Climate - Sao Luis (Brazil)

The climate of São Luís is tropical, with a rainy season from late December to July and a dry season from August to November.
The city is the capital of the state of Maranhão and is located in the north-east of Brazil, on an island near the coast, the island of Upaon-açu (or São Luís). On the island there are also the cities of São José de Ribamar, Paço do Lumiar, and Raposa. In the area, there are branches of some rivers that flow into the sea, the main one being the Mearim River.

The average temperature of the coldest month (March) is of 27.5 °C (81.5 °F), that of the warmest month (November) is of 29.1 °C (84.4 °F). Here are the average temperatures.
Precipitation amounts to 2290 millimeters (90.2 inches) per year: it is therefore abundant. It ranges from 8 mm (0.3 in) in the driest month (October) to 475 mm (18.7 in) in the wettest one (April). Here is the average precipitation.
The sea temperature ranges from 27 °C (27 °F) in September to 28.5 °C (28.5 °F) in February, March, April, May, June. Here are the average sea temperatures.
On average, there are around 2315 sunshine hours per year. Here are the average sunshine hours per day.

Sao Luis - Weather by month

Based on the period 1991-2020
(January - February - March - April - May - June - July - August - September - October - November - December)

In January, the average temperature is of 28.1 °C (83 °F), with a minimum of 24.8 °C (76.7 °F) and a maximum of 31.4 °C (88.4 °F).
On the coldest nights of the month, the temperature usually drops to around 22.5 °C (72 °F).
On the warmest days of the month, the temperature usually reaches around 33.5 °C (92 °F).
Precipitation amounts to 245 mm (9.6 in), distributed over 13 days.
On average, there are 155 hours of sunshine per month, i.e. 5 hours per day.
The average humidity is 79%.
The average wind speed is 14 kph (9 kph).
The average sea temperature is of 28 °C (82.5 °F).

In February, the average temperature is of 27.7 °C (82 °F), with a minimum of 24.4 °C (76 °F) and a maximum of 31 °C (87.8 °F).
On the coldest nights of the month, the temperature usually drops to around 22 °C (71.5 °F).
On the warmest days of the month, the temperature usually reaches around 33 °C (91.5 °F).
Precipitation amounts to 375 mm (14.8 in), distributed over 17 days.
On average, there are 115 hours of sunshine per month, i.e. 4 hours per day.
The average humidity is 82%.
The average wind speed is 12 kph (8 kph).
The average sea temperature is of 28.5 °C (83 °F).

In March, the coldest month of the year, the average temperature is of 27.5 °C (82 °F), with a minimum of 24.3 °C (75.8 °F) and a maximum of 30.7 °C (87.2 °F).
On the coldest nights of the month, the temperature usually drops to around 22.5 °C (72 °F).
On the warmest days of the month, the temperature usually reaches around 32.5 °C (90.5 °F).
Precipitation amounts to 430 mm (16.9 in), distributed over 23 days.
On average, there are 105 hours of sunshine per month, i.e. 3.5 hours per day.
The average humidity is 84%.
The average wind speed is 11 kph (7 kph).
The average sea temperature is of 28.5 °C (83.5 °F).

In April, the average temperature is of 27.6 °C (82 °F), with a minimum of 24.4 °C (75.9 °F) and a maximum of 30.9 °C (87.6 °F).
On the coldest nights of the month, the temperature usually drops to around 22.5 °C (73 °F).
On the warmest days of the month, the temperature usually reaches around 32.5 °C (91 °F).
Precipitation amounts to 475 mm (18.7 in), distributed over 22 days.
On average, there are 115 hours of sunshine per month, i.e. 4 hours per day.
The average humidity is 84%.
The average wind speed is 9 kph (6 kph).
The average sea temperature is of 28.5 °C (83.5 °F).

In May, the average temperature is of 28.0 °C (82 °F), with a minimum of 24.5 °C (76.1 °F) and a maximum of 31.4 °C (88.5 °F).
On the coldest nights of the month, the temperature usually drops to around 22.5 °C (72.5 °F).
On the warmest days of the month, the temperature usually reaches around 33.5 °C (92 °F).
Precipitation amounts to 315 mm (12.4 in), distributed over 20 days.
On average, there are 165 hours of sunshine per month, i.e. 5 hours per day.
The average humidity is 82%.
The average wind speed is 9 kph (6 kph).
The average sea temperature is of 28.5 °C (83.5 °F).

