January weather forecast
Manaus, Brazil

January, the same as December, in Manaus, Brazil, is a hot summer month, with an average temperature ranging between max 30.5°C (86.9°F) and min 23.1°C (73.6°F).

Temperature

In Manaus, the average high-temperature in January is relatively the same as in December - a still tropical 30.5°C (86.9°F). In January, in Manaus, the average low-temperature is 23.1°C (73.6°F).

Heat index

The average heat index in January is appraised at a scorching 41°C (105.8°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, metabolic differences, pregnancy), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In January, the average relative humidity in Manaus is 86%.

Rainfall

In January, in Manaus, the rain falls for 19 days. Throughout January, 264mm (10.39") of precipitation is accumulated. Throughout the year, there are 160 rainfall days, and 2307mm (90.83") of precipitation is accumulated.

Daylight

The average length of the day in January is 12h and 17min.
On the first day of the month, sunrise is at 05:54 and sunset at 18:12. On the last day of January, in Manaus, sunrise is at 06:06 and sunset at 18:20 -04.

Sunshine

In Manaus, Brazil, the average sunshine in January is 3.7h.

UV index

The months with the highest UV index are January through May, August through December, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an extreme health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 12 in January interpret into the following advice:
Take all required precautions, as unprotected skin and eyes can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim.