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 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
December, known for its average high temperature of 61.9°F (16.6°C) and an average low temperature of 44.6°F (7°C), is the coldest month.Humidity
December is the most humid month, with an average relative humidity of 45%.Rainfall
In December, the rain falls for 6.4 days. Throughout December, 0.87" (22mm) of precipitation is accumulated. Throughout the year, there are 71.5 rainfall days, and 9.72" (247mm) of precipitation is accumulated.Daylight
With an average of 10h and 6min of daylight, December has the shortest days of the year in Rillito.On the first day of December, sunrise is at 7:07 am and sunset at 5:18 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:29 pm MST.
Sunshine
The month with the least sunshine is December, with an average of 6.8h of sunshine.UV index
The month with the lowest UV index in Rillito is December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, a daily maximum UV index of 3 leads to the following instructions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Rillito?
What are the temperatures in Rillito in December?
What is the most humid month in Rillito?
What is the average humidity in December in Rillito?
How many days does it rain in December in Rillito?
What is the month with the shortest days in Rillito?
What is the average length of the day in December in Rillito?
When are sunrise and sunset in December in Rillito?
What is the month with the least sunshine in Rillito?
How many hours of sunshine does Rillito have in December?
What is the month with the lowest UV index in Rillito?
What is the UV index reading in December in Rillito?
Average temperature in December
Rillito, AZ
- Average high temperature in December: 61.9°F
The warmest month (with the highest average high temperature) is June (99°F).
The month with the lowest average high temperature is December (61.9°F).
- Average low temperature in December: 44.6°F
The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is December (44.6°F).
Average pressure in December
Rillito, AZ
- Average pressure in December: 30.04"Hg
The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.82"Hg).
Average wind speed in December
Rillito, AZ
- Average wind speed in December: 5.5mph
The windiest months (with the highest average wind speed) are April and May (7.9mph).
The calmest months (with the lowest average wind speed) are January and December (5.5mph).
Average humidity in December
Rillito, AZ
- Average humidity in December: 45%
The month with the highest relative humidity is December (45%).
The month with the lowest relative humidity is June (18%).
Average rainfall in December
Rillito, AZ
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is August (1.77").
The driest months (with the least rainfall) are April and May (0.2").
Average rainfall days in December
Rillito, AZ
- Average rainfall days in December: 6.4 days
The month with the highest number of rainy days is July (13.8 days).
The month with the least rainy days is May (2.4 days).
Average daylight in December /
Average sunshine in December
Rillito, AZ
- Average daylight in December: 10h and 1min
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 5min
The month with the most sunshine is August (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in December
Rillito, AZ
- Average sunshine days in December: 24.2 days
The month with the most sunshine days is May (28.2 days).
The month with the least sunshine days is July (13 days).
Average UV index in December
Rillito, 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
Rillito, AZ
- Average cloud cover in December: 21
The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 7).
Average visibility in December
Rillito, 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).
Rillito, Arizona, USA
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