December weather forecast
Milliken, CO

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Weather in December

The first month of the winter, December, is still a cold month in Milliken, Colorado, with an average temperature ranging between max 39.4°F (4.1°C) and min 20.7°F (-6.3°C).

Temperature

With average high and low temperatures of 39.4°F (4.1°C) and 20.7°F (-6.3°C) respectively, December is Milliken's coldest month.

Humidity

The months with the highest humidity in Milliken are January, February and December, with an average relative humidity of 63%.

Rainfall

The months with the least rainfall are January and December Rain falls for 5.2 days and accumulates 0.39" (10mm) of rain.

Snowfall

January through May, October through December are months with snowfall. In Milliken, Colorado, during December, snow falls for 7 days and regularly aggregates up to 2.76" (70mm) of snow. Throughout the year, there are 41 snowfall days, and 25.51" (648mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:03 am and sunset at 4:33 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:43 pm MST.

Sunshine

In December, the average sunshine is 6.9h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In December, the UV index of 2 transforms into the following advice:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Updated: Jun 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months?

December, noted for its average high-temperature of 39.4°F (4.1°C) and an average low-temperature of 20.7°F (-6.3°C), is considered the coldest month.

Is December cold?

In Milliken, 39.4°F (4.1°C) is the average high-temperature and 20.7°F (-6.3°C) is the average low-temperature during December. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, in August is estimated at 87.8°F (31°C).

What is the most humid month?

January, February and December, with an average relative humidity of 63%, are most humid months.

What is the average humidity in December?

In Milliken, the average relative humidity in December is 63%.

What is the driest month?

January and December are months with the least rain when the rain falls for 5.2 days and typically aggregates up to 0.39" (10mm) of rain.

How many days does it rain in December?

In Milliken, in December, during 5.2 rainfall days, 0.39" (10mm) of precipitation is typically accumulated.

How much does it snow in Milliken in December?

In Milliken, during December, snow falls for 7 days and regularly aggregates up to 2.76" (70mm) of snow.

What is the month with the shortest days in Milliken?

The month with the shortest days is December, with an average of 9h and 24min of daylight.

How many hours of daylight does Milliken have in December?

In December, the average day length is 9h and 21min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:03 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:43 pm MST.

How many hours of sunshine does Milliken have in December?

The average sunshine duration in December is 6.9h.

What is the month with the lowest UV index?

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

What is the UV index intensity in December?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health threat 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
Milliken, CO

Average temperature in December - Milliken, CO
  • Average high temperature in December: 39.4°F

The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is December (39.4°F).

  • Average low temperature in December: 20.7°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is December (20.7°F).

Average pressure in December
Milliken, CO

Average pressure in December - Milliken, CO
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed in December
Milliken, CO

Average wind speed in December - Milliken, CO
  • Average wind speed in December: 5.5mph

The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is December (5.5mph).

Average humidity in December
Milliken, CO

Average humidity in December - Milliken, CO
  • Average humidity in December: 63%

The months with the highest relative humidity are January, February and December (63%).
The months with the lowest relative humidity are August and September (42%).

Average rainfall in December
Milliken, CO

Average rainfall in December - Milliken, CO
  • Average rainfall in December: 0.39"

The wettest month (with the highest rainfall) is May (2.13").
The driest months (with the least rainfall) are January and December (0.39").

Average rainfall days in December
Milliken, CO

Average rainfall days in December - Milliken, CO
  • Average rainfall days in December: 5.2 days

The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is November (3.7 days).

Average snowfall in December
Milliken, CO

Average snowfall in December - Milliken, CO
  • Average snowfall in December: 2.76"

The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Milliken, CO

Average snowfall days in December - Milliken, CO
  • Average snowfall days in December: 7 days

The month with the highest number of snowfall days is February (9.6 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in December /
Average sunshine in December
Milliken, CO

Average daylight in December / Average sunshine in December - Milliken, CO
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 6h and 5min

The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).

Average sunshine days in December
Milliken, CO

Average sunshine days in December - Milliken, CO
  • Average sunshine days in December: 22.2 days

The month with the most sunshine days is January (22.4 days).
The month with the least sunshine days is July (11.4 days).

Average UV index in December
Milliken, CO

Average UV index in December - Milliken, CO
  • Average UV index in December: 2

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

Average cloud cover in December
Milliken, CO

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

The month with the most cloud cover is April (Cloud cover 27).
The months with the least cloud cover are June and September (Cloud cover 16).

Average visibility in December
Milliken, CO

Average visibility in December - Milliken, CO
  • 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).

Milliken, Colorado, USA

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