January weather forecastFlamengo, Brazil

Weather in January

January, like December, in Flamengo, Brazil, is a moderately hot summer month, with an average temperature varying between 23.7°C (74.7°F) and 29.2°C (84.6°F).

Temperature

Flamengo observes an average high-temperature of a still moderately hot 29.2°C (84.6°F) in January, barely different from 28.2°C (82.8°F) in December. Flamengo reports an average low-temperature of 23.7°C (74.7°F) during the nights of January.

Heat index

The heat index for January is appraised at a torrid 35°C (95°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', reflects the feeling of heat when considering both air temperature and humidity. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

The average relative humidity in January is 79%.

Rainfall

In Flamengo, Brazil, during January, the rain falls for 19.8 days and regularly aggregates up to 102mm (4.02") of precipitation. Throughout the year, there are 192.5 rainfall days, and 812mm (31.97") of precipitation is accumulated.

Daylight

In Flamengo, 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

In Flamengo, the average sunshine in January is 8.5h.

UV index

The month with the highest UV index is January, 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 the ordinary person.
Note: A daily maximum UV index of 7 in January translates into the following instructions:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.