December weather forecastFort Lyon, CO
December
Weather in December
December, the first month of the winter in Fort Lyon, is still a chilly month, with an average temperature varying between 43.7°F (6.5°C) and 26.6°F (-3°C).Temperature
Fort Lyon notes the coldest temperatures in December, with a high average of 43.7°F (6.5°C) and a low of 26.6°F (-3°C).Humidity
In December, the average relative humidity is 57%.Rainfall
January, November and December are months with the least rain when the rain falls for 3.6 days and typically aggregates up to 0.35" (9mm) of rain.Snowfall
January through May, October through December are months with snowfall. In Fort Lyon, during December, snow falls for 4.8 days and regularly aggregates up to 1.46" (37mm) of snow. In Fort Lyon, during the entire year, snow falls for 23.2 days and aggregates up to 10.28" (261mm) of snow.Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:50 am and sunset at 4:33 pm. On the last day of December, sunrise is at 7:08 am and sunset at 4:43 pm MST.
Sunshine
In December, the average sunshine is 6.8h.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 2 suggests these recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. When the Sun is at its strongest around midday, find shade and limit exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Fort Lyon, CO
- Average high temperature in December: 43.7°F
The warmest month (with the highest average high temperature) is July (92.8°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in December: 26.6°F
The month with the highest average low temperature is July (70.9°F).
The coldest month (with the lowest average low temperature) is December (26.6°F).
Average pressure in December
Fort Lyon, CO
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.82"Hg).
Average wind speed in December
Fort Lyon, CO
- Average wind speed in December: 8.3mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is January (8.2mph).
Average humidity in December
Fort Lyon, CO
- Average humidity in December: 57%
The month with the highest relative humidity is January (58%).
The month with the lowest relative humidity is June (38%).
Average rainfall in December
Fort Lyon, CO
- Average rainfall in December: 0.35"
The wettest month (with the highest rainfall) is July (1.81").
The driest months (with the least rainfall) are January, November and December (0.35").
Average rainfall days in December
Fort Lyon, CO
- Average rainfall days in December: 3.6 days
The month with the highest number of rainy days is July (13.8 days).
The month with the least rainy days is January (3.3 days).
Average snowfall in December
Fort Lyon, CO
- Average snowfall in December: 1.46"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Fort Lyon, CO
- Average snowfall days in December: 4.8 days
The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Fort Lyon, CO
- Average daylight in December: 9h and 36min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 6h and 48min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).
Average sunshine days in December
Fort Lyon, CO
- Average sunshine days in December: 24.4 days
The month with the most sunshine days is November (24.5 days).
The month with the least sunshine days is July (13.2 days).
Average UV index in December
Fort Lyon, CO
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 2).
Average cloud cover in December
Fort Lyon, CO
- Average cloud cover in December: 23
The months with the most cloud cover are February and April (Cloud cover 25).
The months with the least cloud cover are June and September (Cloud cover 14).
Average visibility in December
Fort Lyon, 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).
