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 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
December
Weather in December
Temperature
The transition from November to December sees average high-temperatures adjusting to a hot 30°C (86°F), from a not significantly different 29.4°C (84.9°F). In December, Atalaia Velha experiences an average nighttime temperature of 24.7°C (76.5°F).Heat index
Throughout December, the heat index is appraised at a torrid 36°C (96.8°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.Realize that the values for the heat index are set for shaded places and light winds. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', arises from combining readings of air temperature and relative moisture content. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.
Humidity
The months with the lowest humidity are January through March and December, with an average relative humidity of 73%.Rainfall
In December, the rain falls for 10.8 days. Throughout December, 26mm (1.02") of precipitation is accumulated. Throughout the year, there are 197.6 rainfall days, and 586mm (23.07") of precipitation is accumulated.Daylight
With an average of 12h and 48min of daylight, December has the longest days of the year.On the first day of December, sunrise is at 04:55 and sunset at 17:39. On the last day of the month, sunrise is at 05:08 and sunset at 17:54 -03.
Sunshine
In December, the average sunshine is 8.2h.UV index
January through May, September through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 7 in December interprets into the following recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in December?
What are the least humid months?
What is the average humidity in December?
How much does it rain in December?
When are the longest days?
How many hours of daylight does Atalaia Velha have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Atalaia Velha have in December?
When is the highest UV index?
What is the UV index reading in December?
Average temperature in December
Atalaia Velha, Brazil
- Average high temperature in December: 30°C
The warmest month (with the highest average high temperature) is March (30.8°C).
The months with the lowest average high temperature are July and August (26.5°C).
- Average low temperature in December: 24.7°C
The month with the highest average low temperature is March (25.8°C).
The coldest month (with the lowest average low temperature) is September (22.7°C).
Average pressure in December
Atalaia Velha, Brazil
- Average pressure in December: 1012.1mbar
The month with the highest atmospheric pressure is August (1017.4mbar).
The month with the lowest atmospheric pressure is March (1011.9mbar).
Average wind speed in December
Atalaia Velha, Brazil
- Average wind speed in December: 18.4km/h
The windiest month (with the highest average wind speed) is November (18.8km/h).
The calmest month (with the lowest average wind speed) is May (13.7km/h).
Average humidity in December
Atalaia Velha, Brazil
- Average humidity in December: 73%
The months with the highest relative humidity are June and July (79%).
The months with the lowest relative humidity are January, February, March and December (73%).
Average rainfall in December
Atalaia Velha, Brazil
- Average rainfall in December: 26mm
The wettest month (with the highest rainfall) is July (96mm).
The driest month (with the least rainfall) is November (19mm).
Average rainfall days in December
Atalaia Velha, Brazil
- Average rainfall days in December: 10.8 days
The month with the highest number of rainy days is July (24.9 days).
The month with the least rainy days is March (10.6 days).
Average daylight in December /
Average sunshine in December
Atalaia Velha, Brazil
- Average daylight in December: 12h and 5min
The month with the longest days is December (Average daylight: 12h and 48min).
The month with the shortest days is June (Average daylight: 11h and 30min).
- Average sunshine in December: 8h and 1min
The month with the most sunshine is March (Average sunshine: 8h and 24min).
The month with the least sunshine is October (Average sunshine: 7h and 30min).
Average sunshine days in December
Atalaia Velha, Brazil
- Average sunshine days in December: 16.1 days
The month with the most sunshine days is March (19 days).
The month with the least sunshine days is July (3.8 days).
Average UV index in December
Atalaia Velha, Brazil
- Average UV index in December: 7
The months with the highest UV index are January, February, March, April, May, September, October, November and December (UV index 7).
The months with the lowest UV index are June, July and August (UV index 6).
Average cloud cover in December
Atalaia Velha, Brazil
- Average cloud cover in December: 36
The month with the most cloud cover is July (Cloud cover 46).
The month with the least cloud cover is March (Cloud cover 35).
Average visibility in December
Atalaia Velha, Brazil
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
