January weather forecast
Cabo Frio, Brazil

Following the start of the new year at Cabo Frio, the month of January boasts a high temperature of 27.7°C (81.9°F) and one of the year's highest relative humidity at 82% making it quite humid. The sun remains in the sky for up to 13.4 hours while the sea temperature tends to remain warm at 24.8°C (76.6°F) providing ideal conditions for beach activities. The town also experiences moderate rainfall, with frequent occurrences. Moving into February, a minor decline in weather parameters can be noticed.

Temperature

The arrival of January in Cabo Frio brings an average high-temperature of a still warm 27.7°C (81.9°F), closely following the temperature pattern of December. Nighttime temperatures during January report a consistent average of 24.3°C (75.7°F).

Heat index

For January, the heat index is appraised at a tropical 32°C (89.6°F). Persisting in activity during long-term exposure might induce weariness, with subsequent heat cramps.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. 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. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.

Humidity

In January, the average relative humidity is 82%.

Rainfall

In Cabo Frio, in January, during 15.8 rainfall days, 81mm (3.19") of precipitation is typically accumulated. In Cabo Frio, during the entire year, the rain falls for 173.2 days and collects up to 733mm (28.86") of precipitation.

Sea temperature

In Cabo Frio, the average seawater temperature in January is 24.8°C (76.6°F).
Note: Factoring in a person's dislike for cold, combined with conditions like sunshine, wind, and temperature, a dip in 24.8°C (76.6°F) waters might be satisfying. (It is worth noting that the Olympic swimming waters are maintained between 25°C (77°F) and 28°C (82.4°F).)

Daylight

The average length of the day in January is 13h and 21min.
On the first day of January in Cabo Frio, Brazil, sunrise is at 05:06 and sunset at 18:36. On the last day of the month, sunrise is at 05:27 and sunset at 18:35 -03.

Sunshine

The average sunshine in January is 8.8h.

UV index

The months with the highest UV index are January and February, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 7 in January transforms into the following instructions:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Stay cautious! Sand and water reflections increase UV radiation potency.