December weather forecast and climate
Frederick, CO

Weather in December

The first month of the winter, December, is also a wintry month in Frederick, Colorado, with average temperature fluctuating between 40.8°F (4.9°C) and 21°F (-6.1°C).

Temperature

The coldest month is December, with an average high-temperature of 40.8°F (4.9°C) and an average low-temperature of 21°F (-6.1°C).

Humidity

The average relative humidity in December is 61%.

Rainfall

January and December are months with the least rain in Frederick when the rain falls for 3 days and typically aggregates up to 0.35" (9mm) of rain.

Snowfall

January through May, October through December are months with snowfall in Frederick. In Frederick, in December, during 5.9 snowfall days, 2.83" (72mm) of snow is typically accumulated. In Frederick, during the entire year, snow falls for 38.2 days, and aggregates up to 27.44" (697mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9.4h of daylight.

Sunshine

The average sunshine in Frederick is 6.8h.

UV index

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 2 transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Frederick?

The coldest month in Frederick is December, with an average high-temperature of 40.8°F (4.9°C) and an average low-temperature of 21°F (-6.1°C).

What is the temperature in December in Frederick?

The average high-temperature, in December, in Frederick, is 40.8°F (4.9°C), while the average low-temperature is 21°F (-6.1°C).

What is the average humidity in December in Frederick?

In Frederick, Colorado, the average relative humidity in December is 61%.

How many days does it rain in December in Frederick?

In Frederick, during December, the rain falls for 3 days and regularly aggregates up to 0.35" (9mm) of precipitation.

What is the driest month in Frederick?

Months with the least rainfall in Frederick, Colorado, are January and December Rain falls for 3 days and accumulates 0.35" (9mm) of rain.

How many days does it snow in December in Frederick?

In Frederick, Colorado, in December, during 5.9 snowfall days, 2.83" (72mm) of snow is typically accumulated.

What is the month with the shortest days in Frederick?

The month with the shortest days in Frederick is December, with an average of 9.4h of daylight.

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

In Frederick, Colorado, the average length of the day in December is 9.4h.

How long on average sun shines in December in Frederick?

The average sunshine in December in Frederick, Colorado, is 6.8h.

What are the months with the lowest UV index in Frederick?

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the UV index reading in December in Frederick?

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

Average temperature in December
Frederick, CO

Average temperature in December - Frederick, CO
  • Average high temperature in December: 40.8°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is December (40.8°F).

  • Average low temperature in December: 21°F

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is December (21°F).

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Average pressure in December
Frederick, CO

Average pressure in December - Frederick, CO
  • Average pressure in December: 30.12"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is June (29.9").

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Average wind speed in December
Frederick, CO

Average wind speed in December - Frederick, CO
  • Average wind speed in December: 5.7mph

The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is December (5.7mph).

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Average humidity in December
Frederick, CO

Average humidity in December - Frederick, CO
  • Average humidity in December: 61%

The month with the highest relative humidity is February (64%).
The month with the lowest relative humidity is August (40%).

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Average rainfall in December
Frederick, CO

Average rainfall in December - Frederick, CO
  • Average rainfall in December: 0.35"

The wettest month (with the highest rainfall) is May (1.69").
The driest months (with the least rainfall) are January and December (0.35").

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Average rainfall days in December
Frederick, CO

Average rainfall days in December - Frederick, CO
  • Average rainfall days in December: 3 days

Months with the highest number of rainy days are May and July (12.3 days).
Months with the least rainy days are January and December (3 days).

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Average snowfall in December
Frederick, CO

Average snowfall in December - Frederick, CO
  • Average snowfall in December: 2.83"

The month with the highest snowfall is April (4.45").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Frederick, CO

Average snowfall days in December - Frederick, CO
  • Average snowfall days in December: 5.9 days

The month with the highest number of snowfall days is February (7.8 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
Frederick, CO

Average daylight in December / Average sunshine in December - Frederick, CO
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 6.8h

Months with the most sunshine are June and July (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 6.7h).

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Average sunshine days in December
Frederick, CO

Average sunshine days in December - Frederick, CO
  • Average sunshine days in December: 24.5 days

The month with the most sunshine days is December (24.5 days).
The month with the least sunshine days is July (12.8 days).

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Average UV index in December
Frederick, CO

Average UV index in December - Frederick, CO
  • 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, November and December (UV index 2).

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Average cloud cover in December
Frederick, CO

Average cloud cover in December - Frederick, CO
  • Average cloud cover in December: 24

The month with the most cloud cover is April (Cloud cover 27).
The month with the least cloud cover is September (Cloud cover 15).

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Average visibility in December
Frederick, CO

Average visibility in December - Frederick, 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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