December weather forecastSurprise, AZ
December
Weather in December
December marks the onset of winter in the City of Surprise. The temperatures dip further, with a high of 61.7°F (16.5°C), preparing residents for cozy indoor festivities. Short daylight hours and increased humidity indicate the year's final stretch. Even as the year ends, the pleasant weather continues to surprise residents, ensuring a warm welcome to the New Year.Temperature
In Surprise, the month of December is known for its lowest average temperatures, reaching a high of 61.7°F (16.5°C) and a low of 46°F (7.8°C).Humidity
With an average relative humidity of 44%, December is the most humid month.Rainfall
In Surprise, Arizona, in December, it is raining for 5.9 days, with typically 0.75" (19mm) of accumulated precipitation. Throughout the year, there are 60.7 rainfall days, and 8.62" (219mm) of precipitation is accumulated.Daylight
The month with the shortest days is December, with an average of 10h and 0min of daylight.On the first day of the month, sunrise is at 7:16 am and sunset at 5:21 pm. On the last day of December, in Surprise, sunrise is at 7:33 am and sunset at 5:31 pm MST.
Sunshine
With an average of 6.8h of sunshine, December has the least sunshine of the year.UV index
The month with the lowest UV index in Surprise is December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: An average UV index of 3 in December transforms into this advice:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Surprise, AZ
- Average high temperature in December: 61.7°F
The warmest month (with the highest average high temperature) is July (101.7°F).
The month with the lowest average high temperature is December (61.7°F).
- Average low temperature in December: 46°F
The month with the highest average low temperature is August (83.1°F).
The coldest months (with the lowest average low temperature) are January and December (46°F).
Average pressure in December
Surprise, AZ
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.8"Hg).
Average wind speed in December
Surprise, AZ
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest month (with the lowest average wind speed) is December (4.7mph).
Average humidity in December
Surprise, AZ
- Average humidity in December: 44%
The month with the highest relative humidity is December (44%).
The month with the lowest relative humidity is June (17%).
Average rainfall in December
Surprise, AZ
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is July (1.3").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days in December
Surprise, AZ
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is July (11.4 days).
The month with the least rainy days is June (1.2 days).
Average daylight in December /
Average sunshine in December
Surprise, AZ
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
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
Surprise, AZ
- Average sunshine days in December: 24.5 days
The month with the most sunshine days is May (28.2 days).
The month with the least sunshine days is July (15.2 days).
Average UV index in December
Surprise, 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
Surprise, AZ
- Average cloud cover in December: 20
The month with the most cloud cover is December (Cloud cover 20).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility in December
Surprise, 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).
