June weather forecast
São Fernando, Brazil

June, the first month of the winter in São Fernando, is still a tropical month, with an average temperature fluctuating between 21.4°C (70.5°F) and 32°C (89.6°F).

Temperature

São Fernando starts June with an average high-temperature of a still hot 32°C (89.6°F), hinting at a minimal fluctuation from May. São Fernando records an average nighttime low of 21.4°C (70.5°F) in June.

Heat index

The average heat index in June is calculated to be a sweltering 39°C (102.2°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
Consider that heat index readings are for situations in the shade and light wind. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', shows a temperature sensation when both heat and moisture conditions are combined. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

In June, the average relative humidity is 65%.

Rainfall

In São Fernando, in June, it is raining for 10.1 days, with typically 26mm (1.02") of accumulated precipitation. In São Fernando, during the entire year, the rain falls for 122.6 days and collects up to 442mm (17.4") of precipitation.

Daylight

June has the shortest days of the year, with an average of 11h and 48min of daylight.
On the first day of the month, sunrise is at 05:33 and sunset at 17:19. On the last day of June, sunrise is at 05:39 and sunset at 17:25 -03.

Sunshine

In São Fernando, the average sunshine in June is 9h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index in São Fernando are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index, 7 in June, converts into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.