December weather forecast
Story, WY

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Weather in December

The first month of the winter, December, is also a subzero cold month in Story, Wyoming, with an average temperature varying between 15.3°F (-9.3°C) and 29.3°F (-1.5°C).

Temperature

The beginning of December marks a decrease in the average high-temperature, transitioning from an icy 39.7°F (4.3°C) in November to a freezing cold 29.3°F (-1.5°C). Story's nighttime temperature in December falls to an average of 15.3°F (-9.3°C).

Humidity

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

Rainfall

December is the month with the least rainfall in Story, Wyoming. Rain falls for 7.8 days and accumulates 0.75" (19mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. In Story, in December, snow falls for 13.6 days, with typically accumulated 4.41" (112mm) of snow. In Story, during the entire year, snow falls for 78.9 days and aggregates up to 46.3" (1176mm) of snow.

Daylight

December has the shortest days of the year, with an average of 8h and 54min of daylight.
On the first day of the month, sunrise is at 7:24 am and sunset at 4:28 pm. On the last day of December, sunrise is at 7:44 am and sunset at 4:37 pm MST.

Sunshine

The average sunshine in December is 6.5h.

UV index

The months with the lowest UV index in Story are January through April, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum high daily UV index of 2 during December translates into the following directions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
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Frequently asked questions

How cold is December in Story?

An average high-temperature, in December, in Story, is 29.3°F (-1.5°C) and the average low-temperature is 15.3°F (-9.3°C).

What is the average humidity in December in Story?

In December, the average relative humidity is 73%.

What is the driest month in Story?

The month with the least rainfall is December, when the rain falls for 7.8 days and typically collects 0.75" (19mm) of precipitation.

How much does it rain in Story in December?

In Story, in December, during 7.8 rainfall days, 0.75" (19mm) of precipitation is typically accumulated.

How many days does it snow in December in Story?

In Story, Wyoming, in December, during 13.6 snowfall days, 4.41" (112mm) of snow is typically accumulated.

What is the month with the shortest days in Story?

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

How many hours of daylight does Story have in December?

In December, the average day length is 8h and 53min.

What time are sunrise and sunset in December in Story?

On the first day of December in Story, sunrise is at 7:24 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 4:37 pm MST.

How long on average sun shines in December in Story?

In December, the average sunshine duration in Story is 6.5h.

When is the lowest UV index in Story?

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Story, Wyoming.

What is the UV index reading in December in Story?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe 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
Story, WY

Average temperature in December - Story, WY
  • Average high temperature in December: 29.3°F

The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is February (29.1°F).

  • Average low temperature in December: 15.3°F

The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is February (14.4°F).

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Average pressure in December
Story, WY

Average pressure in December - Story, WY
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in December
Story, WY

Average wind speed in December - Story, WY
  • Average wind speed in December: 6.6mph

The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

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Average humidity in December
Story, WY

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

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is August (46%).

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Average rainfall in December
Story, WY

Average rainfall in December - Story, WY
  • Average rainfall in December: 0.75"

The wettest month (with the highest rainfall) is May (3.43").
The driest month (with the least rainfall) is December (0.75").

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Average rainfall days in December
Story, WY

Average rainfall days in December - Story, WY
  • Average rainfall days in December: 7.8 days

The month with the highest number of rainy days is May (22.3 days).
The month with the least rainy days is November (7.5 days).

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Average snowfall in December
Story, WY

Average snowfall in December - Story, WY
  • Average snowfall in December: 4.41"

The month with the highest snowfall is April (8.7").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Story, WY

Average snowfall days in December - Story, WY
  • Average snowfall days in December: 13.6 days

The month with the highest number of snowfall days is February (15.8 days).
The 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
Story, WY

Average daylight in December / Average sunshine in December - Story, WY
  • 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 3min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 6min).

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Average sunshine days in December
Story, WY

Average sunshine days in December - Story, WY
  • Average sunshine days in December: 14.2 days

The month with the most sunshine days is November (15.2 days).
The month with the least sunshine days is May (5.8 days).

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Average UV index in December
Story, WY

Average UV index in December - Story, WY
  • 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, April, October, November and December (UV index 2).

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Average cloud cover in December
Story, WY

Average cloud cover in December - Story, WY
  • Average cloud cover in December: 33

The months with the most cloud cover are February and April (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 15).

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Average visibility in December
Story, WY

Average visibility in December - Story, WY
  • 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).

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Story, Wyoming, USA

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