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
December brings the lowest temperatures, with an average high of 41.2°F (5.1°C) and an average low of 20.7°F (-6.3°C).Humidity
In Highlands Ranch, the average relative humidity in December is 60%.Rainfall
In December, the rain falls for 2.8 days. Throughout December, 0.47" (12mm) of precipitation is accumulated. In Highlands Ranch, during the entire year, the rain falls for 77.1 days and collects up to 10.16" (258mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Highlands Ranch, in December, during 6.1 snowfall days, 3.7" (94mm) of snow is typically accumulated. In Highlands Ranch, during the entire year, snow falls for 39.3 days and aggregates up to 33.43" (849mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:01 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:46 pm MST.
Sunshine
In December, the average sunshine is 7h.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 estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 2 in December translates into these instructions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
Is December cold?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Highlands Ranch have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Highlands Ranch, CO
- Average high temperature in December: 41.2°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is December (41.2°F).
- Average low temperature in December: 20.7°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is December (20.7°F).
Average pressure in December
Highlands Ranch, CO
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).
Average wind speed in December
Highlands Ranch, CO
- Average wind speed in December: 6.5mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest months (with the lowest average wind speed) are August and September (6.4mph).
Average humidity in December
Highlands Ranch, CO
- Average humidity in December: 60%
The month with the highest relative humidity is February (65%).
The months with the lowest relative humidity are June and August (42%).
Average rainfall in December
Highlands Ranch, CO
- Average rainfall in December: 0.47"
The wettest month (with the highest rainfall) is May (1.61").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in December
Highlands Ranch, CO
- Average rainfall days in December: 2.8 days
The month with the highest number of rainy days is July (11.8 days).
The month with the least rainy days is January (1.5 days).
Average snowfall in December
Highlands Ranch, CO
- Average snowfall in December: 3.7"
The month with the highest snowfall is February (5.75").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Highlands Ranch, CO
- Average snowfall days in December: 6.1 days
The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Highlands Ranch, CO
- Average daylight in December: 9h and 2min
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 24min).
- Average sunshine in December: 7h and 0min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 48min).
Average sunshine days in December
Highlands Ranch, CO
- Average sunshine days in December: 23.4 days
The month with the most sunshine days is October (24.5 days).
The month with the least sunshine days is July (16.3 days).
Average UV index in December
Highlands Ranch, 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
Highlands Ranch, CO
- Average cloud cover in December: 21
The months with the most cloud cover are April and May (Cloud cover 25).
The month with the least cloud cover is September (Cloud cover 14).
Average visibility in December
Highlands Ranch, 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).
Highlands Ranch, Colorado, USA
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