December weather forecastBarra do Mendes, Brazil
December
Weather in December
December, the first month of the summer in Barra do Mendes, is still a tropical month, with an average temperature fluctuating between 20.3°C (68.5°F) and 30.5°C (86.9°F).Temperature
Barra do Mendes records a slight change with December's average high-temperatures adjusting to a still tropical 30.5°C (86.9°F) from November's 30.7°C (87.3°F). Throughout December nights, Barra do Mendes registers an average low-temperature of 20.3°C (68.5°F).Heat index
The heat index in December is estimated at a sweltering 35°C (95°F). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.Heat index values are typically calculated for conditions of shade and a light breeze. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', gives an indication of how one might feel in terms of heat after considering humidity. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.
Humidity
In December, the average relative humidity is 64%.Rainfall
In December, the rain falls for 14.6 days. Throughout December, 78mm (3.07") of precipitation is accumulated. Throughout the year, there are 110.5 rainfall days, and 525mm (20.67") of precipitation is accumulated.Daylight
December has the longest days of the year, with an average of 12h and 48min of daylight.On the first day of December, sunrise is at 05:14 and sunset at 18:00. On the last day of the month, sunrise is at 05:27 and sunset at 18:15 -03.
Sunshine
In December, the average sunshine in Barra do Mendes is 10.3h.UV index
January through August and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A daily high UV index of 6 in December leads to these guidelines:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Barra do Mendes, Brazil
- Average high temperature in December: 30.5°C
The warmest month (with the highest average high temperature) is October (31.5°C).
The month with the lowest average high temperature is July (27.2°C).
- Average low temperature in December: 20.3°C
The month with the highest average low temperature is November (20.7°C).
The coldest month (with the lowest average low temperature) is July (17.2°C).
Average pressure in December
Barra do Mendes, Brazil
- Average pressure in December: 1012mbar
The month with the highest atmospheric pressure is July (1017.6mbar).
The month with the lowest atmospheric pressure is November (1011.7mbar).
Average wind speed in December
Barra do Mendes, Brazil
- Average wind speed in December: 14.8km/h
The windiest months (with the highest average wind speed) are August and September (21.3km/h).
The calmest month (with the lowest average wind speed) is March (13.6km/h).
Average humidity in December
Barra do Mendes, Brazil
- Average humidity in December: 64%
The month with the highest relative humidity is April (71%).
The months with the lowest relative humidity are September and October (56%).
Average rainfall in December
Barra do Mendes, Brazil
- Average rainfall in December: 78mm
The wettest month (with the highest rainfall) is February (90mm).
The driest months (with the least rainfall) are June, July and August (2mm).
Average rainfall days in December
Barra do Mendes, Brazil
- Average rainfall days in December: 14.6 days
The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (1.7 days).
Average daylight in December /
Average sunshine in December
Barra do Mendes, Brazil
- Average daylight in December: 12h and 48min
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 24min).
- Average sunshine in December: 10h and 18min
The months with the most sunshine are January and February (Average sunshine: 10h and 30min).
The month with the least sunshine is July (Average sunshine: 6h and 42min).
Average sunshine days in December
Barra do Mendes, Brazil
- Average sunshine days in December: 13.8 days
The month with the most sunshine days is September (24.2 days).
The month with the least sunshine days is February (10.3 days).
Average UV index in December
Barra do Mendes, Brazil
- Average UV index in December: 6
The months with the highest UV index are September, October and November (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August and December (UV index 6).
Average cloud cover in December
Barra do Mendes, Brazil
- Average cloud cover in December: 33
The month with the most cloud cover is April (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 21).
Average visibility in December
Barra do Mendes, 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).
