: 6.5mph

The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest months (with the lowest average wind speed) are January and August (6mph).

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Average humidity in December
Basin, WY

Average humidity in December - Basin, WY
  • Average humidity in December: 73%

The month with the highest relative humidity is January (78%).
Months with the lowest relative humidity are July and August (33%).

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Average rainfall in December
Basin, WY

Average rainfall in December - Basin, WY
  • Average rainfall in December: 0.2"

The wettest month (with the highest rainfall) is May (0.87").
The driest month (with the least rainfall) is December (0.2").

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Average rainfall days in December
Basin, WY

Average rainfall days in December - Basin, WY
  • Average rainfall days in December: 6.5 days

The month with the highest number of rainy days is May (12.6 days).
The month with the least rainy days is December (6.5 days).

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Average snowfall in December
Basin, WY

Average snowfall in December - Basin, WY
  • Average snowfall in December: 1.3"

The month with the highest snowfall is February (2.52").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Basin, WY

Average snowfall days in December - Basin, WY
  • Average snowfall days in December: 7.5 days

The month with the highest number of snowfall days is February (9.8 days).
Months with the least snowfall days are June, July and August (0 days).

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Average daylight in December /
Average sunshine in December
Basin, WY

Average daylight in December / Average sunshine in December - Basin, WY
  • 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: 7h

Months with the most sunshine are June, July and August (Average sunshine: 11.9h).
The month with the least sunshine is January (Average sunshine: 6.7h).

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Average sunshine days in December
Basin, WY

Average sunshine days in December - Basin, WY
  • Average sunshine days in December: 20.9 days

The month with the most sunshine days is December (20.9 days).
Months with the least sunshine days are April and June (12.5 days).

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Average UV index in December
Basin, WY

Average UV index in December - Basin, WY
  • Average UV index in December: 2

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

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Average cloud cover in December
Basin, WY

Average cloud cover in December - Basin, WY
  • Average cloud cover in December: 26

The month with the most cloud cover is February (Cloud cover 28).
Months with the least cloud cover are July and August (Cloud cover 12).

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Average visibility in December
Basin, WY

Average visibility in December - Basin, WY
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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