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 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
Riviera reaches its lowest average temperatures in December, measuring 56.3°F (13.5°C) at the peak and 43.5°F (6.4°C) at the lowest.Humidity
The average relative humidity in December is 41%.Rainfall
December is the month with the most rainfall. Rain falls for 5.5 days and accumulates 0.67" (17mm) of precipitation.Snowfall
The only month with snowfall in Riviera is December. The month with the most snowfall days is December, when snow falls for 0.1 days.Daylight
December has the shortest days of the year in Riviera, with an average of 9h and 48min of daylight.On the first day of the month, sunrise is at 7:28 am and sunset at 5:26 pm. On the last day of December, sunrise is at 7:46 am and sunset at 5:37 pm MST.
Sunshine
With an average of 7h of sunshine, December has the least sunshine of the year in Riviera.UV index
December is the month with the lowest UV index in Riviera, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: During December, 3 as the daily maximum UV index converts into the following advice:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
What are the coldest months in Riviera?
What are December temperatures in Riviera?
What is the average humidity in December in Riviera?
What is the wettest month in Riviera?
How many days does it rain in December in Riviera?
What is the snowiest month in Riviera?
When does it start snowing in Riviera?
What is the month with the shortest days in Riviera?
What is the average length of the day in December in Riviera?
When are sunrise and sunset in December in Riviera?
What is the month with the least sunshine in Riviera?
How long on average sun shines in December in Riviera?
When is the lowest UV index in Riviera?
What is the UV index intensity in December in Riviera?
Average temperature in December
Riviera, AZ
- Average high temperature in December: 56.3°F
The warmest month (with the highest average high temperature) is July (100.8°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in December: 43.5°F
The month with the highest average low temperature is August (81.5°F).
The coldest month (with the lowest average low temperature) is December (43.5°F).
Average pressure in December
Riviera, AZ
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.76"Hg).
Average wind speed in December
Riviera, AZ
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is September (7.6mph).
Average humidity in December
Riviera, AZ
- Average humidity in December: 41%
The month with the highest relative humidity is January (42%).
The month with the lowest relative humidity is June (14%).
Average rainfall in December
Riviera, AZ
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is December (0.67").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Riviera, AZ
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is July (5.9 days).
The month with the least rainy days is June (1.1 days).
Average snowfall days in December
Riviera, AZ
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Riviera, AZ
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 7h and 0min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in December
Riviera, AZ
- Average sunshine days in December: 24.5 days
The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is July (20.3 days).
Average UV index in December
Riviera, AZ
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
Riviera, AZ
- Average cloud cover in December: 19
The month with the most cloud cover is December (Cloud cover 19).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility in December
Riviera, 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).
Riviera, Arizona, USA
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