January weather forecast
Rio Real, Brazil

January, like December, is another tropical summer month in Rio Real, Brazil, with temperature in the range of an average high of 32.2°C (90°F) and an average low of 21.4°C (70.5°F).

Temperature

The commencement of January brings an average high-temperature of a still tropical 32.2°C (90°F), marking an inconsequential divergence from December. Rio Real records an average nighttime low of 21.4°C (70.5°F) in January.

Heat index

The average heat index in January is calculated to be a blisteringly hot 42°C (107.6°F). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is the outcome of merging air's temperature and its humidity metrics. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

In Rio Real, the average relative humidity in January is 73%.

Rainfall

In January, the rain falls for 15.3 days. Throughout January, 38mm (1.5") of precipitation is accumulated. In Rio Real, during the entire year, the rain falls for 201.7 days and collects up to 430mm (16.93") of precipitation.

Daylight

In Rio Real, the average length of the day in January is 12h and 43min.
On the first day of the month, sunrise is at 05:11 and sunset at 17:58. On the last day of January, sunrise is at 05:26 and sunset at 18:03 -03.

Sunshine

With an average of 8.9h of sunshine, January has the most sunshine of the year.

UV index

The months with the highest UV index are January through March, November and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: A daily maximum UV index of 7 in January translates into the following instructions:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.