December weather forecastGlendale, AZ
December
Weather in December
December brings the year in Glendale to a close with the coolest temperatures, even dipping to a 46.8°F (8.2°C) nighttime low. On the flip side, a revival in relative humidity to 43% does ensure a resistance against the area's typical dryness. The number of sunshine hours reduces to a minimal 6.8 per day, highlighting the shortest days of the year. A continuing increase in cloud cover provides a subtle insulating effect, mitigating the drop in temperatures. The winter chill in the air prompts locals towards heartening indoor activities, as another year awaits its advent.Temperature
With an average high-temperature of 61.9°F (16.6°C) and an average low-temperature of 46.8°F (8.2°C), December is the coldest month.Humidity
The most humid month in Glendale is December, with an average relative humidity of 43%.Rainfall
In Glendale, Arizona, in December, during 6 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. In Glendale, during the entire year, the rain falls for 59.7 days and collects up to 8.23" (209mm) of precipitation.Daylight
December has the shortest days of the year, with an average of 10h and 0min of daylight.On the first day of the month, sunrise is at 7:15 am and sunset at 5:20 pm. On the last day of December, sunrise is at 7:32 am and sunset at 5:31 pm MST.
Sunshine
The month with the least sunshine in Glendale, Arizona, is December, with an average of 6.8h of sunshine.UV index
The month with the lowest UV index in Glendale is December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 3 during December morphs into the following directions:
Adopt protective measures - Suggestions to resist sunburn are offered. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Glendale, AZ
- Average high temperature in December: 61.9°F
The warmest month (with the highest average high temperature) is July (101.8°F).
The month with the lowest average high temperature is December (61.9°F).
- Average low temperature in December: 46.8°F
The month with the highest average low temperature is August (83.7°F).
The coldest month (with the lowest average low temperature) is December (46.8°F).
Average pressure in December
Glendale, 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
Glendale, AZ
- Average wind speed in December: 4.6mph
The windiest months (with the highest average wind speed) are April and May (6.6mph).
The calmest month (with the lowest average wind speed) is December (4.6mph).
Average humidity in December
Glendale, AZ
- Average humidity in December: 43%
The month with the highest relative humidity is December (43%).
The month with the lowest relative humidity is June (17%).
Average rainfall in December
Glendale, AZ
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is August (1.18").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in December
Glendale, AZ
- Average rainfall days in December: 6 days
The month with the highest number of rainy days is July (10.7 days).
The month with the least rainy days is June (1.1 days).
Average daylight in December /
Average sunshine in December
Glendale, 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
Glendale, AZ
- Average sunshine days in December: 24.3 days
The month with the most sunshine days is May (28.6 days).
The month with the least sunshine days is August (15.9 days).
Average UV index in December
Glendale, 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
Glendale, 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 5).
Average visibility in December
Glendale, 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).
