January weather forecast
Porto Velho, Brazil

January, the same as December, is a moderately hot summer month in Porto Velho, Brazil, with an average temperature ranging between min 22.5°C (72.5°F) and max 29.6°C (85.3°F).

Temperature

The introduction of January notes a subtle temperature variation to a moderately hot 29.6°C (85.3°F) from December's 30.5°C (86.9°F). Porto Velho, during the month of January, experiences an average low-temperature of 22.5°C (72.5°F).

Heat index

The average heat index in January is estimated at an extremely hot 40°C (104°F). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
In the scope of the heat index, its values resonate with shade and light wind conditions. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is found by incorporating humidity levels into the air temperature measurement. 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. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. 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.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

In Porto Velho, Brazil, the average relative humidity in January is 91%.

Rainfall

The month with the most rainfall in Porto Velho is January, when the rain falls for 30.3 days and typically aggregates up to 242mm (9.53") of precipitation.

Daylight

In January, the average length of the day in Porto Velho, Brazil, is 12h and 34min.
On the first day of January in Porto Velho, Brazil, sunrise is at 06:00 and sunset at 18:37. On the last day of the month, sunrise is at 06:14 and sunset at 18:43 -04.

Sunshine

The average sunshine in January is 5.1h.

UV index

January through April and December, with an average maximum UV index of 6, are months with the lowest UV index in Porto Velho. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: In January, the maximum UV index of 6 suggests this advice:
Evade overexposure. Individuals with fair skin risk burning in under 20 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. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.