April weather forecast
Santa Isabel do Rio Negro, Brazil

April, like March, in Santa Isabel do Rio Negro, Brazil, is a moderately hot autumn month, with an average temperature fluctuating between 22.6°C (72.7°F) and 29.8°C (85.6°F).

Temperature

As April takes its course, Santa Isabel do Rio Negro's average high-temperature registers at a warm 29.8°C (85.6°F), closely aligning with the preceding month. The nights of April anticipate an average low-temperature of 22.6°C (72.7°F).

Heat index

April's heat index is estimated at a blisteringly hot 40°C (104°F). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', integrates the air's temperature and its humidity to showcase the felt temperature by people. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In Santa Isabel do Rio Negro, the average relative humidity in April is 90%.

Rainfall

In Santa Isabel do Rio Negro, Brazil, during April, the rain falls for 28.2 days and regularly aggregates up to 237mm (9.33") of precipitation. Throughout the year, there are 308 rainfall days, and 1836mm (72.28") of precipitation is accumulated.

Daylight

The average length of the day in April in Santa Isabel do Rio Negro is 12h and 7min.
On the first day of April in Santa Isabel do Rio Negro, sunrise is at 06:20 and sunset at 18:26. On the last day of the month, sunrise is at 06:14 and sunset at 18:20 -04.

Sunshine

In April, the average sunshine is 5.2h.

UV index

January through June, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index of 6 during April translates into these guidelines:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.