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 onset of December is marked by a decrease in temperature, transitioning from a frosty 43.5°F (6.4°C) in November to an icy 32°F (0°C). An average low-temperature of 15.8°F (-9°C) is noted during the nights in December.Humidity
The average relative humidity in December is 77%.Rainfall
In December, the rain falls for 8.5 days. Throughout December, 1.65" (42mm) of precipitation is accumulated. Throughout the year, there are 122.7 rainfall days, and 17.91" (455mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Mesa, in December, during 13.6 snowfall days, 10.79" (274mm) of snow is typically accumulated. Throughout the year, there are 64.1 snowfall days, and 49.21" (1250mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of December in Mesa, sunrise is at 7:13 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 5:00 pm MST.
Sunshine
The average sunshine in December is 6.1h.UV index
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 2 during December leads to these instructions:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days 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 Mesa have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Mesa have in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Mesa, CO
- Average high temperature in December: 32°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in December: 15.8°F
The month with the highest average low temperature is July (54.3°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in December
Mesa, CO
- Average pressure in December: 30.2"Hg
The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is May (29.91"Hg).
Average wind speed in December
Mesa, CO
- Average wind speed in December: 4.3mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in December
Mesa, CO
- Average humidity in December: 77%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is June (37%).
Average rainfall in December
Mesa, CO
- Average rainfall in December: 1.65"
The wettest month (with the highest rainfall) is March (2.09").
The driest month (with the least rainfall) is August (0.83").
Average rainfall days in December
Mesa, CO
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is April (15.5 days).
The month with the least rainy days is November (6.2 days).
Average snowfall in December
Mesa, CO
- Average snowfall in December: 10.79"
The month with the highest snowfall is January (12.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mesa, CO
- Average snowfall days in December: 13.6 days
The month with the highest number of snowfall days is January (15.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mesa, CO
- Average daylight in December: 9h and 3min
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 30min).
- Average sunshine in December: 6h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 48min).
Average sunshine days in December
Mesa, CO
- Average sunshine days in December: 14.9 days
The month with the most sunshine days is August (20.8 days).
The month with the least sunshine days is February (10.7 days).
Average UV index in December
Mesa, CO
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Mesa, CO
- Average cloud cover in December: 37
The month with the most cloud cover is February (Cloud cover 40).
The months with the least cloud cover are June and September (Cloud cover 14).
Average visibility in December
Mesa, CO
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Mesa, Colorado, USA
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