January weather forecast
Manaus, Brazil

Cloudy skies above the Amazon Theatre building in Manaus, Brazil
Cloudy skies above the Amazon Theatre building in Manaus, Brazil

Weather in January

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.
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FAQ

What is the temperature in January in Manaus?

In January, the average high-temperature is 30.5°C (86.9°F), and the average low-temperature is 23.1°C (73.6°F). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in January is appraised at 41°C (105.8°F).

What is the average humidity in January in Manaus?

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

How much does it rain in Manaus in January?

In Manaus, in January, during 19 rainfall days, 264mm (10.39") of precipitation is typically accumulated.

How many hours of daylight does Manaus have in January?

The average day length in January is 12h and 17min.

What time are sunrise and sunset in January in Manaus?

On the first day of January in Manaus, Brazil, sunrise is at 05:54 and sunset at 18:12. On the last day of the month, sunrise is at 06:06 and sunset at 18:20 -04.

How many hours of sunshine does Manaus have in January?

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

When is the highest UV index in Manaus?

January through May, August through December, with an average maximum UV index of 12, are months with the highest UV index.

How high is the UV index in January in Manaus?

In January, the average daily maximum UV index is 12. A UV Index estimate of 11, and higher, represents an ultimate hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average sunshine
Average UV index

Average temperature in January
Manaus, Brazil

Average temperature in January - Manaus, Brazil
  • Average high temperature in January: 30.5°C

The warmest month (with the highest average high temperature) is September (32.9°C).
The month with the lowest average high temperature is February (30.4°C).

  • Average low temperature in January: 23.1°C

The months with the highest average low temperature are October and November (23.7°C).
The coldest month (with the lowest average low temperature) is July (22.7°C).

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Average humidity in January
Manaus, Brazil

Average humidity in January - Manaus, Brazil
  • Average humidity in January: 86%

The month with the highest relative humidity is March (88%).
The months with the lowest relative humidity are August and September (77%).

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Average rainfall in January
Manaus, Brazil

Average rainfall in January - Manaus, Brazil
  • Average rainfall in January: 264.2mm

The wettest month (with the highest rainfall) is March (335.4mm).
The driest month (with the least rainfall) is August (47.3mm).

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Average rainfall days in January
Manaus, Brazil

Average rainfall days in January - Manaus, Brazil
  • Average rainfall days in January: 19 days

The month with the highest number of rainy days is March (20 days).
The months with the least rainy days are August and September (6 days).

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Average daylight in January /
Average sunshine in January
Manaus, Brazil

Average daylight in January / Average sunshine in January - Manaus, Brazil
  • Average daylight in January: 12h and 17min

The month with the longest days is December (Average daylight: 12h and 18min).
The month with the shortest days is June (Average daylight: 11h and 57min).

  • Average sunshine in January: 3h and 42min

The month with the most sunshine is August (Average sunshine: 7h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 6min).

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Average UV index in January
Manaus, Brazil

Average UV index in January - Manaus, Brazil
  • Average UV index in January: 12

The months with the highest UV index are January, February, March, April, May, August, September, October, November and December (UV index 12).
The month with the lowest UV index is July (UV index 10).

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