December weather forecastVilhena, Brazil
December
Weather in December
The first month of the summer, December, is also a moderately hot month in Vilhena, Brazil, with an average temperature fluctuating between 21.1°C (70°F) and 28.1°C (82.6°F).Temperature
On the advent of December, Vilhena's average high-temperature exhibits a minor adjustment to a still moderately hot 28.1°C (82.6°F) from November's 29.5°C (85.1°F). Vilhena encounters an average low-temperature of 21.1°C (70°F) during December nights.Heat index
For December, the heat index is evaluated at a hot 34°C (93.2°F). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.Understanding the heat index involves considering values for shaded locales with light wind. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
Humidity
In Vilhena, the average relative humidity in December is 88%.Rainfall
December is the month with the most rainfall. Rain falls for 29 days and accumulates 266mm (10.47") of precipitation.Daylight
The month with the longest days in Vilhena is December, with an average of 12h and 54min of daylight.On the first day of the month, sunrise is at 05:25 and sunset at 18:14. On the last day of December, in Vilhena, sunrise is at 05:37 and sunset at 18:29 -04.
Sunshine
In Vilhena, the average sunshine in December is 7h.UV index
The average daily maximum UV index in December in Vilhena is 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.Note: In December, the maximum UV index of 6 translates into these guidelines:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Vilhena, Brazil
- Average high temperature in December: 28.1°C
The warmest month (with the highest average high temperature) is September (34.1°C).
The month with the lowest average high temperature is February (27.3°C).
- Average low temperature in December: 21.1°C
The month with the highest average low temperature is October (21.4°C).
The coldest month (with the lowest average low temperature) is July (17.3°C).
Average pressure in December
Vilhena, Brazil
- Average pressure in December: 1009.7mbar
The month with the highest atmospheric pressure is July (1014.3mbar).
The month with the lowest atmospheric pressure is November (1009mbar).
Average wind speed in December
Vilhena, Brazil
- Average wind speed in December: 4.6km/h
The windiest month (with the highest average wind speed) is August (5.3km/h).
The calmest month (with the lowest average wind speed) is March (4km/h).
Average humidity in December
Vilhena, Brazil
- Average humidity in December: 88%
The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is August (49%).
Average rainfall in December
Vilhena, Brazil
- Average rainfall in December: 266mm
The wettest month (with the highest rainfall) is December (266mm).
The driest month (with the least rainfall) is July (4mm).
Average rainfall days in December
Vilhena, Brazil
- Average rainfall days in December: 29 days
The month with the highest number of rainy days is January (29.8 days).
The month with the least rainy days is July (3.6 days).
Average daylight in December /
Average sunshine in December
Vilhena, Brazil
- Average daylight in December: 12h and 54min
The month with the longest days is December (Average daylight: 12h and 54min).
The month with the shortest days is June (Average daylight: 11h and 24min).
- Average sunshine in December: 7h and 0min
The months with the most sunshine are September and October (Average sunshine: 8h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).
Average sunshine days in December
Vilhena, Brazil
- Average sunshine days in December: 1.6 days
The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is February (0.5 days).
Average UV index in December
Vilhena, 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 January and February (UV index 5).
Average cloud cover in December
Vilhena, Brazil
- Average cloud cover in December: 66
The month with the most cloud cover is February (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in December
Vilhena, Brazil
- Average visibility in December: 6km
The months with the highest visibility are July, August and September (10km).
The months with the lowest visibility are January, February, March and December (6km).
