January weather forecast
Pedra de Guaratiba, Brazil

January, the same as December, is another warm summer month in Pedra de Guaratiba, Brazil, with an average temperature varying between 29.7°C (85.5°F) and 23.3°C (73.9°F).

Temperature

Pedra de Guaratiba ushers in January with an average high-temperature of a still warm 29.7°C (85.5°F), showing a close resemblance to the previous month. During January, the average low-temperature is a still warm 23.3°C (73.9°F).

Heat index

The heat index in January is evaluated at a torrid 37°C (98.6°F). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

The average relative humidity in January is 81%.

Rainfall

In Pedra de Guaratiba, Brazil, in January, it is raining for 20.5 days, with typically 104mm (4.09") of accumulated precipitation. In Pedra de Guaratiba, during the entire year, the rain falls for 194 days and collects up to 879mm (34.61") of precipitation.

Daylight

The average length of the day in January in Pedra de Guaratiba, Brazil, is 13h and 22min.
On the first day of the month, sunrise is at 05:12 and sunset at 18:43. On the last day of January, sunrise is at 05:33 and sunset at 18:42 -03.

Sunshine

The average sunshine in January is 8.3h.

UV index

The months with the highest UV index are January and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: In January, the average maximum UV index of 7 translates into the following recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.