November weather forecast
São Luís, Brazil

November witnesses a slight increase in rainfall reaching 11mm (0.43"), signaling the slow approach of the heavy rainfall typical of São Luís’s wet season. Meanwhile, temperatures remain relatively stable. With minor variations, daylight hours continue to extend up to 12.2, ensuring adequate sun hours. A persistent UV index of 12 trailed from the last month, as observed in São Luís. November bridges the transition between the dry and wet seasons, with rainfall figures on the gradual rise.

Temperature

In São Luís, Brazil, November is the warmest month, with temperatures averaging a high of 31.4°C (88.5°F) and a low of 24°C (75.2°F).

Heat index

The heat index value during November is appraised at a blistering 42°C (107.6°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', gives a temperature feeling by integrating air temperature and humidity. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are largely significant for babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

In November, the average relative humidity is 79%.

Rainfall

In November, the rain falls for 1 days. Throughout November, 11mm (0.43") of precipitation is accumulated. Throughout the year, in São Luís, there are 130 rainfall days, and 2290mm (90.16") of precipitation is accumulated.

Sea temperature

In São Luís, the average seawater temperature in November is 27.8°C (82°F).
Note: For swimming, diving, or other water activities, the temperature range of 25°C (77°F) to 29°C (84.2°F) is perceived as exceptionally enjoyable and comfortable even for prolonged periods.

Daylight

In São Luís, the average length of the day in November is 12h and 14min.
On the first day of the month, sunrise is at 05:34 and sunset at 17:46. On the last day of November, sunrise is at 05:38 and sunset at 17:53 -03.

Sunshine

The average sunshine in November is 8.1h.

UV index

The months with the highest UV index in São Luís are January through April, September through December, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an extreme health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 12 during November translates into these guidelines:
Carry out every crucial safety measure. People with fair skin may sustain burns in fewer than 5 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Enhance your sun protection with tightly woven, yet airy clothing. Despite the overcast weather, sunscreen with SPF of at least 30 should be applied liberally and reapplied often, particularly after swimming or an outdoor workout. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.