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
Rio Fortuna marks the arrival of December with an average high-temperature of a still moderately hot 27.8°C (82°F), hardly different from November's 25.8°C (78.4°F). In the month of December, Rio Fortuna records a consistent average low-temperature of 18.8°C (65.8°F).Heat index
Throughout December, the heat index is calculated to be a hot 32°C (89.6°F). Continuous activity in exposure could lead to a feeling of fatigue and heat cramps.Keep in mind the heat index values are meant for areas in shade and with light wind. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Humidity
November and December, with an average relative humidity of 80%, are the least humid months in Rio Fortuna.Rainfall
In Rio Fortuna, Brazil, during December, the rain falls for 15.4 days and regularly aggregates up to 70mm (2.76") of precipitation. Throughout the year, in Rio Fortuna, Brazil, there are 172.3 rainfall days, and 881mm (34.69") of precipitation is accumulated.Daylight
December has the longest days of the year in Rio Fortuna, with an average of 13h and 54min of daylight.On the first day of the month, sunrise is at 05:11 and sunset at 18:59. On the last day of December, sunrise is at 05:22 and sunset at 19:16 -03.
Sunshine
The average sunshine in December is 7.4h.UV index
January through March and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 in December interprets into the following recommendations:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in Rio Fortuna?
What is the least humid month in Rio Fortuna?
What is the average humidity in December in Rio Fortuna?
How much does it rain in Rio Fortuna in December?
When are the longest days in Rio Fortuna?
What is the average length of the day in December in Rio Fortuna?
When are sunrise and sunset in December in Rio Fortuna?
How many hours of sunshine does Rio Fortuna have in December?
When is the highest UV index in Rio Fortuna?
What is the UV index reading in December in Rio Fortuna?
Average temperature in December
Rio Fortuna, Brazil
- Average high temperature in December: 27.8°C
The warmest month (with the highest average high temperature) is February (28.8°C).
The month with the lowest average high temperature is July (19.8°C).
- Average low temperature in December: 18.8°C
The month with the highest average low temperature is February (19.9°C).
The coldest month (with the lowest average low temperature) is July (11.5°C).
Average pressure in December
Rio Fortuna, Brazil
- Average pressure in December: 1012.1mbar
The month with the highest atmospheric pressure is July (1020.1mbar).
The month with the lowest atmospheric pressure is December (1012.1mbar).
Average wind speed in December
Rio Fortuna, Brazil
- Average wind speed in December: 9.5km/h
The windiest months (with the highest average wind speed) are October and November (10.7km/h).
The calmest month (with the lowest average wind speed) is February (8.2km/h).
Average humidity in December
Rio Fortuna, Brazil
- Average humidity in December: 80%
The months with the highest relative humidity are March, May and June (83%).
The months with the lowest relative humidity are November and December (80%).
Average rainfall in December
Rio Fortuna, Brazil
- Average rainfall in December: 70mm
The wettest month (with the highest rainfall) is January (106mm).
The driest month (with the least rainfall) is November (47mm).
Average rainfall days in December
Rio Fortuna, Brazil
- Average rainfall days in December: 15.4 days
The month with the highest number of rainy days is February (19.1 days).
The month with the least rainy days is June (10.8 days).
Average daylight in December /
Average sunshine in December
Rio Fortuna, Brazil
- Average daylight in December: 13h and 5min
The month with the longest days is December (Average daylight: 13h and 54min).
The month with the shortest days is June (Average daylight: 10h and 24min).
- Average sunshine in December: 7h and 2min
The month with the most sunshine is June (Average sunshine: 7h and 30min).
The month with the least sunshine is October (Average sunshine: 6h and 54min).
Average sunshine days in December
Rio Fortuna, Brazil
- Average sunshine days in December: 13.1 days
The month with the most sunshine days is June (18.2 days).
The month with the least sunshine days is February (7.6 days).
Average UV index in December
Rio Fortuna, Brazil
- Average UV index in December: 6
The months with the highest UV index are January, February, March and December (UV index 6).
The month with the lowest UV index is July (UV index 4).
Average cloud cover in December
Rio Fortuna, Brazil
- Average cloud cover in December: 47
The months with the most cloud cover are January and October (Cloud cover 48).
The months with the least cloud cover are June and August (Cloud cover 37).
Average visibility in December
Rio Fortuna, Brazil
- Average visibility in December: 8km
The months with the highest visibility are July, August and November (9km).
The months with the lowest visibility are January, February, March, April, May, June, September, October and December (8km).
