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 sea temperature 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
December's onset sees an average high-temperature of a still tropical 31.9°C (89.4°F), exhibiting a slight fluctuation from the previous month. São João de Pirabas's nights in December experience an average temperature drop to a warm 23.2°C (73.8°F).Heat index
In December, the heat index is estimated at an extremely hot 43°C (109.4°F). Stay watchful: Heat exhaustion along with heat cramps are likely. Ongoing effort may cause heatstroke.Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', binds temperature metrics with humidity values to give a sense of the actual warmth. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are quite important for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.
Humidity
In December, the average relative humidity is 78%.Rainfall
In São João de Pirabas, Brazil, in December, during 24.8 rainfall days, 110mm (4.33") of precipitation is typically accumulated. In São João de Pirabas, during the entire year, the rain falls for 307.3 days and collects up to 1390mm (54.72") of precipitation.Sea temperature
In São João de Pirabas, Brazil, the average seawater temperature in December is 28.4°C (83.1°F).Note: Swimming, diving, and other water activities in the temperature range of 25°C (77°F) to 29°C (84.2°F) are perceived as very enjoyable and comfortable for prolonged durations.
Daylight
The month with the longest days is December, with an average of 12h and 12min of daylight.On the first day of December, sunrise is at 05:53 and sunset at 18:02. On the last day of the month, sunrise is at 06:06 and sunset at 18:17 -03.
Sunshine
The average sunshine in December in São João de Pirabas is 7.4h.UV index
January through June, August, November and December, with an average maximum UV index of 6, are months with the lowest UV index in São João de Pirabas. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for average individuals.Note: In December, the maximum UV index of 6 suggests these recommendations:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Warning! Reflective surfaces like sand and water amplify the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is December in São João de Pirabas?
What is the average humidity in December in São João de Pirabas?
How many days does it rain in December in São João de Pirabas?
What is the sea water temperature in December in São João de Pirabas?
When are the longest days in São João de Pirabas?
How many hours of daylight does São João de Pirabas have in December?
When are sunrise and sunset in December in São João de Pirabas?
How many hours of sunshine does São João de Pirabas have in December?
When is the lowest UV index in São João de Pirabas?
What is the UV index intensity in December in São João de Pirabas?
Average temperature in December
São João de Pirabas, Brazil
- Average high temperature in December: 31.9°C
The warmest months (with the highest average high temperature) are October and November (33.3°C).
The months with the lowest average high temperature are March and April (29.8°C).
- Average low temperature in December: 23.2°C
The month with the highest average low temperature is December (23.2°C).
The coldest month (with the lowest average low temperature) is July (21.9°C).
Average pressure in December
São João de Pirabas, Brazil
- Average pressure in December: 1009.8mbar
The month with the highest atmospheric pressure is July (1012.7mbar).
The month with the lowest atmospheric pressure is November (1009.3mbar).
Average wind speed in December
São João de Pirabas, Brazil
- Average wind speed in December: 7.2km/h
The windiest month (with the highest average wind speed) is November (7.7km/h).
The calmest month (with the lowest average wind speed) is April (4.9km/h).
Average humidity in December
São João de Pirabas, Brazil
- Average humidity in December: 78%
The months with the highest relative humidity are April and May (90%).
The month with the lowest relative humidity is November (75%).
Average rainfall in December
São João de Pirabas, Brazil
- Average rainfall in December: 110mm
The wettest month (with the highest rainfall) is March (238mm).
The driest month (with the least rainfall) is October (31mm).
Average rainfall days in December
São João de Pirabas, Brazil
- Average rainfall days in December: 24.8 days
The month with the highest number of rainy days is March (30.5 days).
The month with the least rainy days is November (16.1 days).
Average sea temperature in December
São João de Pirabas, Brazil
- Average sea temperature in December: 28.4°C
The best months for swimming (with the highest average sea temperature) are January, March, April and May (28.8°C).
The coldest months (with the lowest average sea temperature) are September and October (28.3°C).
Average daylight in December /
Average sunshine in December
São João de Pirabas, Brazil
- Average daylight in December: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 12min).
The month with the shortest days is June (Average daylight: 12h and 6min).
- Average sunshine in December: 7h and 2min
The month with the most sunshine is September (Average sunshine: 8h and 30min).
The months with the least sunshine are February and March (Average sunshine: 5h and 48min).
Average sunshine days in December
São João de Pirabas, Brazil
- Average sunshine days in December: 3.9 days
The month with the most sunshine days is November (9.8 days).
The month with the least sunshine days is April (0.3 days).
Average UV index in December
São João de Pirabas, Brazil
- Average UV index in December: 6
The months with the highest UV index are July, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, August, November and December (UV index 6).
Average cloud cover in December
São João de Pirabas, Brazil
- Average cloud cover in December: 50
The month with the most cloud cover is April (Cloud cover 68).
The months with the least cloud cover are September, October and November (Cloud cover 40).
Average visibility in December
São João de Pirabas, Brazil
- Average visibility in December: 8km
The month with the highest visibility is November (9km).
The months with the lowest visibility are March, April, May, June and July (6km).
