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

June weather forecast and climate
São Luís, Brazil

June, the first month of the winter, in São Luís, is also a hot month, with average temperature fluctuating between 30.4°C (86.7°F) and 22.9°C (73.2°F).

Temperature

In June, the average high-temperature is practically the same as in May - a still hot 30.4°C (86.7°F). In June, in São Luís, the average low-temperature is 22.9°C (73.2°F).

Heat index

In June, the average heat index is estimated at an extremely hot 40.9°C (105.6°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like clothing, wind, pregnancy, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for 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.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of 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. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in June is 86%.

Rainfall

In São Luís, Brazil, it is raining for 13 days, with typically 173.3mm (6.8") of accumulated precipitation. Throughout the year, in São Luís, there are 130 rainfall days, and 2290.2mm (90.2") of precipitation is accumulated.

Sea temperature

In São Luís, the average seawater temperature 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.

Sunshine

The average sunshine in São Luís is 7.1h.

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 unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 10 transform into the following instructions:
Take special precautions, as unprotected skin can be damaged and can burn quickly. 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. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in June in São Luís?

The average high-temperature, in June, in São Luís, is 30.4°C (86.7°F), while the average low-temperature is 22.9°C (73.2°F). In June, the average heat index (a.k.a. 'real feel', 'feels like'), that represents influence of the relative humidity to air temperaure, is appraised at 40.9°C (105.6°F).

What is the average humidity in June in São Luís?

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

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

In June, in São Luís, the rain falls for 13 days. Throughout June, 173.3mm (6.8") of precipitation is accumulated.

How warm is the water in June in São Luís?

In São Luís, Brazil, the average seawater temperature in June is 28.3°C (82.9°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

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

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

How many hours of daylight does São Luís have in June?

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

How long on average sun shines in June in São Luís?

In June, the average sunshine in São Luís is 7.1h.

When is the lowest UV index in São Luís?

Months with the lowest UV index are June and July, with an average maximum UV index of 10.

How high is the UV index in June in São Luís?

In June, the average daily maximum UV index in São Luís is 10. A UV Index of 8 to 10 symbolizes a very high health vulnerability from unprotected exposure to the UV radiation.
Average temperature in June - São Luís, Brazil
  • Average high temperature in June: 30.4°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 June: 22.9°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 June - São Luís, Brazil
  • Average humidity in June: 86%

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

Average rainfall in June - São Luís, Brazil
  • Average rainfall in June: 173.3mm

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 June - São Luís, Brazil
  • Average rainfall days in June: 13 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 June - São Luís, Brazil
  • Average sea temperature in June: 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 June / Average sunshine in June - São Luís, Brazil
  • Average daylight in June: 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 June: 7.1h

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 June - São Luís, Brazil
  • Average UV index in June: 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).