Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The shift from November to December involves a decrease in the average high-temperature, from a frosty 49.5°F (9.7°C) to an icy 37.2°F (2.9°C). An average low-temperature of 21.7°F (-5.7°C) is noted during the month of December.Humidity
The average relative humidity in December in Lewis is 67%.Rainfall
The months with the most rainfall in Lewis, Colorado, are January and December, with an average 1.26" (32mm) of precipitation.Snowfall
Months with snowfall in Lewis are January through April, October through December. In Lewis, in December, 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
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of December in Lewis, sunrise is at 7:11 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.
Sunshine
The months with the least sunshine are January and December, with an average of 6.5h of sunshine.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 vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In December, the UV index of 2 transforms into the following advice:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Lewis in December?
What is the average humidity in December in Lewis?
What is the rainiest month in Lewis?
How many days does it rain in December in Lewis?
How much does it snow in Lewis in December?
What is the month with the shortest days in Lewis?
What is the average length of the day in December in Lewis?
When is the sunrise / sunset in December in Lewis?
What are the months with the least sunshine in Lewis?
How long on average sun shines in December in Lewis?
What are the months with the lowest UV index in Lewis?
What is the UV index reading in December in Lewis?
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).
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).
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).
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%).
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").
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).
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").
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).
Average daylight in December /
Average sunshine in December
Lewis, 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 3min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 6h and 30min).
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).
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).
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).
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).
Lewis, Colorado, USA
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