December weather forecastRegistro, Brazil
December
Weather in December
The first month of the summer, December, is a tropical month in Registro, Brazil, with an average temperature varying between 19.9°C (67.8°F) and 30.5°C (86.9°F).Temperature
December brings an average high-temperature of a hot 30.5°C (86.9°F), nearly identical to the preceding month. During December, Registro records an average temperature of 19.9°C (67.8°F) at night.Heat index
For most parts of December, the heat index is computed to be an extremely hot 40°C (104°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.The metrics for the heat index are tailored for both shady environments and light winds. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.
Humidity
December is the least humid month in Registro, Brazil, with an average relative humidity of 82%.Rainfall
In Registro, during December, the rain falls for 21.9 days and regularly aggregates up to 105mm (4.13") of precipitation. Throughout the year, there are 210 rainfall days, and 893mm (35.16") of precipitation is accumulated.Daylight
With an average of 13h and 36min of daylight, December has the longest days of the year.On the first day of the month, sunrise is at 05:14 and sunset at 18:47. On the last day of December, in Registro, sunrise is at 05:25 and sunset at 19:03 -03.
Sunshine
In December, the average sunshine in Registro is 6.6h.UV index
January through March, October through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 6 during December translates into the following recommendations:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Registro, Brazil
- Average high temperature in December: 30.5°C
The warmest month (with the highest average high temperature) is February (31°C).
The months with the lowest average high temperature are June and July (23.3°C).
- Average low temperature in December: 19.9°C
The month with the highest average low temperature is January (20.8°C).
The coldest month (with the lowest average low temperature) is July (13.5°C).
Average pressure in December
Registro, Brazil
- Average pressure in December: 1011.6mbar
The month with the highest atmospheric pressure is July (1020.1mbar).
The month with the lowest atmospheric pressure is December (1011.6mbar).
Average wind speed in December
Registro, Brazil
- Average wind speed in December: 5km/h
The windiest months (with the highest average wind speed) are October, November and December (5km/h).
The calmest months (with the lowest average wind speed) are May and June (4km/h).
Average humidity in December
Registro, Brazil
- Average humidity in December: 82%
The month with the highest relative humidity is June (87%).
The month with the lowest relative humidity is December (82%).
Average rainfall in December
Registro, Brazil
- Average rainfall in December: 105mm
The wettest month (with the highest rainfall) is January (131mm).
The driest month (with the least rainfall) is August (37mm).
Average rainfall days in December
Registro, Brazil
- Average rainfall days in December: 21.9 days
The month with the highest number of rainy days is January (24.7 days).
The month with the least rainy days is June (11.3 days).
Average daylight in December /
Average sunshine in December
Registro, Brazil
- Average daylight in December: 13h and 36min
The month with the longest days is December (Average daylight: 13h and 36min).
The month with the shortest days is June (Average daylight: 10h and 36min).
- Average sunshine in December: 6h and 36min
The months with the most sunshine are February and April (Average sunshine: 6h and 54min).
The months with the least sunshine are October and November (Average sunshine: 5h and 54min).
Average sunshine days in December
Registro, Brazil
- Average sunshine days in December: 5.4 days
The month with the most sunshine days is June (16.9 days).
The month with the least sunshine days is January (4 days).
Average UV index in December
Registro, Brazil
- Average UV index in December: 6
The months with the highest UV index are January, February, March, October, November and December (UV index 6).
The months with the lowest UV index are April, May, June, July, August and September (UV index 5).
Average cloud cover in December
Registro, Brazil
- Average cloud cover in December: 63
The month with the most cloud cover is November (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 56).
Average visibility in December
Registro, Brazil
- Average visibility in December: 7km
The months with the highest visibility are September and December (7km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, October and November (6km).
