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 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
December's arrival corresponds with a decrease in average high-temperatures, from November's moderate 59.2°F (15.1°C) to a frosty 47.7°F (8.7°C). An average low-temperature of 30.9°F (-0.6°C) is observed during December nights.Humidity
In December, the average relative humidity is 54%.Rainfall
In Sun Valley, in December, during 5.1 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. Throughout the year, in Sun Valley, there are 74.3 rainfall days, and 7.2" (183mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Sun Valley. In Sun Valley, in December, snow falls for 3.1 days, with typically accumulated 1.3" (33mm) of snow. In Sun Valley, during the entire year, snow falls for 11.2 days and aggregates up to 5.98" (152mm) of snow.Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year in Sun Valley, Arizona.On the first day of December, sunrise is at 7:10 am and sunset at 5:08 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 5:19 pm MST.
Sunshine
December has the least sunshine of the year, with an average of 6.8h of sunshine.UV index
The month with the lowest UV index in Sun Valley is December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Opt for tightly woven and loose clothing to enhance protection from the Sun. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
What is the average December temperature in Sun Valley?
What is the average humidity in December in Sun Valley?
How much does it rain in Sun Valley in December?
How many days does it snow in December in Sun Valley?
What is the month with the shortest days in Sun Valley?
How many hours of daylight does Sun Valley have in December?
What time are sunrise and sunset in December in Sun Valley?
What is the month with the least sunshine in Sun Valley?
How many hours of sunshine does Sun Valley have in December?
What is the month with the lowest UV index in Sun Valley?
What is the UV index intensity in December in Sun Valley?
Average temperature in December
Sun Valley, AZ
- Average high temperature in December: 47.7°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (46.8°F).
- Average low temperature in December: 30.9°F
The month with the highest average low temperature is July (70.5°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).
Average pressure in December
Sun Valley, AZ
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are May and June (29.88"Hg).
Average wind speed in December
Sun Valley, AZ
- Average wind speed in December: 6.9mph
The windiest months (with the highest average wind speed) are April and May (10.6mph).
The calmest month (with the lowest average wind speed) is January (6.1mph).
Average humidity in December
Sun Valley, AZ
- Average humidity in December: 54%
The month with the highest relative humidity is January (59%).
The month with the lowest relative humidity is June (18%).
Average rainfall in December
Sun Valley, AZ
- Average rainfall in December: 0.63"
The wettest month (with the highest rainfall) is July (1.1").
The driest month (with the least rainfall) is June (0.16").
Average rainfall days in December
Sun Valley, AZ
- Average rainfall days in December: 5.1 days
The month with the highest number of rainy days is July (13.3 days).
The months with the least rainy days are June and November (3.4 days).
Average snowfall in December
Sun Valley, AZ
- Average snowfall in December: 1.3"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Sun Valley, AZ
- Average snowfall days in December: 3.1 days
The month with the highest number of snowfall days is December (3.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sun Valley, 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 54min).
- 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
Sun Valley, AZ
- Average sunshine days in December: 23.7 days
The months with the most sunshine days are May, June and November (25.3 days).
The month with the least sunshine days is July (12.8 days).
Average UV index in December
Sun Valley, AZ
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in December
Sun Valley, AZ
- Average cloud cover in December: 23
The month with the most cloud cover is December (Cloud cover 23).
The month with the least cloud cover is June (Cloud cover 9).
Average visibility in December
Sun Valley, 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).
Sun Valley, Arizona, USA
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