January weather forecast
Manaus, Brazil

The beginning of a new year brings humid weather to Manaus, Brazil, making the experience slightly sultry and tropical. January tends to be warm, with the average high temperature peaking at 30.5°C (86.9°F), presenting a perfect opportunity for beach-goers and sun-seekers. Humidity is high and there is plenty of rain. Explorers may also be tempted by the city's interesting cultural and architectural attractions, unmitigated by the effects of weather. The days are long, ensuring plenty of time to explore.

Temperature

The onset of January in Manaus manifests an average high-temperature of a still hot 30.5°C (86.9°F), demonstrating a minor variation from the preceding month. Manaus experiences an average nighttime temperature of 23.1°C (73.6°F) in the month of January.

Heat index

In January, the average heat index is calculated to be an extremely hot 41°C (105.8°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Consider that heat index readings are for situations in the shade and light wind. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold great significance 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.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In January, the average relative humidity is 86%.

Rainfall

In Manaus, Brazil, in January, during 19 rainfall days, 264mm (10.39") of precipitation is typically accumulated. In Manaus, Brazil, during the entire year, the rain falls for 160 days and collects up to 2307mm (90.83") of precipitation.

Daylight

In January, the average length of the day in Manaus 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, sunrise is at 06:05 and sunset at 18:20 -04.

Sunshine

The average sunshine in January in Manaus 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 value of 11, and more, symbolizes an extreme threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In January, the maximum UV index of 12 suggests these recommendations:
Take all required precautions, as unprotected skin and eyes can burn in minutes. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Broad-spectrum SPF 30+ sunscreen must be generously applied and reapplied every two hours or post any outdoor activity or swim.