In June, the average temperature is of 28.0 °C (82 °F), with a minimum of 24.4 °C (76 °F) and a maximum of 31.6 °C (89 °F).
On the coldest nights of the month, the temperature usually drops to around 22.5 °C (72 °F).
On the warmest days of the month, the temperature usually reaches around 33 °C (91.5 °F).
Precipitation amounts to 175 mm (6.9 in), distributed over 13 days.
On average, there are 215 hours of sunshine per month, i.e. 7 hours per day.
The average humidity is 80%.
The average wind speed is 10 kph (6 kph).
The average sea temperature is of 28.5 °C (83 °F).

In July, the average temperature is of 28.0 °C (82 °F), with a minimum of 24.4 °C (75.9 °F) and a maximum of 31.6 °C (88.8 °F).
On the coldest nights of the month, the temperature usually drops to around 22.5 °C (73 °F).
On the warmest days of the month, the temperature usually reaches around 33 °C (91.5 °F).
Precipitation amounts to 130 mm (5.1 in), distributed over 10 days.
On average, there are 240 hours of sunshine per month, i.e. 7.5 hours per day.
The average humidity is 78%.
The average wind speed is 11 kph (7 kph).
The average sea temperature is of 28 °C (82 °F).

In August, the average temperature is of 28.4 °C (83 °F), with a minimum of 24.8 °C (76.6 °F) and a maximum of 32.1 °C (89.7 °F).
On the coldest nights of the month, the temperature usually drops to around 23 °C (73.5 °F).
On the warmest days of the month, the temperature usually reaches around 34 °C (93 °F).
Precipitation amounts to 30 mm (1.2 in), distributed over 4 days.
On average, there are 260 hours of sunshine per month, i.e. 8.5 hours per day.
The average humidity is 75%.
The average wind speed is 15 kph (9 kph).
The average sea temperature is of 27.5 °C (81.5 °F).

In September, the average temperature is of 28.8 °C (84 °F), with a minimum of 25.2 °C (77.4 °F) and a maximum of 32.4 °C (90.4 °F).
On the coldest nights of the month, the temperature usually drops to around 23 °C (73.5 °F).
On the warmest days of the month, the temperature usually reaches around 34 °C (93 °F).
Precipitation amounts to 25 mm (1 in), distributed over 2 days.
On average, there are 250 hours of sunshine per month, i.e. 8.5 hours per day.
The average humidity is 72%.
The average wind speed is 18 kph (11 kph).
The average sea temperature is of 27 °C (81 °F).

In October, the average temperature is of 29.0 °C (84 °F), with a minimum of 25.6 °C (78 °F) and a maximum of 32.5 °C (90.5 °F).
On the coldest nights of the month, the temperature usually drops to around 23.5 °C (74.5 °F).
On the warmest days of the month, the temperature usually reaches around 34 °C (93.5 °F).
Precipitation amounts to only 8 mm (0.3 in), distributed over 1 days.
On average, there are 250 hours of sunshine per month, i.e. 8 hours per day.
The average humidity is 71%.
The average wind speed is 20 kph (12 kph).
The average sea temperature is of 27.5 °C (81 °F).

In November, the warmest month of the year, the average temperature is of 29.1 °C (84 °F), with a minimum of 25.8 °C (78.4 °F) and a maximum of 32.5 °C (90.5 °F).
On the coldest nights of the month, the temperature usually drops to around 23.5 °C (74.5 °F).
On the warmest days of the month, the temperature usually reaches around 34 °C (93 °F).
Precipitation amounts to 10 mm (0.4 in), distributed over 1 days.
On average, there are 245 hours of sunshine per month, i.e. 8 hours per day.
The average humidity is 71%.
The average wind speed is 19 kph (12 kph).
The average sea temperature is of 27.5 °C (81.5 °F).

In December, the warmest month of the year, the average temperature is of 29.0 °C (84 °F), with a minimum of 25.7 °C (78.2 °F) and a maximum of 32.4 °C (90.3 °F).
On the coldest nights of the month, the temperature usually drops to around 23 °C (73.5 °F).
On the warmest days of the month, the temperature usually reaches around 34 °C (93.5 °F).
Precipitation amounts to 75 mm (3 in), distributed over 4 days.
On average, there are 205 hours of sunshine per month, i.e. 6.5 hours per day.
The average humidity is 73%.
The average wind speed is 18 kph (11 kph).
The average sea temperature is of 28 °C (82 °F).