December weather forecast
Platoro, CO

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Weather in December

The first month of the winter, December, is still a freezing cold month in Platoro, Colorado, with an average temperature fluctuating between 9.5°F (-12.5°C) and 28.6°F (-1.9°C).

Temperature

Platoro's December weather comes with a decrease in average high-temperatures, moving from an icy 40.1°F (4.5°C) in November to a freezing cold 28.6°F (-1.9°C). Platoro's nighttime temperature in December falls to an average of 9.5°F (-12.5°C).

Humidity

In Platoro, the average relative humidity in December is 78%.

Rainfall

In Platoro, during December, the rain falls for 5.3 days and regularly aggregates up to 0.79" (20mm) of precipitation. Throughout the year, there are 116.8 rainfall days, and 17.01" (432mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through June, September through December. In December, it is snowing for 11.8 days. Throughout December, 6.22" (158mm) of snow is accumulated. Throughout the year, there are 78.8 snowfall days, and 51.85" (1317mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 36min of daylight.
On the first day of the month, sunrise is at 7:02 am and sunset at 4:48 pm. On the last day of December, sunrise is at 7:20 am and sunset at 4:58 pm MST.

Sunshine

In Platoro, the average sunshine in December is 6.4h.

UV index

The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 2 in December transforms into the following instructions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Enhance your sun protection with tightly woven, yet airy clothing. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Updated: Jun 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

December temperatures vary between a high-temperature of 28.6°F (-1.9°C) and a low-temperature of 9.5°F (-12.5°C).

What is the average humidity in December?

In Platoro, the average relative humidity in December is 78%.

How much does it rain in December?

In Platoro, in December, during 5.3 rainfall days, 0.79" (20mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Platoro, in December, during 11.8 snowfall days, 6.22" (158mm) of snow is typically accumulated.

What is the month with the shortest days?

With an average of 9h and 36min of daylight, December has the shortest days of the year in Platoro.

What is the average length of the day in December?

In December, the average day length is 9h and 38min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:02 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:58 pm MST.

How long on average sun shines in December?

The average sunshine duration in December is 6.4h.

What is the month with the lowest UV index?

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

What is the UV index intensity in December?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health threat from unprotected exposure to UV radiation.
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
Platoro, CO

Average temperature in December - Platoro, CO
  • Average high temperature in December: 28.6°F

The warmest month (with the highest average high temperature) is July (71.2°F).
The month with the lowest average high temperature is January (27.9°F).

  • Average low temperature in December: 9.5°F

The month with the highest average low temperature is July (45.5°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).

Average pressure in December
Platoro, CO

Average pressure in December - Platoro, CO
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is April (29.93"Hg).

Average wind speed in December
Platoro, CO

Average wind speed in December - Platoro, CO
  • Average wind speed in December: 5.8mph

The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest months (with the lowest average wind speed) are July and August (4.3mph).

Average humidity in December
Platoro, CO

Average humidity in December - Platoro, CO
  • Average humidity in December: 78%

The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is June (42%).

Average rainfall in December
Platoro, CO

Average rainfall in December - Platoro, CO
  • Average rainfall in December: 0.79"

The wettest month (with the highest rainfall) is July (3.86").
The driest month (with the least rainfall) is November (0.63").

Average rainfall days in December
Platoro, CO

Average rainfall days in December - Platoro, CO
  • Average rainfall days in December: 5.3 days

The month with the highest number of rainy days is July (23.2 days).
The month with the least rainy days is November (3 days).

Average snowfall in December
Platoro, CO

Average snowfall in December - Platoro, CO
  • Average snowfall in December: 6.22"

The month with the highest snowfall is March (8.78").
The months with the least snowfall are July and August (0").

Average snowfall days in December
Platoro, CO

Average snowfall days in December - Platoro, CO
  • Average snowfall days in December: 11.8 days

The month with the highest number of snowfall days is February (12.9 days).
The months with the least snowfall days are July and August (0 days).

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

Average daylight in December / Average sunshine in December - Platoro, CO
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 6h and 2min

The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 18min).

Average sunshine days in December
Platoro, CO

Average sunshine days in December - Platoro, CO
  • Average sunshine days in December: 18.5 days

The month with the most sunshine days is November (23.2 days).
The month with the least sunshine days is July (5.6 days).

Average UV index in December
Platoro, CO

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

The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

Average cloud cover in December
Platoro, CO

Average cloud cover in December - Platoro, CO
  • Average cloud cover in December: 33

The month with the most cloud cover is February (Cloud cover 37).
The month with the least cloud cover is June (Cloud cover 15).

Average visibility in December
Platoro, CO

Average visibility in December - Platoro, CO
  • Average visibility in December: 5mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).

Platoro, Colorado, USA

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