December weather forecast
Platteville, CO

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Weather in December

The first month of the winter, December, is also an icy month in Platteville, Colorado, with temperature in the range of an average high of 39.9°F and an average low of 20.7°F.

Temperature

Temperature records mark December as the coldest month, with highs averaging 39.9°F and lows at 20.7°F.

Humidity

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

Rainfall

The months with the least rainfall are January and December Rain falls for 3.1 days and accumulates 0.12" of rain.

Snowfall

January through May, October through December are months with snowfall. In Platteville, during December, snow falls for 4.5 days and regularly aggregates up to 0.83" of snow. Throughout the year, in Platteville, there are 29.6 snowfall days, and 10.2" of snow is accumulated.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:02 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:43 pm MST.

Sunshine

In December, the average sunshine in Platteville 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 minimal health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 2 translates into these guidelines:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
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FAQ

What is the coldest month in Platteville?

The coldest period in Platteville, Colorado, tends to be December, when average temperatures fluctuate between a high of 39.9°F and a low of 20.7°F.

Is December cold in Platteville?

The average high-temperature, in December, in Platteville, is 39.9°F, while the average low-temperature is 20.7°F. The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, in August is estimated at 87.8°F.

What is the average humidity in December in Platteville?

In December, the average relative humidity is 63%.

What is the driest month in Platteville?

January and December are months with the least rain when the rain falls for 3.1 days and typically aggregates up to 0.12" of rain.

How much does it rain in Platteville in December?

In Platteville, Colorado, in December, during 3.1 rainfall days, 0.12" of precipitation is typically accumulated.

How much does it snow in Platteville in December?

In Platteville, in December, during 4.5 snowfall days, 0.83" of snow is typically accumulated.

What is the month with the shortest days in Platteville?

With an average of 9h and 24min of daylight, December has the shortest days of the year in Platteville, Colorado.

How many hours of daylight does Platteville have in December?

In Platteville, Colorado, the average day length in December is 9h and 22min.

When are sunrise and sunset in December in Platteville?

On the first day of December, sunrise is at 7:02 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:43 pm MST.

How long on average sun shines in December in Platteville?

In December, the average sunshine duration in Platteville is 6.9h.

What is the month with the lowest UV index in Platteville?

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

What is the UV index intensity in December in Platteville?

In December, the average daily maximum UV index in Platteville, Colorado, is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Platteville, CO

Average temperature in December - Platteville, CO
  • Average high temperature in December: 39.9°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 (39.9°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).

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Average pressure in December
Platteville, CO

Average pressure in December - Platteville, 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).

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Average wind speed in December
Platteville, CO

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

The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is December (5.5mph).

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Average humidity in December
Platteville, CO

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

The months with the highest relative humidity are January and February (64%).
The months with the lowest relative humidity are August and September (42%).

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Average rainfall in December
Platteville, CO

Average rainfall in December - Platteville, CO
  • Average rainfall in December: 0.12"

The wettest month (with the highest rainfall) is May (0.67").
The driest months (with the least rainfall) are January and December (0.12").

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Average rainfall days in December
Platteville, CO

Average rainfall days in December - Platteville, CO
  • Average rainfall days in December: 3.1 days

The month with the highest number of rainy days is May (10 days).
The months with the least rainy days are January and November (3 days).

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Average snowfall in December
Platteville, CO

Average snowfall in December - Platteville, CO
  • Average snowfall in December: 0.83"

The month with the highest snowfall is February (1.73").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Platteville, CO

Average snowfall days in December - Platteville, CO
  • Average snowfall days in December: 4.5 days

The month with the highest number of snowfall days is February (6.5 days).
The 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
Platteville, CO

Average daylight in December / Average sunshine in December - Platteville, 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: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).

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Average sunshine days in December
Platteville, CO

Average sunshine days in December - Platteville, CO
  • Average sunshine days in December: 26.3 days

The month with the most sunshine days is December (26.3 days).
The month with the least sunshine days is July (17.3 days).

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Average UV index in December
Platteville, CO

Average UV index in December - Platteville, 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).

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Average cloud cover in December
Platteville, CO

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

The months with the most cloud cover are February and April (Cloud cover 27).
The months with the least cloud cover are June and September (Cloud cover 15).

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Average visibility in December
Platteville, CO

Average visibility in December - Platteville, 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).

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Platteville, Colorado, USA

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