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
Weather in December
Temperature
December's presence records an average high-temperature of a warm 29.4°C (84.9°F), closely mirroring November's climate. In Alta Floresta, the nighttime temperature averages to a pleasant 21.2°C (70.2°F) during December.Heat index
December's heat index is calculated to be a fiery hot 38°C (100.4°F). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Overheating and potential dehydration arise when body heat gain eclipses its release capability.
Humidity
The average relative humidity in December is 89%.Rainfall
In December, in Alta Floresta, the rain falls for 29.8 days. Throughout December, 254mm (10") of precipitation is accumulated. Throughout the year, there are 233.7 rainfall days, and 1653mm (65.08") of precipitation is accumulated.Daylight
With an average of 12h and 42min of daylight, December has the longest days of the year in Alta Floresta.On the first day of the month, sunrise is at 05:13 and sunset at 17:53. On the last day of December, in Alta Floresta, sunrise is at 05:26 and sunset at 18:08 -04.
Sunshine
In Alta Floresta, the average sunshine in December is 6.5h.UV index
The average daily maximum UV index in December is 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.Note: In December, an average UV index of 6 transforms into the following instructions:
Guard oneself from overexposure. Defence against sun injury is vital. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Frequently asked questions
How hot is it in Alta Floresta in December?
What is the average humidity in December in Alta Floresta?
How many days does it rain in December in Alta Floresta?
When are the longest days in Alta Floresta?
How many hours of daylight does Alta Floresta have in December?
What time are sunrise and sunset in December in Alta Floresta?
How long on average sun shines in December in Alta Floresta?
How high is the UV index in December in Alta Floresta?
Average temperature in December
Alta Floresta, Brazil
- Average high temperature in December: 29.4°C
The warmest month (with the highest average high temperature) is September (36.5°C).
The month with the lowest average high temperature is February (28.3°C).
- Average low temperature in December: 21.2°C
The month with the highest average low temperature is September (21.8°C).
The coldest month (with the lowest average low temperature) is July (18.3°C).
Average pressure in December
Alta Floresta, Brazil
- Average pressure in December: 1010mbar
The months with the highest atmospheric pressure are June and July (1013.8mbar).
The month with the lowest atmospheric pressure is November (1009.3mbar).
Average wind speed in December
Alta Floresta, Brazil
- Average wind speed in December: 4.1km/h
The windiest months (with the highest average wind speed) are July and August (5.8km/h).
The calmest month (with the lowest average wind speed) is March (3.7km/h).
Average humidity in December
Alta Floresta, Brazil
- Average humidity in December: 89%
The month with the highest relative humidity is February (92%).
The month with the lowest relative humidity is August (45%).
Average rainfall in December
Alta Floresta, Brazil
- Average rainfall in December: 254mm
The wettest month (with the highest rainfall) is March (288mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in December
Alta Floresta, Brazil
- Average rainfall days in December: 29.8 days
The month with the highest number of rainy days is January (30.2 days).
The month with the least rainy days is July (1.8 days).
Average daylight in December /
Average sunshine in December
Alta Floresta, Brazil
- Average daylight in December: 12h and 4min
The month with the longest days is December (Average daylight: 12h and 42min).
The month with the shortest days is June (Average daylight: 11h and 36min).
- Average sunshine in December: 6h and 3min
The months with the most sunshine are June and August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days in December
Alta Floresta, Brazil
- Average sunshine days in December: 0.8 days
The month with the most sunshine days is July (29.2 days).
The month with the least sunshine days is January (0.3 days).
Average UV index in December
Alta Floresta, Brazil
- Average UV index in December: 6
The months with the highest UV index are July, August and September (UV index 7).
The month with the lowest UV index is March (UV index 5).
Average cloud cover in December
Alta Floresta, Brazil
- Average cloud cover in December: 63
The month with the most cloud cover is February (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in December
Alta Floresta, 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, April and December (6km).
Alta Floresta, Brazil
Weather forecast for your location
2. Allow the app to use your location
