December weather forecast
Lewis, CO

Weather in December

The first month of the winter, December, is still a cold month in Lewis, Colorado, with temperature in the range of an average high of 37.2°F (2.9°C) and an average low of 21.7°F (-5.7°C).

Temperature

In December, the average high-temperature decreases from a frosty 49.5°F (9.7°C) in November to a wintry 37.2°F (2.9°C). In Lewis, Colorado, the average low-temperature is 21.7°F (-5.7°C).

Humidity

In December, the average relative humidity in Lewis is 67%.

Rainfall

The months with the most rainfall are January and December, with an average 1.26" (32mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall. In Lewis, Colorado, during 8.5 snowfall days, 7.44" (189mm) of snow is typically accumulated. Throughout the year, in Lewis, there are 34.4 snowfall days, and 29.29" (744mm) of snow is accumulated.

Daylight

With an average of 9h and 38min of daylight, December has the shortest days of the year in Lewis.
On the first day of the month, sunrise is at 7:10 am and sunset at 4:56 pm. On the last day of December, in Lewis, sunrise is at 7:29 am and sunset at 5:06 pm MST.

Sunshine

The months with the least sunshine are January and December, with an average of 6.5h of sunshine.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. 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 average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
[Resources]

FAQ

What is the average humidity in December in Lewis?

In December, the average relative humidity in Lewis, Colorado, is 67%.

What is the wettest month in Lewis?

The months with the most rainfall in Lewis, Colorado, are January and December, with an average 1.26" (32mm) of precipitation.

How many days does it rain in December in Lewis?

In Lewis, Colorado, in December, during 7.5 rainfall days, 1.26" (32mm) of precipitation is typically accumulated.

How much does it snow in Lewis in December?

In December, it is snowing for 8.5 days. Throughout December, 7.44" (189mm) of snow is accumulated.

What is the month with the shortest days in Lewis?

With an average of 9h and 38min of daylight, December has the shortest days of the year in Lewis.

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

The average day length in December in Lewis, Colorado, is 9h and 38min.

When is the sunrise / sunset in December in Lewis?

In December, on the first day of the month, sunrise is at 7:10 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:06 pm MST.

What is the month with the least sunshine in Lewis?

January and December, with an average of 6.5h of sunshine, are months with the least sunshine in Lewis, Colorado.

How many hours of sunshine does Lewis have in December?

In Lewis, the average sunshine duration in December is 6.5h.

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

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

How high is the UV index in December in Lewis?

The average daily maximum UV index in December in Lewis, Colorado, is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from exposure to Sun's UV rays.

Average temperature in December
Lewis, CO

Average temperature in December - Lewis, CO
  • Average high temperature in December: 37.2°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in December: 21.7°F

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

[Resources]

Average pressure in December
Lewis, CO

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

The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

[Resources]

Average wind speed in December
Lewis, CO

Average wind speed in December - Lewis, CO
  • Average wind speed in December: 5.9mph

The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is January (5.7mph).

[Resources]

Average humidity in December
Lewis, CO

Average humidity in December - Lewis, CO
  • Average humidity in December: 67%

The month with the highest relative humidity is January (73%).
The month with the lowest relative humidity is June (26%).

[Resources]

Average rainfall in December
Lewis, CO

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

The wettest months (with the highest rainfall) are January and December (1.26").
The driest month (with the least rainfall) is June (0.2").

[Resources]

Average rainfall days in December
Lewis, CO

Average rainfall days in December - Lewis, CO
  • Average rainfall days in December: 7.5 days

The month with the highest number of rainy days is July (9.6 days).
The month with the least rainy days is June (2.8 days).

[Resources]

Average snowfall in December
Lewis, CO

Average snowfall in December - Lewis, CO
  • Average snowfall in December: 7.44"

The month with the highest snowfall is January (8.11").
The months with the least snowfall are May, June, July, August and September (0").

[Resources]

Average snowfall days in December
Lewis, CO

Average snowfall days in December - Lewis, CO
  • Average snowfall days in December: 8.5 days

The months with the highest number of snowfall days are January and December (8.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

[Resources]

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

Average daylight in December / Average sunshine in December - Lewis, CO
  • Average daylight in December: 9h and 38min

The month with the longest days is June (Average daylight: 14h and 43min).
The month with the shortest days is December (Average daylight: 9h and 38min).

  • Average sunshine in December: 6.5h

The month with the most sunshine is June (Average sunshine: 12.1h).
The months with the least sunshine are January and December (Average sunshine: 6.5).

[Resources]

Average sunshine days in December
Lewis, CO

Average sunshine days in December - Lewis, CO
  • Average sunshine days in December: 19 days

The month with the most sunshine days is June (26.2 days).
The month with the least sunshine days is February (17.6 days).

[Resources]

Average UV index in December
Lewis, CO

Average UV index in December - Lewis, 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).

[Resources]

Average cloud cover in December
Lewis, CO

Average cloud cover in December - Lewis, CO
  • Average cloud cover in December: 27

The months with the most cloud cover are January and December (Cloud cover 27).
The month with the least cloud cover is June (Cloud cover 9).

[Resources]

Average visibility in December
Lewis, CO

Average visibility in December - Lewis, 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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location