December weather forecastTacna, AZ
December
Weather in December
December, the first month of the winter in Tacna, is still a refreshing month, with an average temperature ranging between min 49.8°F (9.9°C) and max 64.9°F (18.3°C).Temperature
The coldest temperatures occur during December, when averages reach a peak of 64.9°F (18.3°C) and a low of 49.8°F (9.9°C).Humidity
The most humid month is December, with an average relative humidity of 39%.Rainfall
In Tacna, in December, during 3.5 rainfall days, 0.28" (7mm) of precipitation is typically accumulated. In Tacna, during the entire year, the rain falls for 38.1 days and collects up to 3.9" (99mm) of precipitation.Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:20 am and sunset at 5:29 pm. On the last day of December, sunrise is at 7:37 am and sunset at 5:40 pm MST.
Sunshine
December has the least sunshine of the year, with an average of 7.1h of sunshine.UV index
The months with the lowest UV index are November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The daily maximum UV index of 4 in December interprets into the following advice:
Prioritize safety - Recommendations to avert sunburn are shared. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Tacna, AZ
- Average high temperature in December: 64.9°F
The warmest month (with the highest average high temperature) is July (103.8°F).
The month with the lowest average high temperature is December (64.9°F).
- Average low temperature in December: 49.8°F
The month with the highest average low temperature is August (85.6°F).
The coldest months (with the lowest average low temperature) are January and December (49.8°F).
Average pressure in December
Tacna, AZ
- Average pressure in December: 30.03"Hg
The month with the highest atmospheric pressure is January (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.73"Hg).
Average wind speed in December
Tacna, AZ
- Average wind speed in December: 6mph
The windiest month (with the highest average wind speed) is July (8.4mph).
The calmest months (with the lowest average wind speed) are November and December (6mph).
Average humidity in December
Tacna, AZ
- Average humidity in December: 39%
The month with the highest relative humidity is December (39%).
The month with the lowest relative humidity is June (21%).
Average rainfall in December
Tacna, AZ
- Average rainfall in December: 0.28"
The wettest month (with the highest rainfall) is July (0.71").
The driest month (with the least rainfall) is May (0.04").
Average rainfall days in December
Tacna, AZ
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is July (7.6 days).
The month with the least rainy days is May (0.9 days).
Average daylight in December /
Average sunshine in December
Tacna, 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: 7h and 6min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 6min).
Average sunshine days in December
Tacna, AZ
- Average sunshine days in December: 27.4 days
The month with the most sunshine days is May (29.7 days).
The month with the least sunshine days is July (19.8 days).
Average UV index in December
Tacna, AZ
- Average UV index in December: 4
The months with the highest UV index are June, July and August (UV index 8).
The months with the lowest UV index are November and December (UV index 4).
Average cloud cover in December
Tacna, AZ
- Average cloud cover in December: 17
The month with the most cloud cover is December (Cloud cover 17).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility in December
Tacna, 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).
