December weather forecastCortez, CO
December
Weather in December
In December, the weather in Cortez enters the heart of winter, with temperatures plunging sharply in comparison to the previous month. The average high temperature in December goes down from November's 49.5°F (9.7°C) to a chilly 37.2°F (2.9°C). A transformative period, the cityscape quickly becomes a winter wonderland with substantial snowfall, making it a magical time to visit Cortez. Despite the cold, December, with its snow-covered beauty and holiday cheer, remains an enchanting period in the city.Temperature
Cortez in December undergoes a mild reduction in the average high-temperature, shifting from November's frosty 49.5°F (9.7°C) to an icy 37.2°F (2.9°C). Cortez sees an average low-temperature of 21.7°F (-5.7°C) during December.Humidity
In Cortez, the average relative humidity in December is 67%.Rainfall
The months with the most rainfall are January and December, with an average 1.26" (32mm) of precipitation.Snowfall
Months with snowfall in Cortez are January through April, October through December. In Cortez, Colorado, in December, snow falls for 8.5 days, with typically accumulated 7.44" (189mm) of snow. Throughout the year, there are 34.4 snowfall days, and 29.29" (744mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 7:10 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:06 pm MST.
Sunshine
January and December, with an average of 6.5h of sunshine, are months with the least sunshine in Cortez.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 reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high daily UV index of 2 during December translates into the following directions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Cortez, 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
Cortez, 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
Cortez, 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
Cortez, 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
Cortez, 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
Cortez, 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
Cortez, 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
Cortez, 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
Cortez, CO
- Average daylight in December: 9h and 36min
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 30min
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
Cortez, 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
Cortez, 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
Cortez, 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
Cortez, 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).
