December weather forecastSaint David, AZ
December
Weather in December
December, the first month of the winter in Saint David, is also a moderate month, with an average temperature fluctuating between 38.5°F (3.6°C) and 57.7°F (14.3°C).Temperature
December, marked by an average high-temperature of 57.7°F (14.3°C) and a low-temperature of 38.5°F (3.6°C), is the coldest month.Humidity
December is the most humid month in Saint David, with an average relative humidity of 48%.Rainfall
In Saint David, in December, during 5.9 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. In Saint David, during the entire year, the rain falls for 76.9 days and collects up to 10.28" (261mm) of precipitation.Snowfall
Months with snowfall are January, February and December. December is the first month it typically snows. Throughout December, in the average 0.4 snowfall days, it receives 0.51" (13mm) of snow. Throughout the year, in Saint David, Arizona, there are 1.4 snowfall days, and 1.69" (43mm) of snow is accumulated.Daylight
The month with the shortest days in Saint David, Arizona, is December, with an average of 10h and 6min of daylight.On the first day of December, sunrise is at 7:03 am and sunset at 5:16 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 5:27 pm MST.
Sunshine
December has the least sunshine of the year in Saint David, with an average of 6.9h of sunshine.UV index
January, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: In December, a daily maximum UV index of 3 leads to the following instructions:
Undertake precautions - Guarding against sun damage is counselled. To guard against the harmful effects of the Sun, minimize exposure during midday. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Saint David, AZ
- Average high temperature in December: 57.7°F
The warmest month (with the highest average high temperature) is June (92.8°F).
The month with the lowest average high temperature is December (57.7°F).
- Average low temperature in December: 38.5°F
The month with the highest average low temperature is July (71.8°F).
The coldest months (with the lowest average low temperature) are January and December (38.5°F).
Average pressure in December
Saint David, AZ
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Saint David, AZ
- Average wind speed in December: 6.3mph
The windiest month (with the highest average wind speed) is April (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in December
Saint David, AZ
- Average humidity in December: 48%
The month with the highest relative humidity is December (48%).
The month with the lowest relative humidity is June (21%).
Average rainfall in December
Saint David, AZ
- Average rainfall in December: 0.63"
The wettest month (with the highest rainfall) is August (2.48").
The driest months (with the least rainfall) are April and May (0.12").
Average rainfall days in December
Saint David, AZ
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is May (2.1 days).
Average snowfall in December
Saint David, AZ
- Average snowfall in December: 0.51"
The month with the highest snowfall is February (0.79").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Saint David, AZ
- Average snowfall days in December: 0.4 days
The months with the highest number of snowfall days are January and February (0.5 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Saint David, 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 August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in December
Saint David, AZ
- Average sunshine days in December: 24.4 days
The month with the most sunshine days is May (28.4 days).
The month with the least sunshine days is July (9.4 days).
Average UV index in December
Saint David, AZ
- Average UV index in December: 3
The months with the highest UV index are May, June, July 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
Saint David, AZ
- Average cloud cover in December: 20
The months with the most cloud cover are July and December (Cloud cover 20).
The month with the least cloud cover is May (Cloud cover 7).
Average visibility in December
Saint David, 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).
