São Luís
Brazil
Long-term weather forecast
Long-term weather forecast

July weather forecast and climate
São Luís, Brazil

July, like June, is another hot winter month in São Luís, Brazil, with average temperature ranging between max 30.2°C (86.4°F) and min 22.6°C (72.7°F).

Temperature

In São Luís, the average high-temperature is practically the same as in June - a still hot 30.2°C (86.4°F). In São Luís, the average low-temperature is 22.6°C (72.7°F).

Heat index

The average heat index is appraised at a blistering 40.2°C (104.4°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, pregnancy, metabolic differences, and clothing affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In São Luís, the average relative humidity in July is 86%.

Rainfall

In São Luís, in July, it is raining for 10 days, with typically 131.1mm (5.2") of accumulated precipitation. In São Luís, Brazil, during the entire year, the rain falls for 130 days and collects up to 2290.2mm (90.2") of precipitation.

Sea temperature

In July, the average sea temperature in São Luís is 28.3°C (82.9°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

May through August, with an average of 12h of daylight, are months with the shortest days in São Luís.

Sunshine

In July, the average sunshine is 7.7h.

UV index

Months with the lowest UV index are June and July, with an average maximum UV index of 10. A UV Index estimate of 8 to 10 represents a very high health vulnerability from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 10 transform into the following instructions:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in July in São Luís?

The average high-temperature, in July, is 30.2°C (86.4°F), while the average low-temperature is 22.6°C (72.7°F). In July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), that combines relative humidity and air temperature, is estimated at 40.2°C (104.4°F).

What is the average humidity in July in São Luís?

The average relative humidity in July in São Luís is 86%.

How many days does it rain in July in São Luís?

In July, in São Luís, Brazil, the rain falls for 10 days. Throughout July, 131.1mm (5.2") of precipitation is accumulated.

What is the sea water temperature in July in São Luís?

In July, the average sea temperature is 28.3°C (82.9°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the month with the shortest days in São Luís?

Months with the shortest days in São Luís are May through August, with an average of 12h of daylight.

What is the average length of the day in July in São Luís?

The average length of the day in July in São Luís is 12h.

How many hours of sunshine does São Luís have in July?

In São Luís, Brazil, the average sunshine in July is 7.7h.

What is the month with the lowest UV index in São Luís?

June and July, with an average maximum UV index of 10, are months with the lowest UV index in São Luís, Brazil.

What is the UV index reading in July in São Luís?

In São Luís, the average daily maximum UV index in July is 10. A UV Index estimate of 8 to 10 represents a very high health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in July - São Luís, Brazil
  • Average high temperature in July: 30.2°C

The warmest month (with the highest average high temperature) is November (31.4°C).
Months with the lowest average high temperature are February and March (29.4°C).

  • Average low temperature in July: 22.6°C

Months with the highest average low temperature are November and December (24°C).
The coldest month (with the lowest average low temperature) is July (22.6°C).

Average humidity in July - São Luís, Brazil
  • Average humidity in July: 86%

The month with the highest relative humidity is April (90%).
The month with the lowest relative humidity is December (71%).

Average rainfall in July - São Luís, Brazil
  • Average rainfall in July: 131.1mm

The wettest month (with the highest rainfall) is April (475.9mm).
The driest month (with the lowest rainfall) is October (7.6mm).

Average rainfall days in July - São Luís, Brazil
  • Average rainfall days in July: 10 days

The month with the highest number of rainy days is March (23 days).
Months with the lowest number of rainy days are October and November (1 days).

Average sea temperature in July - São Luís, Brazil
  • Average sea temperature in July: 28.3°C

The best month for swimming (with the highest average sea temperature) is March (28.9°C).
The coldest month (with the lowest average sea temperature) is September (27.3°C).

Average daylight in July / Average sunshine in July - São Luís, Brazil
  • Average daylight in July: 12h

Months with the longest days are January and December (Average daylight: 12.3h).
Months with shortest days are May, June, July and August (Average daylight: 12h).

  • Average sunshine in July: 7.7h

The month with most sunshine is August (Average sunshine: 8.4h).
The month with least sunshine is March (Average sunshine: 3.5h).

Average UV index in July - São Luís, Brazil
  • Average UV index in July: 10

Months with the highest UV index are January, February, March, April, September, October, November and December (UV index 12).
Months with the lowest UV index are June and July (UV index 10).