December weather forecast and climate
Brighton, CO

Trees on partly frozen lake water in Barr Lake State Park in Brighton, Colorado
Trees on partly frozen lake water in Barr Lake State Park in Brighton, Colorado

Weather in December

The first month of the winter, December, is also a wintry month in Brighton, Colorado, with average temperature fluctuating between 21.2°F (-6°C) and 40.8°F (4.9°C).

Temperature

With an average high-temperature of 40.8°F (4.9°C) and an average low-temperature of 21.2°F (-6°C), December is the coldest month.

Humidity

In Brighton, the average relative humidity is 62%.

Rainfall

December is the month with the least rainfall in Brighton. Rain falls for 2.6 days and accumulates 0.12" (3mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Brighton, Colorado, snow falls for 4.5 days, with typically accumulated 0.75" (19mm) of snow. In Brighton, Colorado, during the entire year, snow falls for 30.9 days, and aggregates up to 11.42" (290mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9.4h of daylight.

Sunshine

The average sunshine in Brighton, Colorado, 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 value of 2, and less, symbolizes a low threat to health from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 2 interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
[Resources]

FAQ

What is the coldest month in Brighton?

December is the coldest month in Brighton, with an average high-temperature of 40.8°F (4.9°C) and an average low-temperature of 21.2°F (-6°C).

What is the temperature in December in Brighton?

In December, in Brighton, Colorado, the average high-temperature is 40.8°F (4.9°C), and the average low-temperature is 21.2°F (-6°C).

What is the average humidity in December in Brighton?

In December, the average relative humidity is 62%.

How many days does it rain in December in Brighton?

In Brighton, in December, it is raining for 2.6 days, with typically 0.12" (3mm) of accumulated precipitation.

What is the driest month in Brighton?

The month with the least rainfall in Brighton, Colorado, is December when the rain falls for 2.6 days and typically collects 0.12" (3mm) of precipitation.

How many days does it snow in December in Brighton?

In Brighton, Colorado, in December, snow falls for 4.5 days, with typically accumulated 0.75" (19mm) of snow.

What is the month with the shortest days in Brighton?

With an average of 9.4h of daylight, December has the shortest days of the year in Brighton.

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

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

How long on average sun shines in December in Brighton?

In Brighton, Colorado, the average sunshine in December is 6.8h.

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

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

How high is the UV index in December in Brighton?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from the exposure to the Sun's UV radiation.

Average temperature in December
Brighton, CO

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

The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is December (40.8°F).

  • Average low temperature in December: 21.2°F

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is December (21.2°F).

[Resources]

Average pressure in December
Brighton, CO

Average pressure in December - Brighton, CO
  • Average pressure in December: 30.11"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is June (29.9").

[Resources]

Average wind speed in December
Brighton, CO

Average wind speed in December - Brighton, CO
  • Average wind speed in December: 6mph

The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is December (6mph).

[Resources]

Average humidity in December
Brighton, CO

Average humidity in December - Brighton, CO
  • Average humidity in December: 62%

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

[Resources]

Average rainfall in December
Brighton, CO

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

The wettest month (with the highest rainfall) is May (0.98").
The driest month (with the least rainfall) is December (0.12").

[Resources]

Average rainfall days in December
Brighton, CO

Average rainfall days in December - Brighton, CO
  • Average rainfall days in December: 2.6 days

The month with the highest number of rainy days is May (10.8 days).
The month with the least rainy days is December (2.6 days).

[Resources]

Average snowfall in December
Brighton, CO

Average snowfall in December - Brighton, CO
  • Average snowfall in December: 0.75"

The month with the highest snowfall is February (1.89").
Months with the least snowfall are June, July, August and September (0").

[Resources]

Average snowfall days in December
Brighton, CO

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

The month with the highest number of snowfall days is February (6.8 days).
Months with the least snowfall days are June, July and August (0 days).

[Resources]

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

Average daylight in December / Average sunshine in December - Brighton, 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: 6.6h).

[Resources]

Average sunshine days in December
Brighton, CO

Average sunshine days in December - Brighton, CO
  • Average sunshine days in December: 25.8 days

The month with the most sunshine days is December (25.8 days).
The month with the least sunshine days is July (14.8 days).

[Resources]

Average UV index in December
Brighton, CO

Average UV index in December - Brighton, 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).

[Resources]

Average cloud cover in December
Brighton, CO

Average cloud cover in December - Brighton, CO
  • Average cloud cover in December: 25

The month with the most cloud cover is April (Cloud cover 28).
Months with the least cloud cover are June, August and September (Cloud cover 16).

[Resources]

Average visibility in December
Brighton, CO

Average visibility in December - Brighton, 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).

[Resources]