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 warmest period tends to be December, when average temperatures fluctuate between a high of 27.4°C (81.3°F) and a low of 17.5°C (63.5°F).Heat index
The heat index value for December is evaluated at a hot 31°C (87.8°F). Enduring exposure and unrelenting activity might cause a state of weariness, potentially leading to heat cramps.One should consider that heat index numbers are for shaded settings and light wind. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant to children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
Humidity
In São José da Boa Vista, the average relative humidity in December is 82%.Rainfall
In São José da Boa Vista, in December, during 26.3 rainfall days, 152mm (5.98") of precipitation is typically accumulated. Throughout the year, in São José da Boa Vista, Brazil, there are 218.2 rainfall days, and 1124mm (44.25") 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 December, sunrise is at 05:22 and sunset at 18:53. On the last day of the month, sunrise is at 05:34 and sunset at 19:09 -03.
Sunshine
In December, the average sunshine in São José da Boa Vista is 7.7h.UV index
The average daily maximum UV index in December is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 5 in December translates into this advice:
Put precautions into practice - Guidance to elude sunburn is provided. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the hottest in São José da Boa Vista?
What are the temperatures in São José da Boa Vista in December?
What is the average humidity in December in São José da Boa Vista?
How much does it rain in São José da Boa Vista in December?
When are the longest days in São José da Boa Vista?
What is the average length of the day in December in São José da Boa Vista?
What time are sunrise and sunset in December in São José da Boa Vista?
How long on average sun shines in December in São José da Boa Vista?
What is the UV index intensity in December in São José da Boa Vista?
Average temperature in December
São José da Boa Vista, Brazil
- Average high temperature in December: 27.4°C
The warmest month (with the highest average high temperature) is December (27.4°C).
The month with the lowest average high temperature is June (20.2°C).
- Average low temperature in December: 17.5°C
The month with the highest average low temperature is January (18°C).
The coldest month (with the lowest average low temperature) is June (11.2°C).
Average pressure in December
São José da Boa Vista, Brazil
- Average pressure in December: 1011.8mbar
The month with the highest atmospheric pressure is July (1019.9mbar).
The month with the lowest atmospheric pressure is December (1011.8mbar).
Average wind speed in December
São José da Boa Vista, Brazil
- Average wind speed in December: 7.2km/h
The windiest month (with the highest average wind speed) is November (8.1km/h).
The calmest month (with the lowest average wind speed) is June (6.1km/h).
Average humidity in December
São José da Boa Vista, Brazil
- Average humidity in December: 82%
The months with the highest relative humidity are May and June (87%).
The month with the lowest relative humidity is September (75%).
Average rainfall in December
São José da Boa Vista, Brazil
- Average rainfall in December: 152mm
The wettest month (with the highest rainfall) is January (205mm).
The driest month (with the least rainfall) is August (38mm).
Average rainfall days in December
São José da Boa Vista, Brazil
- Average rainfall days in December: 26.3 days
The month with the highest number of rainy days is January (27.7 days).
The month with the least rainy days is August (8.1 days).
Average daylight in December /
Average sunshine in December
São José da Boa Vista, Brazil
- Average daylight in December: 13h and 4min
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 42min).
- Average sunshine in December: 7h and 4min
The month with the most sunshine is August (Average sunshine: 8h and 42min).
The month with the least sunshine is January (Average sunshine: 7h and 12min).
Average sunshine days in December
São José da Boa Vista, Brazil
- Average sunshine days in December: 3.5 days
The month with the most sunshine days is August (20 days).
The month with the least sunshine days is February (1.9 days).
Average UV index in December
São José da Boa Vista, Brazil
- Average UV index in December: 5
The months with the highest UV index are January and March (UV index 6).
The month with the lowest UV index is May (UV index 4).
Average cloud cover in December
São José da Boa Vista, Brazil
- Average cloud cover in December: 54
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
São José da Boa Vista, Brazil
- Average visibility in December: 7km
The months with the highest visibility are August, September, October and November (8km).
The months with the lowest visibility are May and June (6km).
