December weather forecastRio Rico, AZ

December

Weather in December

The first month of the winter, December, is still a mild month in Rio Rico, Arizona, with an average temperature varying between 59.2°F (15.1°C) and 39.9°F (4.4°C).

Temperature

Rio Rico's coldest month, December, generally records average temperatures ranging from a high of 59.2°F (15.1°C) to a low of 39.9°F (4.4°C).

Humidity

In Rio Rico, the average relative humidity in December is 48%.

Rainfall

In Rio Rico, in December, during 5.7 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. Throughout the year, there are 87.8 rainfall days, and 15.43" (392mm) of precipitation is accumulated.

Snowfall

January through March and December are months with snowfall in Rio Rico. The month with the most snowfall is December, when snow falls for 0.7 days and typically aggregates up to 1.06" (27mm) 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 the month, sunrise is at 7:05 am and sunset at 5:20 pm. On the last day of December, sunrise is at 7:23 am and sunset at 5:31 pm MST.

Sunshine

December has the least sunshine of the year in Rio Rico, with an average of 6.9h of sunshine.

UV index

The months with the lowest UV index are January, November and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 3 during December translates into the following directions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.

Updated: Aug 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

December, on average, is the coldest month, registering a high temperature of 59.2°F (15.1°C) and a low of 39.9°F (4.4°C).

In Rio Rico, 59.2°F (15.1°C) is the average high-temperature and 39.9°F (4.4°C) is the average low-temperature during December. In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 84.2°F (29°C).

The average relative humidity in December is 48%.

In Rio Rico, in December, during 5.7 rainfall days, 0.71" (18mm) of precipitation is typically accumulated.

The month with the most snowfall is December, when snow falls for 0.7 days and typically aggregates up to 1.06" (27mm) of snow.

December is the first month it typically snows. Throughout December, in the average 0.7 snowfall days, it receives 1.06" (27mm) of snow.

With an average of 10h and 6min of daylight, December has the shortest days of the year.

In Rio Rico, the average day length in December is 10h and 8min.

On the first day of December, sunrise is at 7:05 am and sunset at 5:20 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:31 pm MST.

December has the least sunshine of the year, with an average of 6.9h of sunshine.

The average sunshine duration in December is 6.9h.

January, November and December, with an average maximum UV index of 3, are months with the lowest UV index.

In December, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

67.6°F

59.2°F

60.4°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

8.1mph

7.6mph

7.1mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

26.4

24.4

25.8

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Rio Rico, AZ

Average high temperature in December: 59.2°F

The warmest month (with the highest average high temperature) is June (91°F).
The month with the lowest average high temperature is December (59.2°F).

Average low temperature in December: 39.9°F

The month with the highest average low temperature is July (70.2°F).
The coldest month (with the lowest average low temperature) is December (39.9°F).

Average pressure in December
Rio Rico, AZ

Average pressure in December: 30.03"Hg

The month with the highest atmospheric pressure is January (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.82"Hg).

Average wind speed in December
Rio Rico, AZ

Average wind speed in December: 6.8mph

The windiest month (with the highest average wind speed) is May (9.9mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in December
Rio Rico, AZ

Average humidity in December: 48%

The month with the highest relative humidity is August (51%).
The months with the lowest relative humidity are May and June (24%).

Average rainfall in December
Rio Rico, AZ

Average rainfall in December: 0.71"

The wettest month (with the highest rainfall) is July (4.53").
The driest month (with the least rainfall) is May (0.16").

Average rainfall days in December
Rio Rico, AZ

Average rainfall days in December: 5.7 days

The month with the highest number of rainy days is July (21.9 days).
The month with the least rainy days is May (1.8 days).

Average snowfall in December
Rio Rico, AZ

Average snowfall in December: 1.06"

The month with the highest snowfall is December (1.06").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in December
Rio Rico, AZ

Average snowfall days in December: 0.7 days

The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average daylight in December /
Average sunshine in December
Rio Rico, 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 month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).

Average sunshine days in December
Rio Rico, AZ

Average sunshine days in December: 24.4 days

The month with the most sunshine days is May (28.8 days).
The month with the least sunshine days is July (6.6 days).

Average UV index in December
Rio Rico, AZ

Average UV index in December: 3

The months with the highest UV index are June and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).

Average cloud cover in December
Rio Rico, 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 7).

Average visibility in December
Rio Rico, 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).