December weather forecastBarretos, Brazil
December
Weather in December
The first month of the summer, December, is still a warm month in Barretos, Brazil, with an average temperature varying between 28.7°C (83.7°F) and 20.5°C (68.9°F).Temperature
The onset of December manifests an average high-temperature of a still moderately hot 28.7°C (83.7°F), demonstrating a minor variation from the preceding month. Throughout December, the nighttime temperature averages to an agreeable 20.5°C (68.9°F).Heat index
December's heat index is estimated at a very hot 35°C (95°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.One should consider that heat index numbers are for shaded settings and light wind. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'real feel', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. When body heat isn't effectively managed, risks of dehydration and overheating amplify.
Humidity
In Barretos, the average relative humidity in December is 84%.Rainfall
In Barretos, during December, the rain falls for 27.6 days and regularly aggregates up to 183mm (7.2") of precipitation. In Barretos, during the entire year, the rain falls for 211.9 days and collects up to 1351mm (53.19") of precipitation.Daylight
December has the longest days of the year in Barretos, with an average of 13h and 24min of daylight.On the first day of December, sunrise is at 05:24 and sunset at 18:42. On the last day of the month, sunrise is at 05:36 and sunset at 18:58 -03.
Sunshine
In December, the average sunshine is 7.4h.UV index
The months with the lowest UV index are January, February, April, May and December, with an average maximum UV index of 5. A UV Index reading 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 during December translates into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Barretos, Brazil
- Average high temperature in December: 28.7°C
The warmest month (with the highest average high temperature) is September (32.5°C).
The month with the lowest average high temperature is June (25.2°C).
- Average low temperature in December: 20.5°C
The month with the highest average low temperature is October (20.6°C).
The coldest month (with the lowest average low temperature) is June (15.5°C).
Average pressure in December
Barretos, Brazil
- Average pressure in December: 1010.7mbar
The month with the highest atmospheric pressure is July (1018.5mbar).
The month with the lowest atmospheric pressure is November (1010.6mbar).
Average wind speed in December
Barretos, Brazil
- Average wind speed in December: 7.4km/h
The windiest month (with the highest average wind speed) is September (9.7km/h).
The calmest month (with the lowest average wind speed) is February (6.5km/h).
Average humidity in December
Barretos, Brazil
- Average humidity in December: 84%
The months with the highest relative humidity are January, February and March (88%).
The month with the lowest relative humidity is September (48%).
Average rainfall in December
Barretos, Brazil
- Average rainfall in December: 183mm
The wettest month (with the highest rainfall) is January (221mm).
The driest months (with the least rainfall) are July and August (12mm).
Average rainfall days in December
Barretos, Brazil
- Average rainfall days in December: 27.6 days
The month with the highest number of rainy days is January (27.7 days).
The month with the least rainy days is August (3.9 days).
Average daylight in December /
Average sunshine in December
Barretos, Brazil
- Average daylight in December: 13h and 24min
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 54min).
- Average sunshine in December: 7h and 24min
The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 6h and 54min).
Average sunshine days in December
Barretos, Brazil
- Average sunshine days in December: 2.6 days
The month with the most sunshine days is August (26.5 days).
The month with the least sunshine days is February (2.1 days).
Average UV index in December
Barretos, Brazil
- Average UV index in December: 5
The months with the highest UV index are March, June, July, August, September, October and November (UV index 6).
The months with the lowest UV index are January, February, April, May and December (UV index 5).
Average cloud cover in December
Barretos, Brazil
- Average cloud cover in December: 54
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in December
Barretos, Brazil
- Average visibility in December: 7km
The months with the highest visibility are July, August and September (10km).
The months with the lowest visibility are January, February, March, April and December (7km).
