January weather forecast
Guarujá, Brazil

Starting the year in Guarujá, Brazil, weather conditions provide a warm and inviting atmosphere ideal for beach activities. Humidity levels remain relatively high, an inherent feature of January weather that enhances the sensation of warmth. Sea temperatures navigate near their peak, favoring water sports. Among the characteristic atmospheric conditions, the most noticeable in January is the average rainfall of 115mm (4.53"), accentuating the tropical nature of this Brazilian paradise. The gentle breeze complements the high-temperature environment, facilitating refreshing moments of respite during the day.

Temperature

Guarujá indicates an average high-temperature of a still moderately hot 27.5°C (81.5°F) in January, showing minor variation from December's 26.2°C (79.2°F). Guarujá's average temperature throughout the nights in January exhibits a minor decrease from daytime highs, stabilizing at a still warm 24.4°C (75.9°F).

Heat index

In January, the heat index is estimated at a tropical 31°C (87.8°F). Staying active during long-term exposure might result in a state of exhaustion and cause heat cramps.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to 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.

Humidity

In January, the average relative humidity is 80%.

Rainfall

In Guarujá, during January, the rain falls for 21.8 days and regularly aggregates up to 115mm (4.53") of precipitation. Throughout the year, in Guarujá, there are 197.1 rainfall days, and 916mm (36.06") of precipitation is accumulated.

Sea temperature

In Guarujá, the average seawater temperature in January is 26.7°C (80.1°F).
Note: Water temperatures ranging between 25°C (77°F) and 29°C (84.2°F) are regarded as very warm, making swimming, diving, and similar water activities pleasurable for extended periods.

Daylight

The average length of the day in January is 13h and 25min.
On the first day of January in Guarujá, sunrise is at 05:20 and sunset at 18:56. On the last day of the month, sunrise is at 05:42 and sunset at 18:54 -03.

Sunshine

In Guarujá, the average sunshine in January is 7.9h.

UV index

The months with the highest UV index in Guarujá are January and December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 7 in January translates into these instructions:
Shun overexposure. Protection from sun ravages is indispensable. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Take heed! Reflections of sand and water make the Sun's UV rays stronger.