December weather forecast and climate
Fort Lyon, CO

Weather in December

The first month of the winter, December, is still a chilly month in Fort Lyon, Colorado, with average temperature fluctuating between 43.7°F (6.5°C) and 26.6°F (-3°C).

Temperature

With an average high-temperature of 43.7°F (6.5°C) and an average low-temperature of 26.6°F (-3°C), December is the coldest month.

Humidity

In December, the average relative humidity is 57%.

Rainfall

January, November and December are months with the least rain in Fort Lyon when the rain falls for 3.6 days and typically aggregates up to 0.35" (9mm) of rain.

Snowfall

January through May, October through December are months with snowfall. In Fort Lyon, Colorado, during 4.8 snowfall days, 1.46" (37mm) of snow is typically accumulated. In Fort Lyon, Colorado, during the entire year, snow falls for 23.2 days, and aggregates up to 10.28" (261mm) of snow.

Daylight

The month with the shortest days in Fort Lyon is December, with an average of 9.6h of daylight.

Sunshine

The average sunshine in Fort Lyon is 6.8h.

UV index

January, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 2 transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 Fort Lyon?

The coldest month is December, with an average high-temperature of 43.7°F (6.5°C) and an average low-temperature of 26.6°F (-3°C).

What is the temperature in December in Fort Lyon?

The average high-temperature, in December, in Fort Lyon, is 43.7°F (6.5°C), while the average low-temperature is 26.6°F (-3°C).

What is the average humidity in December in Fort Lyon?

In Fort Lyon, Colorado, the average relative humidity in December is 57%.

How much does it rain in Fort Lyon in December?

In December, in Fort Lyon, the rain falls for 3.6 days. Throughout December, 0.35" (9mm) of precipitation is accumulated.

What is the driest month in Fort Lyon?

January, November and December are months with the least rain in Fort Lyon, Colorado, when the rain falls for 3.6 days and typically aggregates up to 0.35" (9mm) of rain.

How many days does it snow in December in Fort Lyon?

In Fort Lyon, in December, during 4.8 snowfall days, 1.46" (37mm) of snow is typically accumulated.

What is the month with the shortest days in Fort Lyon?

The month with the shortest days in Fort Lyon, Colorado, is December, with an average of 9.6h of daylight.

What is the average length of the day in December in Fort Lyon?

In December, the average length of the day is 9.6h.

How many hours of sunshine does Fort Lyon have in December?

The average sunshine in December in Fort Lyon, Colorado, is 6.8h.

What is the month with the lowest UV index in Fort Lyon?

January, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Fort Lyon.

What is the UV index reading in December in Fort Lyon?

The average daily maximum UV index in December in Fort Lyon is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to the Sun's UV rays.

Average temperature in December
Fort Lyon, CO

Average temperature in December - Fort Lyon, CO
  • Average high temperature in December: 43.7°F

The warmest month (with the highest average high temperature) is July (92.8°F).
The month with the lowest average high temperature is December (43.7°F).

  • Average low temperature in December: 26.6°F

The month with the highest average low temperature is July (70.9°F).
The coldest month (with the lowest average low temperature) is December (26.6°F).

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Average pressure in December
Fort Lyon, CO

Average pressure in December - Fort Lyon, CO
  • Average pressure in December: 30.08"

The month with the highest atmospheric pressure is January (30.09").
The month with the lowest atmospheric pressure is June (29.82").

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Average wind speed in December
Fort Lyon, CO

Average wind speed in December - Fort Lyon, CO
  • Average wind speed in December: 8.3mph

The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is January (8.2mph).

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Average humidity in December
Fort Lyon, CO

Average humidity in December - Fort Lyon, CO
  • Average humidity in December: 57%

The month with the highest relative humidity is January (58%).
The month with the lowest relative humidity is June (38%).

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Average rainfall in December
Fort Lyon, CO

Average rainfall in December - Fort Lyon, CO
  • Average rainfall in December: 0.35"

The wettest month (with the highest rainfall) is July (1.81").
The driest months (with the least rainfall) are January, November and December (0.35").

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Average rainfall days in December
Fort Lyon, CO

Average rainfall days in December - Fort Lyon, CO
  • Average rainfall days in December: 3.6 days

The month with the highest number of rainy days is July (13.8 days).
The month with the least rainy days is January (3.3 days).

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Average snowfall in December
Fort Lyon, CO

Average snowfall in December - Fort Lyon, CO
  • Average snowfall in December: 1.46"

The month with the highest snowfall is February (2.17").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Fort Lyon, CO

Average snowfall days in December - Fort Lyon, CO
  • Average snowfall days in December: 4.8 days

The month with the highest number of snowfall days is February (5.2 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Fort Lyon, CO

Average daylight in December / Average sunshine in December - Fort Lyon, CO
  • Average daylight in December: 9.6h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in December: 6.8h

The month with the most sunshine is July (Average sunshine: 11.9h).
The month with the least sunshine is February (Average sunshine: 6.7h).

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Average sunshine days in December
Fort Lyon, CO

Average sunshine days in December - Fort Lyon, CO
  • Average sunshine days in December: 24.4 days

The month with the most sunshine days is November (24.5 days).
The month with the least sunshine days is July (13.2 days).

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Average UV index in December
Fort Lyon, CO

Average UV index in December - Fort Lyon, CO
  • Average UV index in December: 2

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January, November and December (UV index 2).

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Average cloud cover in December
Fort Lyon, CO

Average cloud cover in December - Fort Lyon, CO
  • Average cloud cover in December: 23

Months with the most cloud cover are February and April (Cloud cover 25).
Months with the least cloud cover are June and September (Cloud cover 14).

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Average visibility in December
Fort Lyon, CO

Average visibility in December - Fort Lyon, CO
  • 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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