December weather forecastSierra Vista, AZ
December
Weather in December
December in Sierra Vista is characterized by the chills of winter. The city faces its coldest month, with temperatures dropping down to a daily average low of 37.8°F (3.2°C). Snow showers happen occasionally, usually amounting to an average snowfall of 1.22" (31mm), adding a picturesque winter aura to the city. Despite the dip in temperature and shorter daylight hours, sightseeing and outdoor activities remain enjoyable because of the city’s bright, sunny days.Temperature
Sierra Vista, Arizona, reaches its lowest average temperatures in December, measuring 56.5°F (13.6°C) at the peak and 37.8°F (3.2°C) at the lowest.Humidity
The average relative humidity in December is 49%.Rainfall
In December, the rain falls for 5.7 days. Throughout December, 0.59" (15mm) of precipitation is accumulated. In Sierra Vista, during the entire year, the rain falls for 92.2 days and collects up to 15.47" (393mm) of precipitation.Snowfall
Months with snowfall are January through March and December. December is the first month it typically snows. Throughout December, in the average 1.3 snowfall days, it receives 1.22" (31mm) of snow. In Sierra Vista, during the entire year, snow falls for 3 days and aggregates up to 3.27" (83mm) of snow.Daylight
With an average of 10h and 6min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:03 am and sunset at 5:17 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 5:28 pm MST.
Sunshine
December has the least sunshine of the year, with an average of 6.9h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index, 3 in December, converts into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sierra Vista, AZ
- Average high temperature in December: 56.5°F
The warmest month (with the highest average high temperature) is June (90.1°F).
The month with the lowest average high temperature is December (56.5°F).
- Average low temperature in December: 37.8°F
The month with the highest average low temperature is July (69.6°F).
The coldest months (with the lowest average low temperature) are January and December (37.8°F).
Average pressure in December
Sierra Vista, AZ
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Sierra Vista, AZ
- Average wind speed in December: 6.6mph
The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in December
Sierra Vista, AZ
- Average humidity in December: 49%
The month with the highest relative humidity is September (50%).
The months with the lowest relative humidity are May and June (23%).
Average rainfall in December
Sierra Vista, AZ
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is July (4.53").
The driest month (with the least rainfall) is May (0.12").
Average rainfall days in December
Sierra Vista, AZ
- Average rainfall days in December: 5.7 days
The month with the highest number of rainy days is July (21.3 days).
The month with the least rainy days is May (2.3 days).
Average snowfall in December
Sierra Vista, AZ
- Average snowfall in December: 1.22"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Sierra Vista, AZ
- Average snowfall days in December: 1.3 days
The month with the highest number of snowfall days is December (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Sierra Vista, AZ
- Average daylight in December: 10h and 6min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in December: 6h and 54min
The months with the most sunshine are June and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in December
Sierra Vista, AZ
- Average sunshine days in December: 23.5 days
The month with the most sunshine days is May (28.1 days).
The month with the least sunshine days is July (6.5 days).
Average UV index in December
Sierra Vista, AZ
- Average UV index in December: 3
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Sierra Vista, AZ
- Average cloud cover in December: 21
The month with the most cloud cover is July (Cloud cover 24).
The month with the least cloud cover is May (Cloud cover 8).
Average visibility in December
Sierra Vista, AZ
- 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).
