December weather forecastFountain Hills, AZ
December
Weather in December
December in Fountain Hills sees the swift entry of winter, transitioning away from the mild conditions of November. The lowest temperatures of the year, between 44.2°F (6.8°C) to 60.3°F (15.7°C), mark the arrival of the coolest month. Receding daylight and rising humidity levels supplement the atmosphere, bringing about increased rainfall days. December is characterised by shorter daylight hours and increased cloud cover, although the sun continues to peek through contributing to the city's unique winter charm. The city adorns a festive air, accompanied by the mild crispness of the weather, wrapping the year beautifully.Temperature
The lowest temperatures are recorded in December, with averages reaching a high of 60.3°F (15.7°C) and a low of 44.2°F (6.8°C).Humidity
The most humid month is December, with an average relative humidity of 46%.Rainfall
In December, the rain falls for 6.8 days. Throughout December, 1.02" (26mm) of precipitation is accumulated. Throughout the year, there are 67.9 rainfall days, and 10" (254mm) of precipitation is accumulated.Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year in Fountain Hills.On the first day of the month, sunrise is at 7:13 am and sunset at 5:18 pm. On the last day of December, in Fountain Hills, sunrise is at 7:31 am and sunset at 5:29 pm MST.
Sunshine
The month with the least sunshine in Fountain Hills, Arizona, is December, with an average of 6.8h of sunshine.UV index
The month with the lowest UV index is December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 3 during December translates into the following directions:
Ensure safety - Sun damage prevention is strongly urged. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Fountain Hills, AZ
- Average high temperature in December: 60.3°F
The warmest month (with the highest average high temperature) is July (99.1°F).
The month with the lowest average high temperature is December (60.3°F).
- Average low temperature in December: 44.2°F
The month with the highest average low temperature is August (80.4°F).
The coldest month (with the lowest average low temperature) is December (44.2°F).
Average pressure in December
Fountain Hills, AZ
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in December
Fountain Hills, AZ
- Average wind speed in December: 4.8mph
The windiest months (with the highest average wind speed) are April and May (6.5mph).
The calmest month (with the lowest average wind speed) is December (4.8mph).
Average humidity in December
Fountain Hills, AZ
- Average humidity in December: 46%
The month with the highest relative humidity is December (46%).
The month with the lowest relative humidity is June (17%).
Average rainfall in December
Fountain Hills, AZ
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is July (1.54").
The driest months (with the least rainfall) are May and June (0.12").
Average rainfall days in December
Fountain Hills, AZ
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is July (12.2 days).
The month with the least rainy days is June (1.6 days).
Average daylight in December /
Average sunshine in December
Fountain Hills, AZ
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 6h and 48min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in December
Fountain Hills, AZ
- Average sunshine days in December: 23.2 days
The month with the most sunshine days is May (28 days).
The month with the least sunshine days is July (14 days).
Average UV index in December
Fountain Hills, 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
Fountain Hills, 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 6).
Average visibility in December
Fountain Hills, 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).
