January weather forecast
Botafogo, Brazil

January, the same as December, is a moderately hot summer month in Botafogo, Brazil, with temperature in the range of an average high of 29.2°C (84.6°F) and an average low of 23.7°C (74.7°F).

Temperature

Botafogo experiences an average high-temperature of a still moderately hot 29.2°C (84.6°F) in January, subtly different from December's 28.2°C (82.8°F). January's nights observe an average temperature of 23.7°C (74.7°F).

Heat index

For most parts of January, the heat index is evaluated at a very hot 35°C (95°F). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. 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. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

In Botafogo, the average relative humidity in January is 79%.

Rainfall

In January, the rain falls for 19.8 days. Throughout January, 102mm (4.02") of precipitation is accumulated. In Botafogo, during the entire year, the rain falls for 192.5 days and collects up to 812mm (31.97") of precipitation.

Daylight

In Botafogo, the average length of the day in January is 13h and 22min.
On the first day of January, sunrise is at 05:10 and sunset at 18:41. On the last day of the month, sunrise is at 05:31 and sunset at 18:40 -03.

Sunshine

The average sunshine in January is 8.5h.

UV index

January is the month with the highest UV index, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum UV index, 7 during January, leads to the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Stay sun-safe with clothing that is both closely woven and worn loosely.