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
As December takes its course, São João Nepomuceno's average high-temperature registers at a still warm 27.9°C (82.2°F), closely aligning with the preceding month. December nights in São João Nepomuceno observe an average temperature dip to a comfortable 19.6°C (67.3°F).Heat index
The heat index value for December is appraised at a tropical 33°C (91.4°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.It is important to note that the heat index values are for shaded areas and light wind scenarios. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Humidity
In December, the average relative humidity in São João Nepomuceno is 88%.Rainfall
December is the month with the most rainfall in São João Nepomuceno. Rain falls for 27.9 days and accumulates 240mm (9.45") of precipitation.Daylight
The month with the longest days in São João Nepomuceno, Brazil, is December, with an average of 13h and 24min of daylight.On the first day of December, sunrise is at 05:00 and sunset at 18:21. On the last day of the month, sunrise is at 05:12 and sunset at 18:38 -03.
Sunshine
In São João Nepomuceno, the average sunshine in December is 7.1h.UV index
The months with the highest UV index are January, August through October and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.Note: In December, a regular UV index of 6 translates into these guidelines:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in São João Nepomuceno?
What is the average humidity in December in São João Nepomuceno?
What is the wettest month in São João Nepomuceno?
How many days does it rain in December in São João Nepomuceno?
When are the longest days in São João Nepomuceno?
How many hours of daylight does São João Nepomuceno have in December?
When is the sunrise / sunset in December in São João Nepomuceno?
How long on average sun shines in December in São João Nepomuceno?
What are the months with the highest UV index in São João Nepomuceno?
How high is the UV index in December in São João Nepomuceno?
Average temperature in December
São João Nepomuceno, Brazil
- Average high temperature in December: 27.9°C
The warmest month (with the highest average high temperature) is February (28.6°C).
The month with the lowest average high temperature is June (23.8°C).
- Average low temperature in December: 19.6°C
The months with the highest average low temperature are January and December (19.6°C).
The coldest month (with the lowest average low temperature) is July (14.1°C).
Average pressure in December
São João Nepomuceno, Brazil
- Average pressure in December: 1012.6mbar
The month with the highest atmospheric pressure is July (1021mbar).
The month with the lowest atmospheric pressure is December (1012.6mbar).
Average wind speed in December
São João Nepomuceno, Brazil
- Average wind speed in December: 5.6km/h
The windiest month (with the highest average wind speed) is October (6.6km/h).
The calmest months (with the lowest average wind speed) are March and April (4.7km/h).
Average humidity in December
São João Nepomuceno, Brazil
- Average humidity in December: 88%
The months with the highest relative humidity are March and April (89%).
The month with the lowest relative humidity is September (73%).
Average rainfall in December
São João Nepomuceno, Brazil
- Average rainfall in December: 240mm
The wettest month (with the highest rainfall) is December (240mm).
The driest month (with the least rainfall) is July (13mm).
Average rainfall days in December
São João Nepomuceno, Brazil
- Average rainfall days in December: 27.9 days
The month with the highest number of rainy days is December (27.9 days).
The month with the least rainy days is July (8.3 days).
Average daylight in December /
Average sunshine in December
São João Nepomuceno, Brazil
- Average daylight in December: 13h and 2min
The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 48min).
- Average sunshine in December: 7h and 1min
The months with the most sunshine are February, July and September (Average sunshine: 8h and 12min).
The month with the least sunshine is November (Average sunshine: 6h and 18min).
Average sunshine days in December
São João Nepomuceno, Brazil
- Average sunshine days in December: 1.4 days
The month with the most sunshine days is July (18.7 days).
The month with the least sunshine days is December (1.4 days).
Average UV index in December
São João Nepomuceno, Brazil
- Average UV index in December: 6
The months with the highest UV index are January, August, September, October and December (UV index 6).
The months with the lowest UV index are February, March, April, May, June, July and November (UV index 5).
Average cloud cover in December
São João Nepomuceno, Brazil
- Average cloud cover in December: 59
The month with the most cloud cover is November (Cloud cover 64).
The months with the least cloud cover are August and September (Cloud cover 38).
Average visibility in December
São João Nepomuceno, Brazil
- Average visibility in December: 7km
The month with the highest visibility is September (9km).
The months with the lowest visibility are March, April and May (6km).
