December weather forecast
Granite, CO

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Weather in December

The first month of the winter, December, is still a freezing cold month in Granite, Colorado, with an average temperature ranging between min 2.7°F (-16.3°C) and max 23.5°F (-4.7°C).

Temperature

Granite reaches its lowest average temperatures in December, measuring 23.5°F (-4.7°C) at the peak and 2.7°F (-16.3°C) at the lowest.

Humidity

In Granite, the average relative humidity in December is 83%.

Rainfall

In Granite, in December, during 6.6 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. In Granite, during the entire year, the rain falls for 120.6 days and collects up to 19.29" (490mm) of precipitation.

Snowfall

Months with snowfall in Granite are January through December. In Granite, Colorado, during December, snow falls for 17.9 days and regularly aggregates up to 10.12" (257mm) of snow. In Granite, during the entire year, snow falls for 142.6 days and aggregates up to 90.39" (2296mm) of snow.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year.
On the first day of December in Granite, sunrise is at 7:05 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:52 pm MST.

Sunshine

In December, the average sunshine in Granite is 6h.

UV index

February and December, with an average maximum UV index of 1, are months with the lowest UV index in Granite. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index of 1 during December leads to these instructions:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
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Frequently asked questions

What is the coldest time of year in Granite?

With average high and low temperatures of 23.5°F (-4.7°C) and 2.7°F (-16.3°C) respectively, December is Granite's coldest month.

How cold is December in Granite?

December temperatures vary between a high-temperature of 23.5°F (-4.7°C) and a low-temperature of 2.7°F (-16.3°C).

What is the average humidity in December in Granite?

The average relative humidity in December in Granite, Colorado, is 83%.

How many days does it rain in December in Granite?

In December, in Granite, the rain falls for 6.6 days. Throughout December, 1.26" (32mm) of precipitation is accumulated.

How much does it snow in Granite in December?

In Granite, Colorado, in December, during 17.9 snowfall days, 10.12" (257mm) of snow is typically accumulated.

What is the month with the shortest days in Granite?

With an average of 9h and 30min of daylight, December has the shortest days of the year in Granite, Colorado.

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

In Granite, Colorado, the average day length in December is 9h and 29min.

When are sunrise and sunset in December in Granite?

On the first day of December in Granite, sunrise is at 7:05 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:52 pm MST.

How long on average sun shines in December in Granite?

In December, the average sunshine duration in Granite, Colorado, is 6h.

When is the lowest UV index in Granite?

February and December, with an average maximum UV index of 1, are months with the lowest UV index in Granite.

What is the UV index intensity in December in Granite?

In December, the average daily maximum UV index in Granite, Colorado, is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability 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
Granite, CO

Average temperature in December - Granite, CO
  • Average high temperature in December: 23.5°F

The warmest month (with the highest average high temperature) is July (66.7°F).
The month with the lowest average high temperature is December (23.5°F).

  • Average low temperature in December: 2.7°F

The month with the highest average low temperature is July (40.1°F).
The coldest months (with the lowest average low temperature) are January and December (2.7°F).

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Average pressure in December
Granite, CO

Average pressure in December - Granite, CO
  • Average pressure in December: 30.16"Hg

The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is April (29.94"Hg).

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Average wind speed in December
Granite, CO

Average wind speed in December - Granite, CO
  • Average wind speed in December: 6.4mph

The windiest month (with the highest average wind speed) is February (7mph).
The calmest months (with the lowest average wind speed) are July and August (4.6mph).

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Average humidity in December
Granite, CO

Average humidity in December - Granite, CO
  • Average humidity in December: 83%

The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is June (51%).

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Average rainfall in December
Granite, CO

Average rainfall in December - Granite, CO
  • Average rainfall in December: 1.26"

The wettest month (with the highest rainfall) is July (2.83").
The driest month (with the least rainfall) is November (0.91").

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Average rainfall days in December
Granite, CO

Average rainfall days in December - Granite, CO
  • Average rainfall days in December: 6.6 days

The month with the highest number of rainy days is July (20.3 days).
The month with the least rainy days is November (3.9 days).

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Average snowfall in December
Granite, CO

Average snowfall in December - Granite, CO
  • Average snowfall in December: 10.12"

The month with the highest snowfall is March (15.08").
The month with the least snowfall is August (0.31").

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Average snowfall days in December
Granite, CO

Average snowfall days in December - Granite, CO
  • Average snowfall days in December: 17.9 days

The month with the highest number of snowfall days is March (20 days).
The month with the least snowfall days is August (1.3 days).

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

Average daylight in December / Average sunshine in December - Granite, CO
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 6h and 0min

The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).

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Average sunshine days in December
Granite, CO

Average sunshine days in December - Granite, CO
  • Average sunshine days in December: 12.6 days

The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is April (6.1 days).

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Average UV index in December
Granite, CO

Average UV index in December - Granite, CO
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are February and December (UV index 1).

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Average cloud cover in December
Granite, CO

Average cloud cover in December - Granite, CO
  • Average cloud cover in December: 42

The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 17).

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Average visibility in December
Granite, CO

Average visibility in December - Granite, CO
  • Average visibility in December: 4mi

The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).

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Granite, Colorado, USA

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