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 advent of December observes an average high-temperature of a still warm 27.6°C (81.7°F), nearly identical to November's 28.3°C (82.9°F). São Luís de Montes Belos cools down to an average low-temperature of 19.4°C (66.9°F) throughout the month of December.Heat index
The heat index in December is estimated at a tropical 32°C (89.6°F). Extended exposure and activity might lead to tiredness, potentially resulting in heat cramps.Note that heat index values are valued for light wind and location in the shade. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are essentially critical for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Humidity
In São Luís de Montes Belos, the average relative humidity in December is 87%.Rainfall
The month with the most rainfall is December, when the rain falls for 29.3 days and typically aggregates up to 199mm (7.83") of precipitation.Daylight
With an average of 13h and 6min of daylight, December has the longest days of the year.On the first day of the month, sunrise is at 05:39 and sunset at 18:42. On the last day of December, in São Luís de Montes Belos, sunrise is at 05:51 and sunset at 18:57 -03.
Sunshine
In São Luís de Montes Belos, Brazil, the average sunshine in December is 6.8h.UV index
In São Luís de Montes Belos, Brazil, the average daily maximum UV index in December is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 6 during December translates into the following recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in São Luís de Montes Belos?
What is the average humidity in December in São Luís de Montes Belos?
What is the wettest month in São Luís de Montes Belos?
How much does it rain in São Luís de Montes Belos in December?
When are the longest days in São Luís de Montes Belos?
How many hours of daylight does São Luís de Montes Belos have in December?
What time are sunrise and sunset in December in São Luís de Montes Belos?
How long on average sun shines in December in São Luís de Montes Belos?
What is the UV index intensity in December in São Luís de Montes Belos?
Average temperature in December
São Luís de Montes Belos, Brazil
- Average high temperature in December: 27.6°C
The warmest month (with the highest average high temperature) is September (34.1°C).
The month with the lowest average high temperature is May (27.1°C).
- Average low temperature in December: 19.4°C
The month with the highest average low temperature is September (21°C).
The coldest months (with the lowest average low temperature) are June and July (16.6°C).
Average pressure in December
São Luís de Montes Belos, Brazil
- Average pressure in December: 1011mbar
The month with the highest atmospheric pressure is July (1016.6mbar).
The month with the lowest atmospheric pressure is November (1010.5mbar).
Average wind speed in December
São Luís de Montes Belos, Brazil
- Average wind speed in December: 6.2km/h
The windiest month (with the highest average wind speed) is August (8.9km/h).
The calmest month (with the lowest average wind speed) is March (5.3km/h).
Average humidity in December
São Luís de Montes Belos, Brazil
- Average humidity in December: 87%
The month with the highest relative humidity is March (89%).
The month with the lowest relative humidity is August (39%).
Average rainfall in December
São Luís de Montes Belos, Brazil
- Average rainfall in December: 199mm
The wettest month (with the highest rainfall) is December (199mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in December
São Luís de Montes Belos, Brazil
- Average rainfall days in December: 29.3 days
The month with the highest number of rainy days is December (29.3 days).
The month with the least rainy days is August (0.8 days).
Average daylight in December /
Average sunshine in December
São Luís de Montes Belos, Brazil
- Average daylight in December: 13h and 1min
The month with the longest days is December (Average daylight: 13h and 6min).
The month with the shortest days is June (Average daylight: 11h and 12min).
- Average sunshine in December: 6h and 5min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 42min).
Average sunshine days in December
São Luís de Montes Belos, Brazil
- Average sunshine days in December: 1.8 days
The month with the most sunshine days is July (30.1 days).
The month with the least sunshine days is February (0.9 days).
Average UV index in December
São Luís de Montes Belos, Brazil
- Average UV index in December: 6
The months with the highest UV index are August and September (UV index 7).
The months with the lowest UV index are February and March (UV index 5).
Average cloud cover in December
São Luís de Montes Belos, Brazil
- Average cloud cover in December: 58
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in December
São Luís de Montes Belos, Brazil
- Average visibility in December: 7km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January, February, March, April and December (7km).
