January weather forecast
São Sebastião da Boa Vista, Brazil

January, like December, is a hot summer month in São Sebastião da Boa Vista, Brazil, with an average temperature varying between 31.3°C (88.3°F) and 22.9°C (73.2°F).

Temperature

The arrival of January sees an average high-temperature of a still hot 31.3°C (88.3°F), hardly diverging from December's 32.7°C (90.9°F). São Sebastião da Boa Vista, in January, witnesses an average low-temperature of 22.9°C (73.2°F).

Heat index

The heat index value for January is estimated at a blisteringly hot 43°C (109.4°F). Caution: Heat cramps along with heat exhaustion are expected. Sustained activity could lead to heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is achieved by amalgamating air temperature with the relative humidity readings. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In São Sebastião da Boa Vista, the average relative humidity in January is 84%.

Rainfall

In São Sebastião da Boa Vista, during January, the rain falls for 29.6 days and regularly aggregates up to 192mm (7.56") of precipitation. In São Sebastião da Boa Vista, during the entire year, the rain falls for 285.2 days and collects up to 1825mm (71.85") of precipitation.

Daylight

In São Sebastião da Boa Vista, the average length of the day in January is 12h and 13min.
On the first day of the month, sunrise is at 06:14 and sunset at 18:28. On the last day of January, in São Sebastião da Boa Vista, sunrise is at 06:25 and sunset at 18:37 -03.

Sunshine

The average sunshine in January in São Sebastião da Boa Vista, Brazil, is 6.9h.

UV index

The months with the lowest UV index in São Sebastião da Boa Vista, Brazil, are January through April and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 6 in January interprets into the following recommendations:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. 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.